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246,700 | alejandroautalan/pygubu | pygubudesigner/previewer.py | PreviewHelper._get_slot | def _get_slot(self):
"Returns the next coordinates for a preview"
x = y = 10
for k, p in self.previews.items():
y += p.height() + self.padding
return x, y | python | def _get_slot(self):
"Returns the next coordinates for a preview"
x = y = 10
for k, p in self.previews.items():
y += p.height() + self.padding
return x, y | [
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246,701 | alejandroautalan/pygubu | pygubu/stockimage.py | StockImage.clear_cache | def clear_cache(cls):
"""Call this before closing tk root"""
#Prevent tkinter errors on python 2 ??
for key in cls._cached:
cls._cached[key] = None
cls._cached = {} | python | def clear_cache(cls):
#Prevent tkinter errors on python 2 ??
for key in cls._cached:
cls._cached[key] = None
cls._cached = {} | [
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246,702 | alejandroautalan/pygubu | pygubu/stockimage.py | StockImage.register | def register(cls, key, filename):
"""Register a image file using key"""
if key in cls._stock:
logger.info('Warning, replacing resource ' + str(key))
cls._stock[key] = {'type': 'custom', 'filename': filename}
logger.info('%s registered as %s' % (filename, key)) | python | def register(cls, key, filename):
if key in cls._stock:
logger.info('Warning, replacing resource ' + str(key))
cls._stock[key] = {'type': 'custom', 'filename': filename}
logger.info('%s registered as %s' % (filename, key)) | [
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246,703 | alejandroautalan/pygubu | pygubu/stockimage.py | StockImage.register_from_data | def register_from_data(cls, key, format, data):
"""Register a image data using key"""
if key in cls._stock:
logger.info('Warning, replacing resource ' + str(key))
cls._stock[key] = {'type': 'data', 'data': data, 'format': format }
logger.info('%s registered as %s' % ('data', key)) | python | def register_from_data(cls, key, format, data):
if key in cls._stock:
logger.info('Warning, replacing resource ' + str(key))
cls._stock[key] = {'type': 'data', 'data': data, 'format': format }
logger.info('%s registered as %s' % ('data', key)) | [
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246,704 | alejandroautalan/pygubu | pygubu/stockimage.py | StockImage.register_created | def register_created(cls, key, image):
"""Register an already created image using key"""
if key in cls._stock:
logger.info('Warning, replacing resource ' + str(key))
cls._stock[key] = {'type': 'created', 'image': image}
logger.info('%s registered as %s' % ('data', key)) | python | def register_created(cls, key, image):
if key in cls._stock:
logger.info('Warning, replacing resource ' + str(key))
cls._stock[key] = {'type': 'created', 'image': image}
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246,705 | alejandroautalan/pygubu | pygubu/stockimage.py | StockImage._load_image | def _load_image(cls, rkey):
"""Load image from file or return the cached instance."""
v = cls._stock[rkey]
img = None
itype = v['type']
if itype in ('stock', 'data'):
img = tk.PhotoImage(format=v['format'], data=v['data'])
elif itype == 'created':
img = v['image']
else:
img = tk.PhotoImage(file=v['filename'])
cls._cached[rkey] = img
logger.info('Loaded resource %s.' % rkey)
return img | python | def _load_image(cls, rkey):
v = cls._stock[rkey]
img = None
itype = v['type']
if itype in ('stock', 'data'):
img = tk.PhotoImage(format=v['format'], data=v['data'])
elif itype == 'created':
img = v['image']
else:
img = tk.PhotoImage(file=v['filename'])
cls._cached[rkey] = img
logger.info('Loaded resource %s.' % rkey)
return img | [
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246,706 | alejandroautalan/pygubu | pygubu/stockimage.py | StockImage.get | def get(cls, rkey):
"""Get image previously registered with key rkey.
If key not exist, raise StockImageException
"""
if rkey in cls._cached:
logger.info('Resource %s is in cache.' % rkey)
return cls._cached[rkey]
if rkey in cls._stock:
img = cls._load_image(rkey)
return img
else:
raise StockImageException('StockImage: %s not registered.' % rkey) | python | def get(cls, rkey):
if rkey in cls._cached:
logger.info('Resource %s is in cache.' % rkey)
return cls._cached[rkey]
if rkey in cls._stock:
img = cls._load_image(rkey)
return img
else:
raise StockImageException('StockImage: %s not registered.' % rkey) | [
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246,707 | alejandroautalan/pygubu | pygubudesigner/uitreeeditor.py | WidgetsTreeEditor.config_treeview | def config_treeview(self):
"""Sets treeview columns and other params"""
tree = self.treeview
tree.bind('<Double-1>', self.on_treeview_double_click)
tree.bind('<<TreeviewSelect>>', self.on_treeview_select, add='+') | python | def config_treeview(self):
tree = self.treeview
tree.bind('<Double-1>', self.on_treeview_double_click)
tree.bind('<<TreeviewSelect>>', self.on_treeview_select, add='+') | [
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246,708 | alejandroautalan/pygubu | pygubudesigner/uitreeeditor.py | WidgetsTreeEditor.get_toplevel_parent | def get_toplevel_parent(self, treeitem):
"""Returns the top level parent for treeitem."""
tv = self.treeview
toplevel_items = tv.get_children()
item = treeitem
while not (item in toplevel_items):
item = tv.parent(item)
return item | python | def get_toplevel_parent(self, treeitem):
tv = self.treeview
toplevel_items = tv.get_children()
item = treeitem
while not (item in toplevel_items):
item = tv.parent(item)
return item | [
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246,709 | alejandroautalan/pygubu | pygubudesigner/uitreeeditor.py | WidgetsTreeEditor.draw_widget | def draw_widget(self, item):
"""Create a preview of the selected treeview item"""
if item:
self.filter_remove(remember=True)
selected_id = self.treedata[item]['id']
item = self.get_toplevel_parent(item)
widget_id = self.treedata[item]['id']
wclass = self.treedata[item]['class']
xmlnode = self.tree_node_to_xml('', item)
self.previewer.draw(item, widget_id, xmlnode, wclass)
self.previewer.show_selected(item, selected_id)
self.filter_restore() | python | def draw_widget(self, item):
if item:
self.filter_remove(remember=True)
selected_id = self.treedata[item]['id']
item = self.get_toplevel_parent(item)
widget_id = self.treedata[item]['id']
wclass = self.treedata[item]['class']
xmlnode = self.tree_node_to_xml('', item)
self.previewer.draw(item, widget_id, xmlnode, wclass)
self.previewer.show_selected(item, selected_id)
self.filter_restore() | [
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246,710 | alejandroautalan/pygubu | pygubudesigner/uitreeeditor.py | WidgetsTreeEditor.on_treeview_delete_selection | def on_treeview_delete_selection(self, event=None):
"""Removes selected items from treeview"""
tv = self.treeview
selection = tv.selection()
# Need to remove filter
self.filter_remove(remember=True)
toplevel_items = tv.get_children()
parents_to_redraw = set()
for item in selection:
try:
parent = ''
if item not in toplevel_items:
parent = self.get_toplevel_parent(item)
else:
self.previewer.delete(item)
del self.treedata[item]
tv.delete(item)
self.app.set_changed()
if parent:
self._update_max_grid_rc(parent)
parents_to_redraw.add(parent)
self.widget_editor.hide_all()
except tk.TclError:
# Selection of parent and child items ??
# TODO: notify something here
pass
# redraw widgets
for item in parents_to_redraw:
self.draw_widget(item)
# restore filter
self.filter_restore() | python | def on_treeview_delete_selection(self, event=None):
tv = self.treeview
selection = tv.selection()
# Need to remove filter
self.filter_remove(remember=True)
toplevel_items = tv.get_children()
parents_to_redraw = set()
for item in selection:
try:
parent = ''
if item not in toplevel_items:
parent = self.get_toplevel_parent(item)
else:
self.previewer.delete(item)
del self.treedata[item]
tv.delete(item)
self.app.set_changed()
if parent:
self._update_max_grid_rc(parent)
parents_to_redraw.add(parent)
self.widget_editor.hide_all()
except tk.TclError:
# Selection of parent and child items ??
# TODO: notify something here
pass
# redraw widgets
for item in parents_to_redraw:
self.draw_widget(item)
# restore filter
self.filter_restore() | [
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] | 41c8fb37ef973736ec5d68cbe1cd4ecb78712e40 | https://github.com/alejandroautalan/pygubu/blob/41c8fb37ef973736ec5d68cbe1cd4ecb78712e40/pygubudesigner/uitreeeditor.py#L134-L167 |
246,711 | alejandroautalan/pygubu | pygubudesigner/uitreeeditor.py | WidgetsTreeEditor.tree_to_xml | def tree_to_xml(self):
"""Traverses treeview and generates a ElementTree object"""
# Need to remove filter or hidden items will not be saved.
self.filter_remove(remember=True)
tree = self.treeview
root = ET.Element('interface')
items = tree.get_children()
for item in items:
node = self.tree_node_to_xml('', item)
root.append(node)
# restore filter
self.filter_restore()
return ET.ElementTree(root) | python | def tree_to_xml(self):
# Need to remove filter or hidden items will not be saved.
self.filter_remove(remember=True)
tree = self.treeview
root = ET.Element('interface')
items = tree.get_children()
for item in items:
node = self.tree_node_to_xml('', item)
root.append(node)
# restore filter
self.filter_restore()
return ET.ElementTree(root) | [
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246,712 | alejandroautalan/pygubu | pygubudesigner/uitreeeditor.py | WidgetsTreeEditor.tree_node_to_xml | def tree_node_to_xml(self, parent, item):
"""Converts a treeview item and children to xml nodes"""
tree = self.treeview
data = self.treedata[item]
node = data.to_xml_node()
children = tree.get_children(item)
for child in children:
cnode = ET.Element('child')
cwidget = self.tree_node_to_xml(item, child)
cnode.append(cwidget)
node.append(cnode)
return node | python | def tree_node_to_xml(self, parent, item):
tree = self.treeview
data = self.treedata[item]
node = data.to_xml_node()
children = tree.get_children(item)
for child in children:
cnode = ET.Element('child')
cwidget = self.tree_node_to_xml(item, child)
cnode.append(cwidget)
node.append(cnode)
return node | [
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246,713 | alejandroautalan/pygubu | pygubudesigner/uitreeeditor.py | WidgetsTreeEditor._insert_item | def _insert_item(self, root, data, from_file=False):
"""Insert a item on the treeview and fills columns from data"""
tree = self.treeview
treelabel = data.get_id()
row = col = ''
if root != '' and 'layout' in data:
row = data.get_layout_property('row')
col = data.get_layout_property('column')
# fix row position when using copy and paste
# If collision, increase by 1
row_count = self.get_max_row(root)
if not from_file and (row_count > int(row) and int(col) == 0):
row = str(row_count + 1)
data.set_layout_property('row', row)
image = ''
try:
image = StockImage.get('16x16-tk.default')
except StockImageException:
# TODO: notify something here
pass
try:
image = StockImage.get('16x16-{0}'.format(data.get_class()))
except StockImageException:
# TODO: notify something here
pass
values = (data.get_class(), row, col)
item = tree.insert(root, 'end', text=treelabel, values=values,
image=image)
data.attach(self)
self.treedata[item] = data
# Update grid r/c data
self._update_max_grid_rc(root, from_file=True)
self.app.set_changed()
return item | python | def _insert_item(self, root, data, from_file=False):
tree = self.treeview
treelabel = data.get_id()
row = col = ''
if root != '' and 'layout' in data:
row = data.get_layout_property('row')
col = data.get_layout_property('column')
# fix row position when using copy and paste
# If collision, increase by 1
row_count = self.get_max_row(root)
if not from_file and (row_count > int(row) and int(col) == 0):
row = str(row_count + 1)
data.set_layout_property('row', row)
image = ''
try:
image = StockImage.get('16x16-tk.default')
except StockImageException:
# TODO: notify something here
pass
try:
image = StockImage.get('16x16-{0}'.format(data.get_class()))
except StockImageException:
# TODO: notify something here
pass
values = (data.get_class(), row, col)
item = tree.insert(root, 'end', text=treelabel, values=values,
image=image)
data.attach(self)
self.treedata[item] = data
# Update grid r/c data
self._update_max_grid_rc(root, from_file=True)
self.app.set_changed()
return item | [
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246,714 | alejandroautalan/pygubu | pygubudesigner/uitreeeditor.py | WidgetsTreeEditor.copy_to_clipboard | def copy_to_clipboard(self):
"""
Copies selected items to clipboard.
"""
tree = self.treeview
# get the selected item:
selection = tree.selection()
if selection:
self.filter_remove(remember=True)
root = ET.Element('selection')
for item in selection:
node = self.tree_node_to_xml('', item)
root.append(node)
# python2 issue
try:
text = ET.tostring(root, encoding='unicode')
except LookupError:
text = ET.tostring(root, encoding='UTF-8')
tree.clipboard_clear()
tree.clipboard_append(text)
self.filter_restore() | python | def copy_to_clipboard(self):
tree = self.treeview
# get the selected item:
selection = tree.selection()
if selection:
self.filter_remove(remember=True)
root = ET.Element('selection')
for item in selection:
node = self.tree_node_to_xml('', item)
root.append(node)
# python2 issue
try:
text = ET.tostring(root, encoding='unicode')
except LookupError:
text = ET.tostring(root, encoding='UTF-8')
tree.clipboard_clear()
tree.clipboard_append(text)
self.filter_restore() | [
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246,715 | alejandroautalan/pygubu | pygubudesigner/uitreeeditor.py | WidgetsTreeEditor.add_widget | def add_widget(self, wclass):
"""Adds a new item to the treeview."""
tree = self.treeview
# get the selected item:
selected_item = ''
tsel = tree.selection()
if tsel:
selected_item = tsel[0]
# Need to remove filter if set
self.filter_remove()
root = selected_item
# check if the widget can be added at selected point
if not self._validate_add(root, wclass, False):
# if not try to add at item parent level
parent = tree.parent(root)
if parent != root:
if self._validate_add(parent, wclass):
root = parent
else:
return
else:
return
# root item should be set at this point
# setup properties
widget_id = self.get_unique_id(wclass)
data = WidgetDescr(wclass, widget_id)
# setup default values for properties
for pname in builder.CLASS_MAP[wclass].builder.properties:
pdescription = {}
if pname in properties.WIDGET_PROPERTIES:
pdescription = properties.WIDGET_PROPERTIES[pname]
if wclass in pdescription:
pdescription = dict(pdescription, **pdescription[wclass])
default_value = str(pdescription.get('default', ''))
data.set_property(pname, default_value)
# default text for widgets with text prop:
if pname in ('text', 'label'):
data.set_property(pname, widget_id)
#
# default grid properties
#
# is_container = builder.CLASS_MAP[wclass].builder.container
for prop_name in properties.GRID_PROPERTIES:
pdescription = properties.LAYOUT_OPTIONS[prop_name]
if wclass in pdescription:
pdescription = dict(pdescription, **pdescription[wclass])
default_value = str(pdescription.get('default', ''))
data.set_layout_property(prop_name, default_value)
rownum = '0'
if root:
rownum = str(self.get_max_row(root)+1)
data.set_layout_property('row', rownum)
data.set_layout_property('column', '0')
item = self._insert_item(root, data)
# Do redraw
self.draw_widget(item)
# Select and show the item created
tree.after_idle(lambda: tree.selection_set(item))
tree.after_idle(lambda: tree.focus(item))
tree.after_idle(lambda: tree.see(item)) | python | def add_widget(self, wclass):
tree = self.treeview
# get the selected item:
selected_item = ''
tsel = tree.selection()
if tsel:
selected_item = tsel[0]
# Need to remove filter if set
self.filter_remove()
root = selected_item
# check if the widget can be added at selected point
if not self._validate_add(root, wclass, False):
# if not try to add at item parent level
parent = tree.parent(root)
if parent != root:
if self._validate_add(parent, wclass):
root = parent
else:
return
else:
return
# root item should be set at this point
# setup properties
widget_id = self.get_unique_id(wclass)
data = WidgetDescr(wclass, widget_id)
# setup default values for properties
for pname in builder.CLASS_MAP[wclass].builder.properties:
pdescription = {}
if pname in properties.WIDGET_PROPERTIES:
pdescription = properties.WIDGET_PROPERTIES[pname]
if wclass in pdescription:
pdescription = dict(pdescription, **pdescription[wclass])
default_value = str(pdescription.get('default', ''))
data.set_property(pname, default_value)
# default text for widgets with text prop:
if pname in ('text', 'label'):
data.set_property(pname, widget_id)
#
# default grid properties
#
# is_container = builder.CLASS_MAP[wclass].builder.container
for prop_name in properties.GRID_PROPERTIES:
pdescription = properties.LAYOUT_OPTIONS[prop_name]
if wclass in pdescription:
pdescription = dict(pdescription, **pdescription[wclass])
default_value = str(pdescription.get('default', ''))
data.set_layout_property(prop_name, default_value)
rownum = '0'
if root:
rownum = str(self.get_max_row(root)+1)
data.set_layout_property('row', rownum)
data.set_layout_property('column', '0')
item = self._insert_item(root, data)
# Do redraw
self.draw_widget(item)
# Select and show the item created
tree.after_idle(lambda: tree.selection_set(item))
tree.after_idle(lambda: tree.focus(item))
tree.after_idle(lambda: tree.see(item)) | [
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] | 41c8fb37ef973736ec5d68cbe1cd4ecb78712e40 | https://github.com/alejandroautalan/pygubu/blob/41c8fb37ef973736ec5d68cbe1cd4ecb78712e40/pygubudesigner/uitreeeditor.py#L422-L492 |
246,716 | alejandroautalan/pygubu | pygubudesigner/uitreeeditor.py | WidgetsTreeEditor.load_file | def load_file(self, filename):
"""Load file into treeview"""
self.counter.clear()
# python2 issues
try:
etree = ET.parse(filename)
except ET.ParseError:
parser = ET.XMLParser(encoding='UTF-8')
etree = ET.parse(filename, parser)
eroot = etree.getroot()
self.remove_all()
self.previewer.remove_all()
self.widget_editor.hide_all()
self.previewer.resource_paths.append(os.path.dirname(filename))
for element in eroot:
self.populate_tree('', eroot, element,from_file=True)
children = self.treeview.get_children('')
for child in children:
self.draw_widget(child)
self.previewer.show_selected(None, None) | python | def load_file(self, filename):
self.counter.clear()
# python2 issues
try:
etree = ET.parse(filename)
except ET.ParseError:
parser = ET.XMLParser(encoding='UTF-8')
etree = ET.parse(filename, parser)
eroot = etree.getroot()
self.remove_all()
self.previewer.remove_all()
self.widget_editor.hide_all()
self.previewer.resource_paths.append(os.path.dirname(filename))
for element in eroot:
self.populate_tree('', eroot, element,from_file=True)
children = self.treeview.get_children('')
for child in children:
self.draw_widget(child)
self.previewer.show_selected(None, None) | [
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246,717 | alejandroautalan/pygubu | pygubudesigner/uitreeeditor.py | WidgetsTreeEditor.populate_tree | def populate_tree(self, master, parent, element,from_file=False):
"""Reads xml nodes and populates tree item"""
data = WidgetDescr(None, None)
data.from_xml_node(element)
cname = data.get_class()
uniqueid = self.get_unique_id(cname, data.get_id())
data.set_property('id', uniqueid)
if cname in builder.CLASS_MAP:
pwidget = self._insert_item(master, data,from_file=from_file)
xpath = "./child"
children = element.findall(xpath)
for child in children:
child_object = child.find('./object')
cwidget = self.populate_tree(pwidget, child, child_object,from_file=from_file)
return pwidget
else:
raise Exception('Class "{0}" not mapped'.format(cname)) | python | def populate_tree(self, master, parent, element,from_file=False):
data = WidgetDescr(None, None)
data.from_xml_node(element)
cname = data.get_class()
uniqueid = self.get_unique_id(cname, data.get_id())
data.set_property('id', uniqueid)
if cname in builder.CLASS_MAP:
pwidget = self._insert_item(master, data,from_file=from_file)
xpath = "./child"
children = element.findall(xpath)
for child in children:
child_object = child.find('./object')
cwidget = self.populate_tree(pwidget, child, child_object,from_file=from_file)
return pwidget
else:
raise Exception('Class "{0}" not mapped'.format(cname)) | [
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246,718 | alejandroautalan/pygubu | pygubudesigner/uitreeeditor.py | WidgetsTreeEditor.update_event | def update_event(self, hint, obj):
"""Updates tree colums when itemdata is changed."""
tree = self.treeview
data = obj
item = self.get_item_by_data(obj)
if item:
if data.get_id() != tree.item(item, 'text'):
tree.item(item, text=data.get_id())
# if tree.parent(item) != '' and 'layout' in data:
if tree.parent(item) != '':
row = data.get_layout_property('row')
col = data.get_layout_property('column')
values = tree.item(item, 'values')
if (row != values[1] or col != values[2]):
values = (data.get_class(), row, col)
tree.item(item, values=values)
self.draw_widget(item)
self.app.set_changed() | python | def update_event(self, hint, obj):
tree = self.treeview
data = obj
item = self.get_item_by_data(obj)
if item:
if data.get_id() != tree.item(item, 'text'):
tree.item(item, text=data.get_id())
# if tree.parent(item) != '' and 'layout' in data:
if tree.parent(item) != '':
row = data.get_layout_property('row')
col = data.get_layout_property('column')
values = tree.item(item, 'values')
if (row != values[1] or col != values[2]):
values = (data.get_class(), row, col)
tree.item(item, values=values)
self.draw_widget(item)
self.app.set_changed() | [
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246,719 | alejandroautalan/pygubu | pygubudesigner/uitreeeditor.py | WidgetsTreeEditor._reatach | def _reatach(self):
"""Reinsert the hidden items."""
for item, p, idx in self._detached:
# The item may have been deleted.
if self.treeview.exists(item) and self.treeview.exists(p):
self.treeview.move(item, p, idx)
self._detached = [] | python | def _reatach(self):
for item, p, idx in self._detached:
# The item may have been deleted.
if self.treeview.exists(item) and self.treeview.exists(p):
self.treeview.move(item, p, idx)
self._detached = [] | [
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246,720 | alejandroautalan/pygubu | pygubudesigner/uitreeeditor.py | WidgetsTreeEditor._detach | def _detach(self, item):
"""Hide items from treeview that do not match the search string."""
to_detach = []
children_det = []
children_match = False
match_found = False
value = self.filtervar.get()
txt = self.treeview.item(item, 'text').lower()
if value in txt:
match_found = True
else:
class_txt = self.treedata[item].get_class().lower()
if value in class_txt:
match_found = True
parent = self.treeview.parent(item)
idx = self.treeview.index(item)
children = self.treeview.get_children(item)
if children:
for child in children:
match, detach = self._detach(child)
children_match = children_match | match
if detach:
children_det.extend(detach)
if match_found:
if children_det:
to_detach.extend(children_det)
else:
if children_match:
if children_det:
to_detach.extend(children_det)
else:
to_detach.append((item, parent, idx))
match_found = match_found | children_match
return match_found, to_detach | python | def _detach(self, item):
to_detach = []
children_det = []
children_match = False
match_found = False
value = self.filtervar.get()
txt = self.treeview.item(item, 'text').lower()
if value in txt:
match_found = True
else:
class_txt = self.treedata[item].get_class().lower()
if value in class_txt:
match_found = True
parent = self.treeview.parent(item)
idx = self.treeview.index(item)
children = self.treeview.get_children(item)
if children:
for child in children:
match, detach = self._detach(child)
children_match = children_match | match
if detach:
children_det.extend(detach)
if match_found:
if children_det:
to_detach.extend(children_det)
else:
if children_match:
if children_det:
to_detach.extend(children_det)
else:
to_detach.append((item, parent, idx))
match_found = match_found | children_match
return match_found, to_detach | [
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246,721 | alejandroautalan/pygubu | pygubudesigner/main.py | PygubuUI.load_file | def load_file(self, filename):
"""Load xml into treeview"""
self.tree_editor.load_file(filename)
self.project_name.configure(text=filename)
self.currentfile = filename
self.is_changed = False | python | def load_file(self, filename):
self.tree_editor.load_file(filename)
self.project_name.configure(text=filename)
self.currentfile = filename
self.is_changed = False | [
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246,722 | kensho-technologies/graphql-compiler | graphql_compiler/compiler/ir_lowering_gremlin/__init__.py | lower_ir | def lower_ir(ir_blocks, query_metadata_table, type_equivalence_hints=None):
"""Lower the IR into an IR form that can be represented in Gremlin queries.
Args:
ir_blocks: list of IR blocks to lower into Gremlin-compatible form
query_metadata_table: QueryMetadataTable object containing all metadata collected during
query processing, including location metadata (e.g. which locations
are folded or optional).
type_equivalence_hints: optional dict of GraphQL interface or type -> GraphQL union.
Used as a workaround for GraphQL's lack of support for
inheritance across "types" (i.e. non-interfaces), as well as a
workaround for Gremlin's total lack of inheritance-awareness.
The key-value pairs in the dict specify that the "key" type
is equivalent to the "value" type, i.e. that the GraphQL type or
interface in the key is the most-derived common supertype
of every GraphQL type in the "value" GraphQL union.
Recursive expansion of type equivalence hints is not performed,
and only type-level correctness of this argument is enforced.
See README.md for more details on everything this parameter does.
*****
Be very careful with this option, as bad input here will
lead to incorrect output queries being generated.
*****
Returns:
list of IR blocks suitable for outputting as Gremlin
"""
sanity_check_ir_blocks_from_frontend(ir_blocks, query_metadata_table)
ir_blocks = lower_context_field_existence(ir_blocks, query_metadata_table)
ir_blocks = optimize_boolean_expression_comparisons(ir_blocks)
if type_equivalence_hints:
ir_blocks = lower_coerce_type_block_type_data(ir_blocks, type_equivalence_hints)
ir_blocks = lower_coerce_type_blocks(ir_blocks)
ir_blocks = rewrite_filters_in_optional_blocks(ir_blocks)
ir_blocks = merge_consecutive_filter_clauses(ir_blocks)
ir_blocks = lower_folded_outputs(ir_blocks)
return ir_blocks | python | def lower_ir(ir_blocks, query_metadata_table, type_equivalence_hints=None):
sanity_check_ir_blocks_from_frontend(ir_blocks, query_metadata_table)
ir_blocks = lower_context_field_existence(ir_blocks, query_metadata_table)
ir_blocks = optimize_boolean_expression_comparisons(ir_blocks)
if type_equivalence_hints:
ir_blocks = lower_coerce_type_block_type_data(ir_blocks, type_equivalence_hints)
ir_blocks = lower_coerce_type_blocks(ir_blocks)
ir_blocks = rewrite_filters_in_optional_blocks(ir_blocks)
ir_blocks = merge_consecutive_filter_clauses(ir_blocks)
ir_blocks = lower_folded_outputs(ir_blocks)
return ir_blocks | [
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Args:
ir_blocks: list of IR blocks to lower into Gremlin-compatible form
query_metadata_table: QueryMetadataTable object containing all metadata collected during
query processing, including location metadata (e.g. which locations
are folded or optional).
type_equivalence_hints: optional dict of GraphQL interface or type -> GraphQL union.
Used as a workaround for GraphQL's lack of support for
inheritance across "types" (i.e. non-interfaces), as well as a
workaround for Gremlin's total lack of inheritance-awareness.
The key-value pairs in the dict specify that the "key" type
is equivalent to the "value" type, i.e. that the GraphQL type or
interface in the key is the most-derived common supertype
of every GraphQL type in the "value" GraphQL union.
Recursive expansion of type equivalence hints is not performed,
and only type-level correctness of this argument is enforced.
See README.md for more details on everything this parameter does.
*****
Be very careful with this option, as bad input here will
lead to incorrect output queries being generated.
*****
Returns:
list of IR blocks suitable for outputting as Gremlin | [
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246,723 | kensho-technologies/graphql-compiler | graphql_compiler/compiler/ir_lowering_gremlin/ir_lowering.py | lower_coerce_type_block_type_data | def lower_coerce_type_block_type_data(ir_blocks, type_equivalence_hints):
"""Rewrite CoerceType blocks to explicitly state which types are allowed in the coercion."""
allowed_key_type_spec = (GraphQLInterfaceType, GraphQLObjectType)
allowed_value_type_spec = GraphQLUnionType
# Validate that the type_equivalence_hints parameter has correct types.
for key, value in six.iteritems(type_equivalence_hints):
if (not isinstance(key, allowed_key_type_spec) or
not isinstance(value, allowed_value_type_spec)):
msg = (u'Invalid type equivalence hints received! Hint {} ({}) -> {} ({}) '
u'was unexpected, expected a hint in the form '
u'GraphQLInterfaceType -> GraphQLUnionType or '
u'GraphQLObjectType -> GraphQLUnionType'.format(key.name, str(type(key)),
value.name, str(type(value))))
raise GraphQLCompilationError(msg)
# CoerceType blocks only know the name of the type to which they coerce,
# and not its corresponding GraphQL type object. Convert the type equivalence hints into
# a dict of type name -> set of names of equivalent types, which can be used more readily.
equivalent_type_names = {
key.name: {x.name for x in value.types}
for key, value in six.iteritems(type_equivalence_hints)
}
new_ir_blocks = []
for block in ir_blocks:
new_block = block
if isinstance(block, CoerceType):
target_class = get_only_element_from_collection(block.target_class)
if target_class in equivalent_type_names:
new_block = CoerceType(equivalent_type_names[target_class])
new_ir_blocks.append(new_block)
return new_ir_blocks | python | def lower_coerce_type_block_type_data(ir_blocks, type_equivalence_hints):
allowed_key_type_spec = (GraphQLInterfaceType, GraphQLObjectType)
allowed_value_type_spec = GraphQLUnionType
# Validate that the type_equivalence_hints parameter has correct types.
for key, value in six.iteritems(type_equivalence_hints):
if (not isinstance(key, allowed_key_type_spec) or
not isinstance(value, allowed_value_type_spec)):
msg = (u'Invalid type equivalence hints received! Hint {} ({}) -> {} ({}) '
u'was unexpected, expected a hint in the form '
u'GraphQLInterfaceType -> GraphQLUnionType or '
u'GraphQLObjectType -> GraphQLUnionType'.format(key.name, str(type(key)),
value.name, str(type(value))))
raise GraphQLCompilationError(msg)
# CoerceType blocks only know the name of the type to which they coerce,
# and not its corresponding GraphQL type object. Convert the type equivalence hints into
# a dict of type name -> set of names of equivalent types, which can be used more readily.
equivalent_type_names = {
key.name: {x.name for x in value.types}
for key, value in six.iteritems(type_equivalence_hints)
}
new_ir_blocks = []
for block in ir_blocks:
new_block = block
if isinstance(block, CoerceType):
target_class = get_only_element_from_collection(block.target_class)
if target_class in equivalent_type_names:
new_block = CoerceType(equivalent_type_names[target_class])
new_ir_blocks.append(new_block)
return new_ir_blocks | [
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246,724 | kensho-technologies/graphql-compiler | graphql_compiler/compiler/ir_lowering_gremlin/ir_lowering.py | lower_coerce_type_blocks | def lower_coerce_type_blocks(ir_blocks):
"""Lower CoerceType blocks into Filter blocks with a type-check predicate."""
new_ir_blocks = []
for block in ir_blocks:
new_block = block
if isinstance(block, CoerceType):
predicate = BinaryComposition(
u'contains', Literal(list(block.target_class)), LocalField('@class'))
new_block = Filter(predicate)
new_ir_blocks.append(new_block)
return new_ir_blocks | python | def lower_coerce_type_blocks(ir_blocks):
new_ir_blocks = []
for block in ir_blocks:
new_block = block
if isinstance(block, CoerceType):
predicate = BinaryComposition(
u'contains', Literal(list(block.target_class)), LocalField('@class'))
new_block = Filter(predicate)
new_ir_blocks.append(new_block)
return new_ir_blocks | [
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246,725 | kensho-technologies/graphql-compiler | graphql_compiler/compiler/ir_lowering_gremlin/ir_lowering.py | rewrite_filters_in_optional_blocks | def rewrite_filters_in_optional_blocks(ir_blocks):
"""In optional contexts, add a check for null that allows non-existent optional data through.
Optional traversals in Gremlin represent missing optional data by setting the current vertex
to null until the exit from the optional scope. Therefore, filtering and type coercions
(which should have been lowered into filters by this point) must check for null before
applying their filtering predicates. Since missing optional data isn't filtered,
the new filtering predicate should be "(it == null) || existing_predicate".
Args:
ir_blocks: list of IR blocks to lower into Gremlin-compatible form
Returns:
new list of IR blocks with this lowering step applied
"""
new_ir_blocks = []
optional_context_depth = 0
for block in ir_blocks:
new_block = block
if isinstance(block, CoerceType):
raise AssertionError(u'Found a CoerceType block after all such blocks should have been '
u'lowered to Filter blocks: {}'.format(ir_blocks))
elif isinstance(block, Traverse) and block.optional:
optional_context_depth += 1
elif isinstance(block, Backtrack) and block.optional:
optional_context_depth -= 1
if optional_context_depth < 0:
raise AssertionError(u'Reached negative optional context depth for blocks: '
u'{}'.format(ir_blocks))
elif isinstance(block, Filter) and optional_context_depth > 0:
null_check = BinaryComposition(u'=', LocalField('@this'), NullLiteral)
new_block = Filter(BinaryComposition(u'||', null_check, block.predicate))
else:
pass
new_ir_blocks.append(new_block)
return new_ir_blocks | python | def rewrite_filters_in_optional_blocks(ir_blocks):
new_ir_blocks = []
optional_context_depth = 0
for block in ir_blocks:
new_block = block
if isinstance(block, CoerceType):
raise AssertionError(u'Found a CoerceType block after all such blocks should have been '
u'lowered to Filter blocks: {}'.format(ir_blocks))
elif isinstance(block, Traverse) and block.optional:
optional_context_depth += 1
elif isinstance(block, Backtrack) and block.optional:
optional_context_depth -= 1
if optional_context_depth < 0:
raise AssertionError(u'Reached negative optional context depth for blocks: '
u'{}'.format(ir_blocks))
elif isinstance(block, Filter) and optional_context_depth > 0:
null_check = BinaryComposition(u'=', LocalField('@this'), NullLiteral)
new_block = Filter(BinaryComposition(u'||', null_check, block.predicate))
else:
pass
new_ir_blocks.append(new_block)
return new_ir_blocks | [
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(which should have been lowered into filters by this point) must check for null before
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Args:
ir_blocks: list of IR blocks to lower into Gremlin-compatible form
Returns:
new list of IR blocks with this lowering step applied | [
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246,726 | kensho-technologies/graphql-compiler | graphql_compiler/compiler/ir_lowering_gremlin/ir_lowering.py | lower_folded_outputs | def lower_folded_outputs(ir_blocks):
"""Lower standard folded output fields into GremlinFoldedContextField objects."""
folds, remaining_ir_blocks = extract_folds_from_ir_blocks(ir_blocks)
if not remaining_ir_blocks:
raise AssertionError(u'Expected at least one non-folded block to remain: {} {} '
u'{}'.format(folds, remaining_ir_blocks, ir_blocks))
output_block = remaining_ir_blocks[-1]
if not isinstance(output_block, ConstructResult):
raise AssertionError(u'Expected the last non-folded block to be ConstructResult, '
u'but instead was: {} {} '
u'{}'.format(type(output_block), output_block, ir_blocks))
# Turn folded Filter blocks into GremlinFoldedFilter blocks.
converted_folds = {
base_fold_location.get_location_name()[0]: _convert_folded_blocks(folded_ir_blocks)
for base_fold_location, folded_ir_blocks in six.iteritems(folds)
}
new_output_fields = dict()
for output_name, output_expression in six.iteritems(output_block.fields):
new_output_expression = output_expression
# Turn FoldedContextField expressions into GremlinFoldedContextField ones.
if isinstance(output_expression, FoldedContextField):
# Get the matching folded IR blocks and put them in the new context field.
base_fold_location_name = output_expression.fold_scope_location.get_location_name()[0]
folded_ir_blocks = converted_folds[base_fold_location_name]
new_output_expression = GremlinFoldedContextField(
output_expression.fold_scope_location, folded_ir_blocks,
output_expression.field_type)
new_output_fields[output_name] = new_output_expression
new_ir_blocks = remaining_ir_blocks[:-1]
new_ir_blocks.append(ConstructResult(new_output_fields))
return new_ir_blocks | python | def lower_folded_outputs(ir_blocks):
folds, remaining_ir_blocks = extract_folds_from_ir_blocks(ir_blocks)
if not remaining_ir_blocks:
raise AssertionError(u'Expected at least one non-folded block to remain: {} {} '
u'{}'.format(folds, remaining_ir_blocks, ir_blocks))
output_block = remaining_ir_blocks[-1]
if not isinstance(output_block, ConstructResult):
raise AssertionError(u'Expected the last non-folded block to be ConstructResult, '
u'but instead was: {} {} '
u'{}'.format(type(output_block), output_block, ir_blocks))
# Turn folded Filter blocks into GremlinFoldedFilter blocks.
converted_folds = {
base_fold_location.get_location_name()[0]: _convert_folded_blocks(folded_ir_blocks)
for base_fold_location, folded_ir_blocks in six.iteritems(folds)
}
new_output_fields = dict()
for output_name, output_expression in six.iteritems(output_block.fields):
new_output_expression = output_expression
# Turn FoldedContextField expressions into GremlinFoldedContextField ones.
if isinstance(output_expression, FoldedContextField):
# Get the matching folded IR blocks and put them in the new context field.
base_fold_location_name = output_expression.fold_scope_location.get_location_name()[0]
folded_ir_blocks = converted_folds[base_fold_location_name]
new_output_expression = GremlinFoldedContextField(
output_expression.fold_scope_location, folded_ir_blocks,
output_expression.field_type)
new_output_fields[output_name] = new_output_expression
new_ir_blocks = remaining_ir_blocks[:-1]
new_ir_blocks.append(ConstructResult(new_output_fields))
return new_ir_blocks | [
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246,727 | kensho-technologies/graphql-compiler | graphql_compiler/compiler/ir_lowering_gremlin/ir_lowering.py | GremlinFoldedContextField.validate | def validate(self):
"""Validate that the GremlinFoldedContextField is correctly representable."""
if not isinstance(self.fold_scope_location, FoldScopeLocation):
raise TypeError(u'Expected FoldScopeLocation fold_scope_location, got: {} {}'.format(
type(self.fold_scope_location), self.fold_scope_location))
allowed_block_types = (GremlinFoldedFilter, GremlinFoldedTraverse, Backtrack)
for block in self.folded_ir_blocks:
if not isinstance(block, allowed_block_types):
raise AssertionError(
u'Found invalid block of type {} in folded_ir_blocks: {} '
u'Allowed types are {}.'
.format(type(block), self.folded_ir_blocks, allowed_block_types))
if not isinstance(self.field_type, GraphQLList):
raise ValueError(u'Invalid value of "field_type", expected a list type but got: '
u'{}'.format(self.field_type))
inner_type = strip_non_null_from_type(self.field_type.of_type)
if isinstance(inner_type, GraphQLList):
raise GraphQLCompilationError(
u'Outputting list-valued fields in a @fold context is currently '
u'not supported: {} {}'.format(self.fold_scope_location, self.field_type.of_type)) | python | def validate(self):
if not isinstance(self.fold_scope_location, FoldScopeLocation):
raise TypeError(u'Expected FoldScopeLocation fold_scope_location, got: {} {}'.format(
type(self.fold_scope_location), self.fold_scope_location))
allowed_block_types = (GremlinFoldedFilter, GremlinFoldedTraverse, Backtrack)
for block in self.folded_ir_blocks:
if not isinstance(block, allowed_block_types):
raise AssertionError(
u'Found invalid block of type {} in folded_ir_blocks: {} '
u'Allowed types are {}.'
.format(type(block), self.folded_ir_blocks, allowed_block_types))
if not isinstance(self.field_type, GraphQLList):
raise ValueError(u'Invalid value of "field_type", expected a list type but got: '
u'{}'.format(self.field_type))
inner_type = strip_non_null_from_type(self.field_type.of_type)
if isinstance(inner_type, GraphQLList):
raise GraphQLCompilationError(
u'Outputting list-valued fields in a @fold context is currently '
u'not supported: {} {}'.format(self.fold_scope_location, self.field_type.of_type)) | [
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246,728 | kensho-technologies/graphql-compiler | graphql_compiler/compiler/ir_lowering_gremlin/ir_lowering.py | GremlinFoldedTraverse.from_traverse | def from_traverse(cls, traverse_block):
"""Create a GremlinFoldedTraverse block as a copy of the given Traverse block."""
if isinstance(traverse_block, Traverse):
return cls(traverse_block.direction, traverse_block.edge_name)
else:
raise AssertionError(u'Tried to initialize an instance of GremlinFoldedTraverse '
u'with block of type {}'.format(type(traverse_block))) | python | def from_traverse(cls, traverse_block):
if isinstance(traverse_block, Traverse):
return cls(traverse_block.direction, traverse_block.edge_name)
else:
raise AssertionError(u'Tried to initialize an instance of GremlinFoldedTraverse '
u'with block of type {}'.format(type(traverse_block))) | [
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246,729 | kensho-technologies/graphql-compiler | graphql_compiler/schema_generation/graphql_schema.py | _get_referenced_type_equivalences | def _get_referenced_type_equivalences(graphql_types, type_equivalence_hints):
"""Filter union types with no edges from the type equivalence hints dict."""
referenced_types = set()
for graphql_type in graphql_types.values():
if isinstance(graphql_type, (GraphQLObjectType, GraphQLInterfaceType)):
for _, field in graphql_type.fields.items():
if isinstance(field.type, GraphQLList):
referenced_types.add(field.type.of_type.name)
return {
original: union
for original, union in type_equivalence_hints.items()
if union.name in referenced_types
} | python | def _get_referenced_type_equivalences(graphql_types, type_equivalence_hints):
referenced_types = set()
for graphql_type in graphql_types.values():
if isinstance(graphql_type, (GraphQLObjectType, GraphQLInterfaceType)):
for _, field in graphql_type.fields.items():
if isinstance(field.type, GraphQLList):
referenced_types.add(field.type.of_type.name)
return {
original: union
for original, union in type_equivalence_hints.items()
if union.name in referenced_types
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246,730 | kensho-technologies/graphql-compiler | graphql_compiler/schema_generation/graphql_schema.py | _get_inherited_field_types | def _get_inherited_field_types(class_to_field_type_overrides, schema_graph):
"""Return a dictionary describing the field type overrides in subclasses."""
inherited_field_type_overrides = dict()
for superclass_name, field_type_overrides in class_to_field_type_overrides.items():
for subclass_name in schema_graph.get_subclass_set(superclass_name):
inherited_field_type_overrides.setdefault(subclass_name, dict())
inherited_field_type_overrides[subclass_name].update(field_type_overrides)
return inherited_field_type_overrides | python | def _get_inherited_field_types(class_to_field_type_overrides, schema_graph):
inherited_field_type_overrides = dict()
for superclass_name, field_type_overrides in class_to_field_type_overrides.items():
for subclass_name in schema_graph.get_subclass_set(superclass_name):
inherited_field_type_overrides.setdefault(subclass_name, dict())
inherited_field_type_overrides[subclass_name].update(field_type_overrides)
return inherited_field_type_overrides | [
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246,731 | kensho-technologies/graphql-compiler | graphql_compiler/schema_generation/graphql_schema.py | _validate_overriden_fields_are_not_defined_in_superclasses | def _validate_overriden_fields_are_not_defined_in_superclasses(class_to_field_type_overrides,
schema_graph):
"""Assert that the fields we want to override are not defined in superclasses."""
for class_name, field_type_overrides in six.iteritems(class_to_field_type_overrides):
for superclass_name in schema_graph.get_inheritance_set(class_name):
if superclass_name != class_name:
superclass = schema_graph.get_element_by_class_name(superclass_name)
for field_name in field_type_overrides:
if field_name in superclass.properties:
raise AssertionError(
u'Attempting to override field "{}" from class "{}", but the field is '
u'defined in superclass "{}"'
.format(field_name, class_name, superclass_name)) | python | def _validate_overriden_fields_are_not_defined_in_superclasses(class_to_field_type_overrides,
schema_graph):
for class_name, field_type_overrides in six.iteritems(class_to_field_type_overrides):
for superclass_name in schema_graph.get_inheritance_set(class_name):
if superclass_name != class_name:
superclass = schema_graph.get_element_by_class_name(superclass_name)
for field_name in field_type_overrides:
if field_name in superclass.properties:
raise AssertionError(
u'Attempting to override field "{}" from class "{}", but the field is '
u'defined in superclass "{}"'
.format(field_name, class_name, superclass_name)) | [
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246,732 | kensho-technologies/graphql-compiler | graphql_compiler/schema_generation/graphql_schema.py | _property_descriptor_to_graphql_type | def _property_descriptor_to_graphql_type(property_obj):
"""Return the best GraphQL type representation for an OrientDB property descriptor."""
property_type = property_obj.type_id
scalar_types = {
PROPERTY_TYPE_BOOLEAN_ID: GraphQLBoolean,
PROPERTY_TYPE_DATE_ID: GraphQLDate,
PROPERTY_TYPE_DATETIME_ID: GraphQLDateTime,
PROPERTY_TYPE_DECIMAL_ID: GraphQLDecimal,
PROPERTY_TYPE_DOUBLE_ID: GraphQLFloat,
PROPERTY_TYPE_FLOAT_ID: GraphQLFloat,
PROPERTY_TYPE_INTEGER_ID: GraphQLInt,
PROPERTY_TYPE_STRING_ID: GraphQLString,
}
result = scalar_types.get(property_type, None)
if result:
return result
mapping_types = {
PROPERTY_TYPE_EMBEDDED_SET_ID: GraphQLList,
PROPERTY_TYPE_EMBEDDED_LIST_ID: GraphQLList,
}
wrapping_type = mapping_types.get(property_type, None)
if wrapping_type:
linked_property_obj = property_obj.qualifier
# There are properties that are embedded collections of non-primitive types,
# for example, ProxyEventSet.scalar_parameters.
# The GraphQL compiler does not currently support these.
if linked_property_obj in scalar_types:
return wrapping_type(scalar_types[linked_property_obj])
# We weren't able to represent this property in GraphQL, so we'll hide it instead.
return None | python | def _property_descriptor_to_graphql_type(property_obj):
property_type = property_obj.type_id
scalar_types = {
PROPERTY_TYPE_BOOLEAN_ID: GraphQLBoolean,
PROPERTY_TYPE_DATE_ID: GraphQLDate,
PROPERTY_TYPE_DATETIME_ID: GraphQLDateTime,
PROPERTY_TYPE_DECIMAL_ID: GraphQLDecimal,
PROPERTY_TYPE_DOUBLE_ID: GraphQLFloat,
PROPERTY_TYPE_FLOAT_ID: GraphQLFloat,
PROPERTY_TYPE_INTEGER_ID: GraphQLInt,
PROPERTY_TYPE_STRING_ID: GraphQLString,
}
result = scalar_types.get(property_type, None)
if result:
return result
mapping_types = {
PROPERTY_TYPE_EMBEDDED_SET_ID: GraphQLList,
PROPERTY_TYPE_EMBEDDED_LIST_ID: GraphQLList,
}
wrapping_type = mapping_types.get(property_type, None)
if wrapping_type:
linked_property_obj = property_obj.qualifier
# There are properties that are embedded collections of non-primitive types,
# for example, ProxyEventSet.scalar_parameters.
# The GraphQL compiler does not currently support these.
if linked_property_obj in scalar_types:
return wrapping_type(scalar_types[linked_property_obj])
# We weren't able to represent this property in GraphQL, so we'll hide it instead.
return None | [
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246,733 | kensho-technologies/graphql-compiler | graphql_compiler/schema_generation/graphql_schema.py | _get_union_type_name | def _get_union_type_name(type_names_to_union):
"""Construct a unique union type name based on the type names being unioned."""
if not type_names_to_union:
raise AssertionError(u'Expected a non-empty list of type names to union, received: '
u'{}'.format(type_names_to_union))
return u'Union__' + u'__'.join(sorted(type_names_to_union)) | python | def _get_union_type_name(type_names_to_union):
if not type_names_to_union:
raise AssertionError(u'Expected a non-empty list of type names to union, received: '
u'{}'.format(type_names_to_union))
return u'Union__' + u'__'.join(sorted(type_names_to_union)) | [
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246,734 | kensho-technologies/graphql-compiler | graphql_compiler/schema_generation/graphql_schema.py | _get_fields_for_class | def _get_fields_for_class(schema_graph, graphql_types, field_type_overrides, hidden_classes,
cls_name):
"""Return a dict from field name to GraphQL field type, for the specified graph class."""
properties = schema_graph.get_element_by_class_name(cls_name).properties
# Add leaf GraphQL fields (class properties).
all_properties = {
property_name: _property_descriptor_to_graphql_type(property_obj)
for property_name, property_obj in six.iteritems(properties)
}
result = {
property_name: graphql_representation
for property_name, graphql_representation in six.iteritems(all_properties)
if graphql_representation is not None
}
# Add edge GraphQL fields (edges to other vertex classes).
schema_element = schema_graph.get_element_by_class_name(cls_name)
outbound_edges = (
('out_{}'.format(out_edge_name),
schema_graph.get_element_by_class_name(out_edge_name).properties[
EDGE_DESTINATION_PROPERTY_NAME].qualifier)
for out_edge_name in schema_element.out_connections
)
inbound_edges = (
('in_{}'.format(in_edge_name),
schema_graph.get_element_by_class_name(in_edge_name).properties[
EDGE_SOURCE_PROPERTY_NAME].qualifier)
for in_edge_name in schema_element.in_connections
)
for field_name, to_type_name in chain(outbound_edges, inbound_edges):
edge_endpoint_type_name = None
subclasses = schema_graph.get_subclass_set(to_type_name)
to_type_abstract = schema_graph.get_element_by_class_name(to_type_name).abstract
if not to_type_abstract and len(subclasses) > 1:
# If the edge endpoint type has no subclasses, it can't be coerced into any other type.
# If the edge endpoint type is abstract (an interface type), we can already
# coerce it to the proper type with a GraphQL fragment. However, if the endpoint type
# is non-abstract and has subclasses, we need to return its subclasses as an union type.
# This is because GraphQL fragments cannot be applied on concrete types, and
# GraphQL does not support inheritance of concrete types.
type_names_to_union = [
subclass
for subclass in subclasses
if subclass not in hidden_classes
]
if type_names_to_union:
edge_endpoint_type_name = _get_union_type_name(type_names_to_union)
else:
if to_type_name not in hidden_classes:
edge_endpoint_type_name = to_type_name
if edge_endpoint_type_name is not None:
# If we decided to not hide this edge due to its endpoint type being non-representable,
# represent the edge field as the GraphQL type List(edge_endpoint_type_name).
result[field_name] = GraphQLList(graphql_types[edge_endpoint_type_name])
for field_name, field_type in six.iteritems(field_type_overrides):
if field_name not in result:
raise AssertionError(u'Attempting to override field "{}" from class "{}", but the '
u'class does not contain said field'.format(field_name, cls_name))
else:
result[field_name] = field_type
return result | python | def _get_fields_for_class(schema_graph, graphql_types, field_type_overrides, hidden_classes,
cls_name):
properties = schema_graph.get_element_by_class_name(cls_name).properties
# Add leaf GraphQL fields (class properties).
all_properties = {
property_name: _property_descriptor_to_graphql_type(property_obj)
for property_name, property_obj in six.iteritems(properties)
}
result = {
property_name: graphql_representation
for property_name, graphql_representation in six.iteritems(all_properties)
if graphql_representation is not None
}
# Add edge GraphQL fields (edges to other vertex classes).
schema_element = schema_graph.get_element_by_class_name(cls_name)
outbound_edges = (
('out_{}'.format(out_edge_name),
schema_graph.get_element_by_class_name(out_edge_name).properties[
EDGE_DESTINATION_PROPERTY_NAME].qualifier)
for out_edge_name in schema_element.out_connections
)
inbound_edges = (
('in_{}'.format(in_edge_name),
schema_graph.get_element_by_class_name(in_edge_name).properties[
EDGE_SOURCE_PROPERTY_NAME].qualifier)
for in_edge_name in schema_element.in_connections
)
for field_name, to_type_name in chain(outbound_edges, inbound_edges):
edge_endpoint_type_name = None
subclasses = schema_graph.get_subclass_set(to_type_name)
to_type_abstract = schema_graph.get_element_by_class_name(to_type_name).abstract
if not to_type_abstract and len(subclasses) > 1:
# If the edge endpoint type has no subclasses, it can't be coerced into any other type.
# If the edge endpoint type is abstract (an interface type), we can already
# coerce it to the proper type with a GraphQL fragment. However, if the endpoint type
# is non-abstract and has subclasses, we need to return its subclasses as an union type.
# This is because GraphQL fragments cannot be applied on concrete types, and
# GraphQL does not support inheritance of concrete types.
type_names_to_union = [
subclass
for subclass in subclasses
if subclass not in hidden_classes
]
if type_names_to_union:
edge_endpoint_type_name = _get_union_type_name(type_names_to_union)
else:
if to_type_name not in hidden_classes:
edge_endpoint_type_name = to_type_name
if edge_endpoint_type_name is not None:
# If we decided to not hide this edge due to its endpoint type being non-representable,
# represent the edge field as the GraphQL type List(edge_endpoint_type_name).
result[field_name] = GraphQLList(graphql_types[edge_endpoint_type_name])
for field_name, field_type in six.iteritems(field_type_overrides):
if field_name not in result:
raise AssertionError(u'Attempting to override field "{}" from class "{}", but the '
u'class does not contain said field'.format(field_name, cls_name))
else:
result[field_name] = field_type
return result | [
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246,735 | kensho-technologies/graphql-compiler | graphql_compiler/schema_generation/graphql_schema.py | _create_field_specification | def _create_field_specification(schema_graph, graphql_types, field_type_overrides,
hidden_classes, cls_name):
"""Return a function that specifies the fields present on the given type."""
def field_maker_func():
"""Create and return the fields for the given GraphQL type."""
result = EXTENDED_META_FIELD_DEFINITIONS.copy()
result.update(OrderedDict([
(name, GraphQLField(value))
for name, value in sorted(six.iteritems(_get_fields_for_class(
schema_graph, graphql_types, field_type_overrides, hidden_classes, cls_name)),
key=lambda x: x[0])
]))
return result
return field_maker_func | python | def _create_field_specification(schema_graph, graphql_types, field_type_overrides,
hidden_classes, cls_name):
def field_maker_func():
"""Create and return the fields for the given GraphQL type."""
result = EXTENDED_META_FIELD_DEFINITIONS.copy()
result.update(OrderedDict([
(name, GraphQLField(value))
for name, value in sorted(six.iteritems(_get_fields_for_class(
schema_graph, graphql_types, field_type_overrides, hidden_classes, cls_name)),
key=lambda x: x[0])
]))
return result
return field_maker_func | [
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246,736 | kensho-technologies/graphql-compiler | graphql_compiler/schema_generation/graphql_schema.py | _create_interface_specification | def _create_interface_specification(schema_graph, graphql_types, hidden_classes, cls_name):
"""Return a function that specifies the interfaces implemented by the given type."""
def interface_spec():
"""Return a list of GraphQL interface types implemented by the type named 'cls_name'."""
abstract_inheritance_set = (
superclass_name
for superclass_name in sorted(list(schema_graph.get_inheritance_set(cls_name)))
if (superclass_name not in hidden_classes and
schema_graph.get_element_by_class_name(superclass_name).abstract)
)
return [
graphql_types[x]
for x in abstract_inheritance_set
if x not in hidden_classes
]
return interface_spec | python | def _create_interface_specification(schema_graph, graphql_types, hidden_classes, cls_name):
def interface_spec():
"""Return a list of GraphQL interface types implemented by the type named 'cls_name'."""
abstract_inheritance_set = (
superclass_name
for superclass_name in sorted(list(schema_graph.get_inheritance_set(cls_name)))
if (superclass_name not in hidden_classes and
schema_graph.get_element_by_class_name(superclass_name).abstract)
)
return [
graphql_types[x]
for x in abstract_inheritance_set
if x not in hidden_classes
]
return interface_spec | [
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246,737 | kensho-technologies/graphql-compiler | graphql_compiler/schema_generation/graphql_schema.py | _create_union_types_specification | def _create_union_types_specification(schema_graph, graphql_types, hidden_classes, base_name):
"""Return a function that gives the types in the union type rooted at base_name."""
# When edges point to vertices of type base_name, and base_name is both non-abstract and
# has subclasses, we need to represent the edge endpoint type with a union type based on
# base_name and its subclasses. This function calculates what types that union should include.
def types_spec():
"""Return a list of GraphQL types that this class' corresponding union type includes."""
return [
graphql_types[x]
for x in sorted(list(schema_graph.get_subclass_set(base_name)))
if x not in hidden_classes
]
return types_spec | python | def _create_union_types_specification(schema_graph, graphql_types, hidden_classes, base_name):
# When edges point to vertices of type base_name, and base_name is both non-abstract and
# has subclasses, we need to represent the edge endpoint type with a union type based on
# base_name and its subclasses. This function calculates what types that union should include.
def types_spec():
"""Return a list of GraphQL types that this class' corresponding union type includes."""
return [
graphql_types[x]
for x in sorted(list(schema_graph.get_subclass_set(base_name)))
if x not in hidden_classes
]
return types_spec | [
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246,738 | kensho-technologies/graphql-compiler | graphql_compiler/schema_generation/graphql_schema.py | get_graphql_schema_from_schema_graph | def get_graphql_schema_from_schema_graph(schema_graph, class_to_field_type_overrides,
hidden_classes):
"""Return a GraphQL schema object corresponding to the schema of the given schema graph.
Args:
schema_graph: SchemaGraph
class_to_field_type_overrides: dict, class name -> {field name -> field type},
(string -> {string -> GraphQLType}). Used to override the
type of a field in the class where it's first defined and all
the class's subclasses.
hidden_classes: set of strings, classes to not include in the GraphQL schema.
Returns:
tuple of (GraphQL schema object, GraphQL type equivalence hints dict).
The tuple is of type (GraphQLSchema, {GraphQLObjectType -> GraphQLUnionType}).
"""
_validate_overriden_fields_are_not_defined_in_superclasses(class_to_field_type_overrides,
schema_graph)
# The field types of subclasses must also be overridden.
# Remember that the result returned by get_subclass_set(class_name) includes class_name itself.
inherited_field_type_overrides = _get_inherited_field_types(class_to_field_type_overrides,
schema_graph)
# We remove the base vertex class from the schema if it has no properties.
# If it has no properties, it's meaningless and makes the schema less syntactically sweet.
if not schema_graph.get_element_by_class_name(ORIENTDB_BASE_VERTEX_CLASS_NAME).properties:
hidden_classes.add(ORIENTDB_BASE_VERTEX_CLASS_NAME)
graphql_types = OrderedDict()
type_equivalence_hints = OrderedDict()
# For each vertex class, construct its analogous GraphQL type representation.
for vertex_cls_name in sorted(schema_graph.vertex_class_names):
vertex_cls = schema_graph.get_element_by_class_name(vertex_cls_name)
if vertex_cls_name in hidden_classes:
continue
inherited_field_type_overrides.setdefault(vertex_cls_name, dict())
field_type_overrides = inherited_field_type_overrides[vertex_cls_name]
# We have to use delayed type binding here, because some of the type references
# are circular: if an edge connects vertices of types A and B, then
# GraphQL type A has a List[B] field, and type B has a List[A] field.
# To avoid the circular dependency, GraphQL allows us to initialize the types
# initially without their field information, and fill in their field information
# later using a lambda function as the second argument to GraphQLObjectType.
# This lambda function will be called on each type after all types are created
# in their initial blank state.
#
# However, 'cls_name' is a variable that would not be correctly bound
# if we naively tried to construct a lambda in-place, because Python lambdas
# are not closures. Instead, call a function with 'cls_name' as an argument,
# and have that function construct and return the required lambda.
field_specification_lambda = _create_field_specification(
schema_graph, graphql_types, field_type_overrides, hidden_classes, vertex_cls_name)
# Abstract classes are interfaces, concrete classes are object types.
current_graphql_type = None
if vertex_cls.abstract:
# "fields" is a kwarg in the interface constructor, even though
# it's a positional arg in the object type constructor.
current_graphql_type = GraphQLInterfaceType(vertex_cls_name,
fields=field_specification_lambda)
else:
# For similar reasons as the field_specification_lambda,
# we need to create an interface specification lambda function that
# specifies the interfaces implemented by this type.
interface_specification_lambda = _create_interface_specification(
schema_graph, graphql_types, hidden_classes, vertex_cls_name)
# N.B.: Ignore the "is_type_of" argument below, it is simply a circumvention of
# a sanity check inside the GraphQL library. The library assumes that we'll use
# its execution system, so it complains that we don't provide a means to
# differentiate between different implementations of the same interface.
# We don't care, because we compile the GraphQL query to a database query.
current_graphql_type = GraphQLObjectType(vertex_cls_name,
field_specification_lambda,
interfaces=interface_specification_lambda,
is_type_of=lambda: None)
graphql_types[vertex_cls_name] = current_graphql_type
# For each vertex class, construct all union types representations.
for vertex_cls_name in sorted(schema_graph.vertex_class_names):
vertex_cls = schema_graph.get_element_by_class_name(vertex_cls_name)
if vertex_cls_name in hidden_classes:
continue
vertex_cls_subclasses = schema_graph.get_subclass_set(vertex_cls_name)
if not vertex_cls.abstract and len(vertex_cls_subclasses) > 1:
# In addition to creating this class' corresponding GraphQL type, we'll need a
# union type to represent it when it appears as the endpoint of an edge.
union_type_name = _get_union_type_name(vertex_cls_subclasses)
# For similar reasons as the field_specification_lambda,
# we need to create a union type specification lambda function that specifies
# the types that this union type is composed of.
type_specification_lambda = _create_union_types_specification(
schema_graph, graphql_types, hidden_classes, vertex_cls_name)
union_type = GraphQLUnionType(union_type_name, types=type_specification_lambda)
graphql_types[union_type_name] = union_type
type_equivalence_hints[graphql_types[vertex_cls_name]] = union_type
# Include all abstract non-vertex classes whose only non-abstract subclasses are vertices.
for non_graph_cls_name in sorted(schema_graph.non_graph_class_names):
if non_graph_cls_name in hidden_classes:
continue
if not schema_graph.get_element_by_class_name(non_graph_cls_name).abstract:
continue
cls_subclasses = schema_graph.get_subclass_set(non_graph_cls_name)
# No need to add the possible abstract class if it doesn't have subclasses besides itself.
if len(cls_subclasses) > 1:
all_non_abstract_subclasses_are_vertices = True
# Check all non-abstract subclasses are vertices.
for subclass_name in cls_subclasses:
subclass = schema_graph.get_element_by_class_name(subclass_name)
if subclass_name != non_graph_cls_name:
if not subclass.abstract and not subclass.is_vertex:
all_non_abstract_subclasses_are_vertices = False
break
if all_non_abstract_subclasses_are_vertices:
# Add abstract class as an interface.
inherited_field_type_overrides.setdefault(non_graph_cls_name, dict())
field_type_overrides = inherited_field_type_overrides[non_graph_cls_name]
field_specification_lambda = _create_field_specification(
schema_graph, graphql_types, field_type_overrides, hidden_classes,
non_graph_cls_name)
graphql_type = GraphQLInterfaceType(non_graph_cls_name,
fields=field_specification_lambda)
graphql_types[non_graph_cls_name] = graphql_type
if not graphql_types:
raise EmptySchemaError(u'After evaluating all subclasses of V, we were not able to find '
u'visible schema data to import into the GraphQL schema object')
# Create the root query GraphQL type. Consists of all non-union classes, i.e.
# all non-abstract classes (as GraphQL types) and all abstract classes (as GraphQL interfaces).
RootSchemaQuery = GraphQLObjectType('RootSchemaQuery', OrderedDict([
(name, GraphQLField(value))
for name, value in sorted(six.iteritems(graphql_types), key=lambda x: x[0])
if not isinstance(value, GraphQLUnionType)
]))
schema = GraphQLSchema(RootSchemaQuery, directives=DIRECTIVES)
# Note that the GraphQLSchema reconstructs the set of types in the schema by recursively
# searching through the fields of the RootSchemaQuery. Since union types can only appear in the
# fields of other types as edges, union types with no in or out edges will not appear in the
# schema. Therefore, we remove these unions and their keys from the type equivalence hints.
return schema, _get_referenced_type_equivalences(graphql_types,
type_equivalence_hints) | python | def get_graphql_schema_from_schema_graph(schema_graph, class_to_field_type_overrides,
hidden_classes):
_validate_overriden_fields_are_not_defined_in_superclasses(class_to_field_type_overrides,
schema_graph)
# The field types of subclasses must also be overridden.
# Remember that the result returned by get_subclass_set(class_name) includes class_name itself.
inherited_field_type_overrides = _get_inherited_field_types(class_to_field_type_overrides,
schema_graph)
# We remove the base vertex class from the schema if it has no properties.
# If it has no properties, it's meaningless and makes the schema less syntactically sweet.
if not schema_graph.get_element_by_class_name(ORIENTDB_BASE_VERTEX_CLASS_NAME).properties:
hidden_classes.add(ORIENTDB_BASE_VERTEX_CLASS_NAME)
graphql_types = OrderedDict()
type_equivalence_hints = OrderedDict()
# For each vertex class, construct its analogous GraphQL type representation.
for vertex_cls_name in sorted(schema_graph.vertex_class_names):
vertex_cls = schema_graph.get_element_by_class_name(vertex_cls_name)
if vertex_cls_name in hidden_classes:
continue
inherited_field_type_overrides.setdefault(vertex_cls_name, dict())
field_type_overrides = inherited_field_type_overrides[vertex_cls_name]
# We have to use delayed type binding here, because some of the type references
# are circular: if an edge connects vertices of types A and B, then
# GraphQL type A has a List[B] field, and type B has a List[A] field.
# To avoid the circular dependency, GraphQL allows us to initialize the types
# initially without their field information, and fill in their field information
# later using a lambda function as the second argument to GraphQLObjectType.
# This lambda function will be called on each type after all types are created
# in their initial blank state.
#
# However, 'cls_name' is a variable that would not be correctly bound
# if we naively tried to construct a lambda in-place, because Python lambdas
# are not closures. Instead, call a function with 'cls_name' as an argument,
# and have that function construct and return the required lambda.
field_specification_lambda = _create_field_specification(
schema_graph, graphql_types, field_type_overrides, hidden_classes, vertex_cls_name)
# Abstract classes are interfaces, concrete classes are object types.
current_graphql_type = None
if vertex_cls.abstract:
# "fields" is a kwarg in the interface constructor, even though
# it's a positional arg in the object type constructor.
current_graphql_type = GraphQLInterfaceType(vertex_cls_name,
fields=field_specification_lambda)
else:
# For similar reasons as the field_specification_lambda,
# we need to create an interface specification lambda function that
# specifies the interfaces implemented by this type.
interface_specification_lambda = _create_interface_specification(
schema_graph, graphql_types, hidden_classes, vertex_cls_name)
# N.B.: Ignore the "is_type_of" argument below, it is simply a circumvention of
# a sanity check inside the GraphQL library. The library assumes that we'll use
# its execution system, so it complains that we don't provide a means to
# differentiate between different implementations of the same interface.
# We don't care, because we compile the GraphQL query to a database query.
current_graphql_type = GraphQLObjectType(vertex_cls_name,
field_specification_lambda,
interfaces=interface_specification_lambda,
is_type_of=lambda: None)
graphql_types[vertex_cls_name] = current_graphql_type
# For each vertex class, construct all union types representations.
for vertex_cls_name in sorted(schema_graph.vertex_class_names):
vertex_cls = schema_graph.get_element_by_class_name(vertex_cls_name)
if vertex_cls_name in hidden_classes:
continue
vertex_cls_subclasses = schema_graph.get_subclass_set(vertex_cls_name)
if not vertex_cls.abstract and len(vertex_cls_subclasses) > 1:
# In addition to creating this class' corresponding GraphQL type, we'll need a
# union type to represent it when it appears as the endpoint of an edge.
union_type_name = _get_union_type_name(vertex_cls_subclasses)
# For similar reasons as the field_specification_lambda,
# we need to create a union type specification lambda function that specifies
# the types that this union type is composed of.
type_specification_lambda = _create_union_types_specification(
schema_graph, graphql_types, hidden_classes, vertex_cls_name)
union_type = GraphQLUnionType(union_type_name, types=type_specification_lambda)
graphql_types[union_type_name] = union_type
type_equivalence_hints[graphql_types[vertex_cls_name]] = union_type
# Include all abstract non-vertex classes whose only non-abstract subclasses are vertices.
for non_graph_cls_name in sorted(schema_graph.non_graph_class_names):
if non_graph_cls_name in hidden_classes:
continue
if not schema_graph.get_element_by_class_name(non_graph_cls_name).abstract:
continue
cls_subclasses = schema_graph.get_subclass_set(non_graph_cls_name)
# No need to add the possible abstract class if it doesn't have subclasses besides itself.
if len(cls_subclasses) > 1:
all_non_abstract_subclasses_are_vertices = True
# Check all non-abstract subclasses are vertices.
for subclass_name in cls_subclasses:
subclass = schema_graph.get_element_by_class_name(subclass_name)
if subclass_name != non_graph_cls_name:
if not subclass.abstract and not subclass.is_vertex:
all_non_abstract_subclasses_are_vertices = False
break
if all_non_abstract_subclasses_are_vertices:
# Add abstract class as an interface.
inherited_field_type_overrides.setdefault(non_graph_cls_name, dict())
field_type_overrides = inherited_field_type_overrides[non_graph_cls_name]
field_specification_lambda = _create_field_specification(
schema_graph, graphql_types, field_type_overrides, hidden_classes,
non_graph_cls_name)
graphql_type = GraphQLInterfaceType(non_graph_cls_name,
fields=field_specification_lambda)
graphql_types[non_graph_cls_name] = graphql_type
if not graphql_types:
raise EmptySchemaError(u'After evaluating all subclasses of V, we were not able to find '
u'visible schema data to import into the GraphQL schema object')
# Create the root query GraphQL type. Consists of all non-union classes, i.e.
# all non-abstract classes (as GraphQL types) and all abstract classes (as GraphQL interfaces).
RootSchemaQuery = GraphQLObjectType('RootSchemaQuery', OrderedDict([
(name, GraphQLField(value))
for name, value in sorted(six.iteritems(graphql_types), key=lambda x: x[0])
if not isinstance(value, GraphQLUnionType)
]))
schema = GraphQLSchema(RootSchemaQuery, directives=DIRECTIVES)
# Note that the GraphQLSchema reconstructs the set of types in the schema by recursively
# searching through the fields of the RootSchemaQuery. Since union types can only appear in the
# fields of other types as edges, union types with no in or out edges will not appear in the
# schema. Therefore, we remove these unions and their keys from the type equivalence hints.
return schema, _get_referenced_type_equivalences(graphql_types,
type_equivalence_hints) | [
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schema_graph: SchemaGraph
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(string -> {string -> GraphQLType}). Used to override the
type of a field in the class where it's first defined and all
the class's subclasses.
hidden_classes: set of strings, classes to not include in the GraphQL schema.
Returns:
tuple of (GraphQL schema object, GraphQL type equivalence hints dict).
The tuple is of type (GraphQLSchema, {GraphQLObjectType -> GraphQLUnionType}). | [
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246,739 | kensho-technologies/graphql-compiler | graphql_compiler/compiler/workarounds/orientdb_eval_scheduling.py | workaround_lowering_pass | def workaround_lowering_pass(ir_blocks, query_metadata_table):
"""Extract locations from TernaryConditionals and rewrite their Filter blocks as necessary."""
new_ir_blocks = []
for block in ir_blocks:
if isinstance(block, Filter):
new_block = _process_filter_block(query_metadata_table, block)
else:
new_block = block
new_ir_blocks.append(new_block)
return new_ir_blocks | python | def workaround_lowering_pass(ir_blocks, query_metadata_table):
new_ir_blocks = []
for block in ir_blocks:
if isinstance(block, Filter):
new_block = _process_filter_block(query_metadata_table, block)
else:
new_block = block
new_ir_blocks.append(new_block)
return new_ir_blocks | [
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246,740 | kensho-technologies/graphql-compiler | graphql_compiler/compiler/workarounds/orientdb_eval_scheduling.py | _process_filter_block | def _process_filter_block(query_metadata_table, block):
"""Rewrite the provided Filter block if necessary."""
# For a given Filter block with BinaryComposition predicate expression X,
# let L be the set of all Locations referenced in any TernaryConditional
# predicate expression enclosed in X.
# For each location l in L, we construct a tautological expression that looks like:
# ((l IS NULL) OR (l IS NOT NULL))
# and then join the original BinaryComposition X with all such expressions with ANDs.
# We set this new BinaryComposition expression as the predicate of the Filter block.
base_predicate = block.predicate
# These variables are used by the visitor functions below.
ternary_conditionals = []
# "problematic_locations" is a list and not a set,
# to preserve ordering and generate a deterministic order of added clauses.
# We expect the maximum size of this list to be a small constant number,
# so the linear "in" operator is really not a concern.
problematic_locations = []
def find_ternary_conditionals(expression):
"""Visitor function that extracts all enclosed TernaryConditional expressions."""
if isinstance(expression, TernaryConditional):
ternary_conditionals.append(expression)
return expression
def extract_locations_visitor(expression):
"""Visitor function that extracts all the problematic locations."""
if isinstance(expression, (ContextField, ContextFieldExistence)):
# We get the location at the vertex, ignoring property fields.
# The vertex-level location is sufficient to work around the OrientDB bug,
# and we want as few location as possible overall.
location_at_vertex = expression.location.at_vertex()
if location_at_vertex not in problematic_locations:
problematic_locations.append(location_at_vertex)
return expression
# We aren't modifying the base predicate itself, just traversing it.
# The returned "updated" value must be the exact same as the original.
return_value = base_predicate.visit_and_update(find_ternary_conditionals)
if return_value is not base_predicate:
raise AssertionError(u'Read-only visitor function "find_ternary_conditionals" '
u'caused state to change: '
u'{} {}'.format(base_predicate, return_value))
for ternary in ternary_conditionals:
# We aren't modifying the ternary itself, just traversing it.
# The returned "updated" value must be the exact same as the original.
return_value = ternary.visit_and_update(extract_locations_visitor)
if return_value is not ternary:
raise AssertionError(u'Read-only visitor function "extract_locations_visitor" '
u'caused state to change: '
u'{} {}'.format(ternary, return_value))
tautologies = [
_create_tautological_expression_for_location(query_metadata_table, location)
for location in problematic_locations
]
if not tautologies:
return block
final_predicate = base_predicate
for tautology in tautologies:
final_predicate = BinaryComposition(u'&&', final_predicate, tautology)
return Filter(final_predicate) | python | def _process_filter_block(query_metadata_table, block):
# For a given Filter block with BinaryComposition predicate expression X,
# let L be the set of all Locations referenced in any TernaryConditional
# predicate expression enclosed in X.
# For each location l in L, we construct a tautological expression that looks like:
# ((l IS NULL) OR (l IS NOT NULL))
# and then join the original BinaryComposition X with all such expressions with ANDs.
# We set this new BinaryComposition expression as the predicate of the Filter block.
base_predicate = block.predicate
# These variables are used by the visitor functions below.
ternary_conditionals = []
# "problematic_locations" is a list and not a set,
# to preserve ordering and generate a deterministic order of added clauses.
# We expect the maximum size of this list to be a small constant number,
# so the linear "in" operator is really not a concern.
problematic_locations = []
def find_ternary_conditionals(expression):
"""Visitor function that extracts all enclosed TernaryConditional expressions."""
if isinstance(expression, TernaryConditional):
ternary_conditionals.append(expression)
return expression
def extract_locations_visitor(expression):
"""Visitor function that extracts all the problematic locations."""
if isinstance(expression, (ContextField, ContextFieldExistence)):
# We get the location at the vertex, ignoring property fields.
# The vertex-level location is sufficient to work around the OrientDB bug,
# and we want as few location as possible overall.
location_at_vertex = expression.location.at_vertex()
if location_at_vertex not in problematic_locations:
problematic_locations.append(location_at_vertex)
return expression
# We aren't modifying the base predicate itself, just traversing it.
# The returned "updated" value must be the exact same as the original.
return_value = base_predicate.visit_and_update(find_ternary_conditionals)
if return_value is not base_predicate:
raise AssertionError(u'Read-only visitor function "find_ternary_conditionals" '
u'caused state to change: '
u'{} {}'.format(base_predicate, return_value))
for ternary in ternary_conditionals:
# We aren't modifying the ternary itself, just traversing it.
# The returned "updated" value must be the exact same as the original.
return_value = ternary.visit_and_update(extract_locations_visitor)
if return_value is not ternary:
raise AssertionError(u'Read-only visitor function "extract_locations_visitor" '
u'caused state to change: '
u'{} {}'.format(ternary, return_value))
tautologies = [
_create_tautological_expression_for_location(query_metadata_table, location)
for location in problematic_locations
]
if not tautologies:
return block
final_predicate = base_predicate
for tautology in tautologies:
final_predicate = BinaryComposition(u'&&', final_predicate, tautology)
return Filter(final_predicate) | [
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] | f6079c6d10f64932f6b3af309b79bcea2123ca8f | https://github.com/kensho-technologies/graphql-compiler/blob/f6079c6d10f64932f6b3af309b79bcea2123ca8f/graphql_compiler/compiler/workarounds/orientdb_eval_scheduling.py#L33-L98 |
246,741 | kensho-technologies/graphql-compiler | graphql_compiler/compiler/workarounds/orientdb_eval_scheduling.py | _create_tautological_expression_for_location | def _create_tautological_expression_for_location(query_metadata_table, location):
"""For a given location, create a BinaryComposition that always evaluates to 'true'."""
location_type = query_metadata_table.get_location_info(location).type
location_exists = BinaryComposition(
u'!=', ContextField(location, location_type), NullLiteral)
location_does_not_exist = BinaryComposition(
u'=', ContextField(location, location_type), NullLiteral)
return BinaryComposition(u'||', location_exists, location_does_not_exist) | python | def _create_tautological_expression_for_location(query_metadata_table, location):
location_type = query_metadata_table.get_location_info(location).type
location_exists = BinaryComposition(
u'!=', ContextField(location, location_type), NullLiteral)
location_does_not_exist = BinaryComposition(
u'=', ContextField(location, location_type), NullLiteral)
return BinaryComposition(u'||', location_exists, location_does_not_exist) | [
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246,742 | kensho-technologies/graphql-compiler | graphql_compiler/compiler/helpers.py | get_only_element_from_collection | def get_only_element_from_collection(one_element_collection):
"""Assert that the collection has exactly one element, then return that element."""
if len(one_element_collection) != 1:
raise AssertionError(u'Expected a collection with exactly one element, but got: {}'
.format(one_element_collection))
return funcy.first(one_element_collection) | python | def get_only_element_from_collection(one_element_collection):
if len(one_element_collection) != 1:
raise AssertionError(u'Expected a collection with exactly one element, but got: {}'
.format(one_element_collection))
return funcy.first(one_element_collection) | [
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246,743 | kensho-technologies/graphql-compiler | graphql_compiler/compiler/helpers.py | get_ast_field_name | def get_ast_field_name(ast):
"""Return the normalized field name for the given AST node."""
replacements = {
# We always rewrite the following field names into their proper underlying counterparts.
TYPENAME_META_FIELD_NAME: '@class'
}
base_field_name = ast.name.value
normalized_name = replacements.get(base_field_name, base_field_name)
return normalized_name | python | def get_ast_field_name(ast):
replacements = {
# We always rewrite the following field names into their proper underlying counterparts.
TYPENAME_META_FIELD_NAME: '@class'
}
base_field_name = ast.name.value
normalized_name = replacements.get(base_field_name, base_field_name)
return normalized_name | [
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246,744 | kensho-technologies/graphql-compiler | graphql_compiler/compiler/helpers.py | get_field_type_from_schema | def get_field_type_from_schema(schema_type, field_name):
"""Return the type of the field in the given type, accounting for field name normalization."""
if field_name == '@class':
return GraphQLString
else:
if field_name not in schema_type.fields:
raise AssertionError(u'Field {} passed validation but was not present on type '
u'{}'.format(field_name, schema_type))
# Validation guarantees that the field must exist in the schema.
return schema_type.fields[field_name].type | python | def get_field_type_from_schema(schema_type, field_name):
if field_name == '@class':
return GraphQLString
else:
if field_name not in schema_type.fields:
raise AssertionError(u'Field {} passed validation but was not present on type '
u'{}'.format(field_name, schema_type))
# Validation guarantees that the field must exist in the schema.
return schema_type.fields[field_name].type | [
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246,745 | kensho-technologies/graphql-compiler | graphql_compiler/compiler/helpers.py | get_vertex_field_type | def get_vertex_field_type(current_schema_type, vertex_field_name):
"""Return the type of the vertex within the specified vertex field name of the given type."""
# According to the schema, the vertex field itself is of type GraphQLList, and this is
# what get_field_type_from_schema returns. We care about what the type *inside* the list is,
# i.e., the type on the other side of the edge (hence .of_type).
# Validation guarantees that the field must exist in the schema.
if not is_vertex_field_name(vertex_field_name):
raise AssertionError(u'Trying to load the vertex field type of a non-vertex field: '
u'{} {}'.format(current_schema_type, vertex_field_name))
raw_field_type = get_field_type_from_schema(current_schema_type, vertex_field_name)
if not isinstance(strip_non_null_from_type(raw_field_type), GraphQLList):
raise AssertionError(u'Found an edge whose schema type was not GraphQLList: '
u'{} {} {}'.format(current_schema_type, vertex_field_name,
raw_field_type))
return raw_field_type.of_type | python | def get_vertex_field_type(current_schema_type, vertex_field_name):
# According to the schema, the vertex field itself is of type GraphQLList, and this is
# what get_field_type_from_schema returns. We care about what the type *inside* the list is,
# i.e., the type on the other side of the edge (hence .of_type).
# Validation guarantees that the field must exist in the schema.
if not is_vertex_field_name(vertex_field_name):
raise AssertionError(u'Trying to load the vertex field type of a non-vertex field: '
u'{} {}'.format(current_schema_type, vertex_field_name))
raw_field_type = get_field_type_from_schema(current_schema_type, vertex_field_name)
if not isinstance(strip_non_null_from_type(raw_field_type), GraphQLList):
raise AssertionError(u'Found an edge whose schema type was not GraphQLList: '
u'{} {} {}'.format(current_schema_type, vertex_field_name,
raw_field_type))
return raw_field_type.of_type | [
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246,746 | kensho-technologies/graphql-compiler | graphql_compiler/compiler/helpers.py | get_edge_direction_and_name | def get_edge_direction_and_name(vertex_field_name):
"""Get the edge direction and name from a non-root vertex field name."""
edge_direction = None
edge_name = None
if vertex_field_name.startswith(OUTBOUND_EDGE_FIELD_PREFIX):
edge_direction = OUTBOUND_EDGE_DIRECTION
edge_name = vertex_field_name[len(OUTBOUND_EDGE_FIELD_PREFIX):]
elif vertex_field_name.startswith(INBOUND_EDGE_FIELD_PREFIX):
edge_direction = INBOUND_EDGE_DIRECTION
edge_name = vertex_field_name[len(INBOUND_EDGE_FIELD_PREFIX):]
else:
raise AssertionError(u'Unreachable condition reached:', vertex_field_name)
validate_safe_string(edge_name)
return edge_direction, edge_name | python | def get_edge_direction_and_name(vertex_field_name):
edge_direction = None
edge_name = None
if vertex_field_name.startswith(OUTBOUND_EDGE_FIELD_PREFIX):
edge_direction = OUTBOUND_EDGE_DIRECTION
edge_name = vertex_field_name[len(OUTBOUND_EDGE_FIELD_PREFIX):]
elif vertex_field_name.startswith(INBOUND_EDGE_FIELD_PREFIX):
edge_direction = INBOUND_EDGE_DIRECTION
edge_name = vertex_field_name[len(INBOUND_EDGE_FIELD_PREFIX):]
else:
raise AssertionError(u'Unreachable condition reached:', vertex_field_name)
validate_safe_string(edge_name)
return edge_direction, edge_name | [
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246,747 | kensho-technologies/graphql-compiler | graphql_compiler/compiler/helpers.py | is_vertex_field_type | def is_vertex_field_type(graphql_type):
"""Return True if the argument is a vertex field type, and False otherwise."""
# This will need to change if we ever support complex embedded types or edge field types.
underlying_type = strip_non_null_from_type(graphql_type)
return isinstance(underlying_type, (GraphQLInterfaceType, GraphQLObjectType, GraphQLUnionType)) | python | def is_vertex_field_type(graphql_type):
# This will need to change if we ever support complex embedded types or edge field types.
underlying_type = strip_non_null_from_type(graphql_type)
return isinstance(underlying_type, (GraphQLInterfaceType, GraphQLObjectType, GraphQLUnionType)) | [
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246,748 | kensho-technologies/graphql-compiler | graphql_compiler/compiler/helpers.py | ensure_unicode_string | def ensure_unicode_string(value):
"""Ensure the value is a string, and return it as unicode."""
if not isinstance(value, six.string_types):
raise TypeError(u'Expected string value, got: {}'.format(value))
return six.text_type(value) | python | def ensure_unicode_string(value):
if not isinstance(value, six.string_types):
raise TypeError(u'Expected string value, got: {}'.format(value))
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246,749 | kensho-technologies/graphql-compiler | graphql_compiler/compiler/helpers.py | get_uniquely_named_objects_by_name | def get_uniquely_named_objects_by_name(object_list):
"""Return dict of name -> object pairs from a list of objects with unique names.
Args:
object_list: list of objects, each X of which has a unique name accessible as X.name.value
Returns:
dict, { X.name.value: X for x in object_list }
If the list is empty or None, returns an empty dict.
"""
if not object_list:
return dict()
result = dict()
for obj in object_list:
name = obj.name.value
if name in result:
raise GraphQLCompilationError(u'Found duplicate object key: '
u'{} {}'.format(name, object_list))
result[name] = obj
return result | python | def get_uniquely_named_objects_by_name(object_list):
if not object_list:
return dict()
result = dict()
for obj in object_list:
name = obj.name.value
if name in result:
raise GraphQLCompilationError(u'Found duplicate object key: '
u'{} {}'.format(name, object_list))
result[name] = obj
return result | [
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246,750 | kensho-technologies/graphql-compiler | graphql_compiler/compiler/helpers.py | validate_safe_string | def validate_safe_string(value):
"""Ensure the provided string does not have illegal characters."""
# The following strings are explicitly allowed, despite having otherwise-illegal chars.
legal_strings_with_special_chars = frozenset({'@rid', '@class', '@this', '%'})
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raise GraphQLCompilationError(u'Encountered illegal characters in string: {}'.format(value)) | python | def validate_safe_string(value):
# The following strings are explicitly allowed, despite having otherwise-illegal chars.
legal_strings_with_special_chars = frozenset({'@rid', '@class', '@this', '%'})
if not isinstance(value, six.string_types):
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246,751 | kensho-technologies/graphql-compiler | graphql_compiler/compiler/helpers.py | validate_edge_direction | def validate_edge_direction(edge_direction):
"""Ensure the provided edge direction is either "in" or "out"."""
if not isinstance(edge_direction, six.string_types):
raise TypeError(u'Expected string edge_direction, got: {} {}'.format(
type(edge_direction), edge_direction))
if edge_direction not in ALLOWED_EDGE_DIRECTIONS:
raise ValueError(u'Unrecognized edge direction: {}'.format(edge_direction)) | python | def validate_edge_direction(edge_direction):
if not isinstance(edge_direction, six.string_types):
raise TypeError(u'Expected string edge_direction, got: {} {}'.format(
type(edge_direction), edge_direction))
if edge_direction not in ALLOWED_EDGE_DIRECTIONS:
raise ValueError(u'Unrecognized edge direction: {}'.format(edge_direction)) | [
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246,752 | kensho-technologies/graphql-compiler | graphql_compiler/compiler/helpers.py | validate_marked_location | def validate_marked_location(location):
"""Validate that a Location object is safe for marking, and not at a field."""
if not isinstance(location, (Location, FoldScopeLocation)):
raise TypeError(u'Expected Location or FoldScopeLocation location, got: {} {}'.format(
type(location).__name__, location))
if location.field is not None:
raise GraphQLCompilationError(u'Cannot mark location at a field: {}'.format(location)) | python | def validate_marked_location(location):
if not isinstance(location, (Location, FoldScopeLocation)):
raise TypeError(u'Expected Location or FoldScopeLocation location, got: {} {}'.format(
type(location).__name__, location))
if location.field is not None:
raise GraphQLCompilationError(u'Cannot mark location at a field: {}'.format(location)) | [
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246,753 | kensho-technologies/graphql-compiler | graphql_compiler/compiler/helpers.py | invert_dict | def invert_dict(invertible_dict):
"""Invert a dict. A dict is invertible if values are unique and hashable."""
inverted = {}
for k, v in six.iteritems(invertible_dict):
if not isinstance(v, Hashable):
raise TypeError(u'Expected an invertible dict, but value at key {} has type {}'.format(
k, type(v).__name__))
if v in inverted:
raise TypeError(u'Expected an invertible dict, but keys '
u'{} and {} map to the same value'.format(
inverted[v], k))
inverted[v] = k
return inverted | python | def invert_dict(invertible_dict):
inverted = {}
for k, v in six.iteritems(invertible_dict):
if not isinstance(v, Hashable):
raise TypeError(u'Expected an invertible dict, but value at key {} has type {}'.format(
k, type(v).__name__))
if v in inverted:
raise TypeError(u'Expected an invertible dict, but keys '
u'{} and {} map to the same value'.format(
inverted[v], k))
inverted[v] = k
return inverted | [
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246,754 | kensho-technologies/graphql-compiler | setup.py | read_file | def read_file(filename):
"""Read package file as text to get name and version"""
# intentionally *not* adding an encoding option to open
# see here:
# https://github.com/pypa/virtualenv/issues/201#issuecomment-3145690
here = os.path.abspath(os.path.dirname(__file__))
with codecs.open(os.path.join(here, 'graphql_compiler', filename), 'r') as f:
return f.read() | python | def read_file(filename):
# intentionally *not* adding an encoding option to open
# see here:
# https://github.com/pypa/virtualenv/issues/201#issuecomment-3145690
here = os.path.abspath(os.path.dirname(__file__))
with codecs.open(os.path.join(here, 'graphql_compiler', filename), 'r') as f:
return f.read() | [
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246,755 | kensho-technologies/graphql-compiler | setup.py | find_version | def find_version():
"""Only define version in one place"""
version_file = read_file('__init__.py')
version_match = re.search(r'^__version__ = ["\']([^"\']*)["\']',
version_file, re.M)
if version_match:
return version_match.group(1)
raise RuntimeError('Unable to find version string.') | python | def find_version():
version_file = read_file('__init__.py')
version_match = re.search(r'^__version__ = ["\']([^"\']*)["\']',
version_file, re.M)
if version_match:
return version_match.group(1)
raise RuntimeError('Unable to find version string.') | [
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246,756 | kensho-technologies/graphql-compiler | setup.py | find_name | def find_name():
"""Only define name in one place"""
name_file = read_file('__init__.py')
name_match = re.search(r'^__package_name__ = ["\']([^"\']*)["\']',
name_file, re.M)
if name_match:
return name_match.group(1)
raise RuntimeError('Unable to find name string.') | python | def find_name():
name_file = read_file('__init__.py')
name_match = re.search(r'^__package_name__ = ["\']([^"\']*)["\']',
name_file, re.M)
if name_match:
return name_match.group(1)
raise RuntimeError('Unable to find name string.') | [
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246,757 | kensho-technologies/graphql-compiler | graphql_compiler/compiler/workarounds/orientdb_class_with_while.py | workaround_type_coercions_in_recursions | def workaround_type_coercions_in_recursions(match_query):
"""Lower CoerceType blocks into Filter blocks within Recurse steps."""
# This step is required to work around an OrientDB bug that causes queries with both
# "while:" and "class:" in the same query location to fail to parse correctly.
#
# This bug is reported upstream: https://github.com/orientechnologies/orientdb/issues/8129
#
# Instead of "class:", we use "INSTANCEOF" in the "where:" clause to get correct behavior.
# However, we don't want to switch all coercions to this format, since the "class:" clause
# provides valuable info to the MATCH query scheduler about how to schedule efficiently.
new_match_traversals = []
for current_traversal in match_query.match_traversals:
new_traversal = []
for match_step in current_traversal:
new_match_step = match_step
has_coerce_type = match_step.coerce_type_block is not None
has_recurse_root = isinstance(match_step.root_block, Recurse)
if has_coerce_type and has_recurse_root:
new_where_block = convert_coerce_type_and_add_to_where_block(
match_step.coerce_type_block, match_step.where_block)
new_match_step = match_step._replace(coerce_type_block=None,
where_block=new_where_block)
new_traversal.append(new_match_step)
new_match_traversals.append(new_traversal)
return match_query._replace(match_traversals=new_match_traversals) | python | def workaround_type_coercions_in_recursions(match_query):
# This step is required to work around an OrientDB bug that causes queries with both
# "while:" and "class:" in the same query location to fail to parse correctly.
#
# This bug is reported upstream: https://github.com/orientechnologies/orientdb/issues/8129
#
# Instead of "class:", we use "INSTANCEOF" in the "where:" clause to get correct behavior.
# However, we don't want to switch all coercions to this format, since the "class:" clause
# provides valuable info to the MATCH query scheduler about how to schedule efficiently.
new_match_traversals = []
for current_traversal in match_query.match_traversals:
new_traversal = []
for match_step in current_traversal:
new_match_step = match_step
has_coerce_type = match_step.coerce_type_block is not None
has_recurse_root = isinstance(match_step.root_block, Recurse)
if has_coerce_type and has_recurse_root:
new_where_block = convert_coerce_type_and_add_to_where_block(
match_step.coerce_type_block, match_step.where_block)
new_match_step = match_step._replace(coerce_type_block=None,
where_block=new_where_block)
new_traversal.append(new_match_step)
new_match_traversals.append(new_traversal)
return match_query._replace(match_traversals=new_match_traversals) | [
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246,758 | kensho-technologies/graphql-compiler | graphql_compiler/tool.py | main | def main():
"""Read a GraphQL query from standard input, and output it pretty-printed to standard output."""
query = ' '.join(sys.stdin.readlines())
sys.stdout.write(pretty_print_graphql(query)) | python | def main():
query = ' '.join(sys.stdin.readlines())
sys.stdout.write(pretty_print_graphql(query)) | [
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246,759 | kensho-technologies/graphql-compiler | graphql_compiler/query_formatting/gremlin_formatting.py | _safe_gremlin_string | def _safe_gremlin_string(value):
"""Sanitize and represent a string argument in Gremlin."""
if not isinstance(value, six.string_types):
if isinstance(value, bytes): # should only happen in py3
value = value.decode('utf-8')
else:
raise GraphQLInvalidArgumentError(u'Attempting to convert a non-string into a string: '
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# Using JSON encoding means that all unicode literals and special chars
# (e.g. newlines and backslashes) are replaced by appropriate escape sequences.
# However, the quoted result is wrapped in double quotes, and $ signs are not escaped,
# so that would allow arbitrary code execution in Gremlin.
# We will therefore turn the double-quoted string into a single-quoted one to avoid this risk.
escaped_and_quoted = json.dumps(value)
# Double-quoted string literals in Gremlin/Groovy allow
# arbitrary code execution via string interpolation and closures.
# To avoid this, we perform the following steps:
# - we strip the wrapping double quotes;
# - we un-escape any double-quotes in the string, by replacing \" with ";
# - we escape any single-quotes in the string, by replacing ' with \';
# - finally, we wrap the string in single quotes.
# http://www.groovy-lang.org/syntax.html#_double_quoted_string
if not escaped_and_quoted[0] == escaped_and_quoted[-1] == '"':
raise AssertionError(u'Unreachable state reached: {} {}'.format(value, escaped_and_quoted))
no_quotes = escaped_and_quoted[1:-1]
re_escaped = no_quotes.replace('\\"', '"').replace('\'', '\\\'')
final_escaped_value = '\'' + re_escaped + '\''
return final_escaped_value | python | def _safe_gremlin_string(value):
if not isinstance(value, six.string_types):
if isinstance(value, bytes): # should only happen in py3
value = value.decode('utf-8')
else:
raise GraphQLInvalidArgumentError(u'Attempting to convert a non-string into a string: '
u'{}'.format(value))
# Using JSON encoding means that all unicode literals and special chars
# (e.g. newlines and backslashes) are replaced by appropriate escape sequences.
# However, the quoted result is wrapped in double quotes, and $ signs are not escaped,
# so that would allow arbitrary code execution in Gremlin.
# We will therefore turn the double-quoted string into a single-quoted one to avoid this risk.
escaped_and_quoted = json.dumps(value)
# Double-quoted string literals in Gremlin/Groovy allow
# arbitrary code execution via string interpolation and closures.
# To avoid this, we perform the following steps:
# - we strip the wrapping double quotes;
# - we un-escape any double-quotes in the string, by replacing \" with ";
# - we escape any single-quotes in the string, by replacing ' with \';
# - finally, we wrap the string in single quotes.
# http://www.groovy-lang.org/syntax.html#_double_quoted_string
if not escaped_and_quoted[0] == escaped_and_quoted[-1] == '"':
raise AssertionError(u'Unreachable state reached: {} {}'.format(value, escaped_and_quoted))
no_quotes = escaped_and_quoted[1:-1]
re_escaped = no_quotes.replace('\\"', '"').replace('\'', '\\\'')
final_escaped_value = '\'' + re_escaped + '\''
return final_escaped_value | [
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246,760 | kensho-technologies/graphql-compiler | graphql_compiler/query_formatting/gremlin_formatting.py | _safe_gremlin_list | def _safe_gremlin_list(inner_type, argument_value):
"""Represent the list of "inner_type" objects in Gremlin form."""
if not isinstance(argument_value, list):
raise GraphQLInvalidArgumentError(u'Attempting to represent a non-list as a list: '
u'{}'.format(argument_value))
stripped_type = strip_non_null_from_type(inner_type)
components = (
_safe_gremlin_argument(stripped_type, x)
for x in argument_value
)
return u'[' + u','.join(components) + u']' | python | def _safe_gremlin_list(inner_type, argument_value):
if not isinstance(argument_value, list):
raise GraphQLInvalidArgumentError(u'Attempting to represent a non-list as a list: '
u'{}'.format(argument_value))
stripped_type = strip_non_null_from_type(inner_type)
components = (
_safe_gremlin_argument(stripped_type, x)
for x in argument_value
)
return u'[' + u','.join(components) + u']' | [
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246,761 | kensho-technologies/graphql-compiler | graphql_compiler/query_formatting/gremlin_formatting.py | _safe_gremlin_argument | def _safe_gremlin_argument(expected_type, argument_value):
"""Return a Gremlin string representing the given argument value."""
if GraphQLString.is_same_type(expected_type):
return _safe_gremlin_string(argument_value)
elif GraphQLID.is_same_type(expected_type):
# IDs can be strings or numbers, but the GraphQL library coerces them to strings.
# We will follow suit and treat them as strings.
if not isinstance(argument_value, six.string_types):
if isinstance(argument_value, bytes): # should only happen in py3
argument_value = argument_value.decode('utf-8')
else:
argument_value = six.text_type(argument_value)
return _safe_gremlin_string(argument_value)
elif GraphQLFloat.is_same_type(expected_type):
return represent_float_as_str(argument_value)
elif GraphQLInt.is_same_type(expected_type):
# Special case: in Python, isinstance(True, int) returns True.
# Safeguard against this with an explicit check against bool type.
if isinstance(argument_value, bool):
raise GraphQLInvalidArgumentError(u'Attempting to represent a non-int as an int: '
u'{}'.format(argument_value))
return type_check_and_str(int, argument_value)
elif GraphQLBoolean.is_same_type(expected_type):
return type_check_and_str(bool, argument_value)
elif GraphQLDecimal.is_same_type(expected_type):
return _safe_gremlin_decimal(argument_value)
elif GraphQLDate.is_same_type(expected_type):
return _safe_gremlin_date_and_datetime(expected_type, (datetime.date,), argument_value)
elif GraphQLDateTime.is_same_type(expected_type):
return _safe_gremlin_date_and_datetime(expected_type,
(datetime.datetime, arrow.Arrow), argument_value)
elif isinstance(expected_type, GraphQLList):
return _safe_gremlin_list(expected_type.of_type, argument_value)
else:
raise AssertionError(u'Could not safely represent the requested GraphQL type: '
u'{} {}'.format(expected_type, argument_value)) | python | def _safe_gremlin_argument(expected_type, argument_value):
if GraphQLString.is_same_type(expected_type):
return _safe_gremlin_string(argument_value)
elif GraphQLID.is_same_type(expected_type):
# IDs can be strings or numbers, but the GraphQL library coerces them to strings.
# We will follow suit and treat them as strings.
if not isinstance(argument_value, six.string_types):
if isinstance(argument_value, bytes): # should only happen in py3
argument_value = argument_value.decode('utf-8')
else:
argument_value = six.text_type(argument_value)
return _safe_gremlin_string(argument_value)
elif GraphQLFloat.is_same_type(expected_type):
return represent_float_as_str(argument_value)
elif GraphQLInt.is_same_type(expected_type):
# Special case: in Python, isinstance(True, int) returns True.
# Safeguard against this with an explicit check against bool type.
if isinstance(argument_value, bool):
raise GraphQLInvalidArgumentError(u'Attempting to represent a non-int as an int: '
u'{}'.format(argument_value))
return type_check_and_str(int, argument_value)
elif GraphQLBoolean.is_same_type(expected_type):
return type_check_and_str(bool, argument_value)
elif GraphQLDecimal.is_same_type(expected_type):
return _safe_gremlin_decimal(argument_value)
elif GraphQLDate.is_same_type(expected_type):
return _safe_gremlin_date_and_datetime(expected_type, (datetime.date,), argument_value)
elif GraphQLDateTime.is_same_type(expected_type):
return _safe_gremlin_date_and_datetime(expected_type,
(datetime.datetime, arrow.Arrow), argument_value)
elif isinstance(expected_type, GraphQLList):
return _safe_gremlin_list(expected_type.of_type, argument_value)
else:
raise AssertionError(u'Could not safely represent the requested GraphQL type: '
u'{} {}'.format(expected_type, argument_value)) | [
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246,762 | kensho-technologies/graphql-compiler | graphql_compiler/query_formatting/gremlin_formatting.py | insert_arguments_into_gremlin_query | def insert_arguments_into_gremlin_query(compilation_result, arguments):
"""Insert the arguments into the compiled Gremlin query to form a complete query.
The GraphQL compiler attempts to use single-quoted string literals ('abc') in Gremlin output.
Double-quoted strings allow inline interpolation with the $ symbol, see here for details:
http://www.groovy-lang.org/syntax.html#all-strings
If the compiler needs to emit a literal '$' character as part of the Gremlin query,
it must be doubled ('$$') to avoid being interpreted as a query parameter.
Args:
compilation_result: a CompilationResult object derived from the GraphQL compiler
arguments: dict, mapping argument name to its value, for every parameter the query expects.
Returns:
string, a Gremlin query with inserted argument data
"""
if compilation_result.language != GREMLIN_LANGUAGE:
raise AssertionError(u'Unexpected query output language: {}'.format(compilation_result))
base_query = compilation_result.query
argument_types = compilation_result.input_metadata
# The arguments are assumed to have already been validated against the query.
sanitized_arguments = {
key: _safe_gremlin_argument(argument_types[key], value)
for key, value in six.iteritems(arguments)
}
return Template(base_query).substitute(sanitized_arguments) | python | def insert_arguments_into_gremlin_query(compilation_result, arguments):
if compilation_result.language != GREMLIN_LANGUAGE:
raise AssertionError(u'Unexpected query output language: {}'.format(compilation_result))
base_query = compilation_result.query
argument_types = compilation_result.input_metadata
# The arguments are assumed to have already been validated against the query.
sanitized_arguments = {
key: _safe_gremlin_argument(argument_types[key], value)
for key, value in six.iteritems(arguments)
}
return Template(base_query).substitute(sanitized_arguments) | [
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The GraphQL compiler attempts to use single-quoted string literals ('abc') in Gremlin output.
Double-quoted strings allow inline interpolation with the $ symbol, see here for details:
http://www.groovy-lang.org/syntax.html#all-strings
If the compiler needs to emit a literal '$' character as part of the Gremlin query,
it must be doubled ('$$') to avoid being interpreted as a query parameter.
Args:
compilation_result: a CompilationResult object derived from the GraphQL compiler
arguments: dict, mapping argument name to its value, for every parameter the query expects.
Returns:
string, a Gremlin query with inserted argument data | [
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246,763 | kensho-technologies/graphql-compiler | graphql_compiler/compiler/emit_match.py | _get_vertex_location_name | def _get_vertex_location_name(location):
"""Get the location name from a location that is expected to point to a vertex."""
mark_name, field_name = location.get_location_name()
if field_name is not None:
raise AssertionError(u'Location unexpectedly pointed to a field: {}'.format(location))
return mark_name | python | def _get_vertex_location_name(location):
mark_name, field_name = location.get_location_name()
if field_name is not None:
raise AssertionError(u'Location unexpectedly pointed to a field: {}'.format(location))
return mark_name | [
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246,764 | kensho-technologies/graphql-compiler | graphql_compiler/compiler/emit_match.py | _first_step_to_match | def _first_step_to_match(match_step):
"""Transform the very first MATCH step into a MATCH query string."""
parts = []
if match_step.root_block is not None:
if not isinstance(match_step.root_block, QueryRoot):
raise AssertionError(u'Expected None or QueryRoot root block, received: '
u'{} {}'.format(match_step.root_block, match_step))
match_step.root_block.validate()
start_class = get_only_element_from_collection(match_step.root_block.start_class)
parts.append(u'class: %s' % (start_class,))
# MATCH steps with a QueryRoot root block shouldn't have a 'coerce_type_block'.
if match_step.coerce_type_block is not None:
raise AssertionError(u'Invalid MATCH step: {}'.format(match_step))
if match_step.where_block:
match_step.where_block.validate()
parts.append(u'where: (%s)' % (match_step.where_block.predicate.to_match(),))
if match_step.as_block is None:
raise AssertionError(u'Found a MATCH step without a corresponding Location. '
u'This should never happen: {}'.format(match_step))
else:
match_step.as_block.validate()
parts.append(u'as: %s' % (_get_vertex_location_name(match_step.as_block.location),))
return u'{{ %s }}' % (u', '.join(parts),) | python | def _first_step_to_match(match_step):
parts = []
if match_step.root_block is not None:
if not isinstance(match_step.root_block, QueryRoot):
raise AssertionError(u'Expected None or QueryRoot root block, received: '
u'{} {}'.format(match_step.root_block, match_step))
match_step.root_block.validate()
start_class = get_only_element_from_collection(match_step.root_block.start_class)
parts.append(u'class: %s' % (start_class,))
# MATCH steps with a QueryRoot root block shouldn't have a 'coerce_type_block'.
if match_step.coerce_type_block is not None:
raise AssertionError(u'Invalid MATCH step: {}'.format(match_step))
if match_step.where_block:
match_step.where_block.validate()
parts.append(u'where: (%s)' % (match_step.where_block.predicate.to_match(),))
if match_step.as_block is None:
raise AssertionError(u'Found a MATCH step without a corresponding Location. '
u'This should never happen: {}'.format(match_step))
else:
match_step.as_block.validate()
parts.append(u'as: %s' % (_get_vertex_location_name(match_step.as_block.location),))
return u'{{ %s }}' % (u', '.join(parts),) | [
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246,765 | kensho-technologies/graphql-compiler | graphql_compiler/compiler/emit_match.py | _represent_match_traversal | def _represent_match_traversal(match_traversal):
"""Emit MATCH query code for an entire MATCH traversal sequence."""
output = []
output.append(_first_step_to_match(match_traversal[0]))
for step in match_traversal[1:]:
output.append(_subsequent_step_to_match(step))
return u''.join(output) | python | def _represent_match_traversal(match_traversal):
output = []
output.append(_first_step_to_match(match_traversal[0]))
for step in match_traversal[1:]:
output.append(_subsequent_step_to_match(step))
return u''.join(output) | [
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246,766 | kensho-technologies/graphql-compiler | graphql_compiler/compiler/emit_match.py | _represent_fold | def _represent_fold(fold_location, fold_ir_blocks):
"""Emit a LET clause corresponding to the IR blocks for a @fold scope."""
start_let_template = u'$%(mark_name)s = %(base_location)s'
traverse_edge_template = u'.%(direction)s("%(edge_name)s")'
base_template = start_let_template + traverse_edge_template
edge_direction, edge_name = fold_location.get_first_folded_edge()
mark_name, _ = fold_location.get_location_name()
base_location_name, _ = fold_location.base_location.get_location_name()
validate_safe_string(mark_name)
validate_safe_string(base_location_name)
validate_safe_string(edge_direction)
validate_safe_string(edge_name)
template_data = {
'mark_name': mark_name,
'base_location': base_location_name,
'direction': edge_direction,
'edge_name': edge_name,
}
final_string = base_template % template_data
for block in fold_ir_blocks:
if isinstance(block, Filter):
final_string += u'[' + block.predicate.to_match() + u']'
elif isinstance(block, Traverse):
template_data = {
'direction': block.direction,
'edge_name': block.edge_name,
}
final_string += traverse_edge_template % template_data
elif isinstance(block, MarkLocation):
# MarkLocation blocks inside a fold do not result in any MATCH output.
pass
else:
raise AssertionError(u'Found an unexpected IR block in the folded IR blocks: '
u'{} {} {}'.format(type(block), block, fold_ir_blocks))
# Workaround for OrientDB's inconsistent return type when filtering a list.
# https://github.com/orientechnologies/orientdb/issues/7811
final_string += '.asList()'
return final_string | python | def _represent_fold(fold_location, fold_ir_blocks):
start_let_template = u'$%(mark_name)s = %(base_location)s'
traverse_edge_template = u'.%(direction)s("%(edge_name)s")'
base_template = start_let_template + traverse_edge_template
edge_direction, edge_name = fold_location.get_first_folded_edge()
mark_name, _ = fold_location.get_location_name()
base_location_name, _ = fold_location.base_location.get_location_name()
validate_safe_string(mark_name)
validate_safe_string(base_location_name)
validate_safe_string(edge_direction)
validate_safe_string(edge_name)
template_data = {
'mark_name': mark_name,
'base_location': base_location_name,
'direction': edge_direction,
'edge_name': edge_name,
}
final_string = base_template % template_data
for block in fold_ir_blocks:
if isinstance(block, Filter):
final_string += u'[' + block.predicate.to_match() + u']'
elif isinstance(block, Traverse):
template_data = {
'direction': block.direction,
'edge_name': block.edge_name,
}
final_string += traverse_edge_template % template_data
elif isinstance(block, MarkLocation):
# MarkLocation blocks inside a fold do not result in any MATCH output.
pass
else:
raise AssertionError(u'Found an unexpected IR block in the folded IR blocks: '
u'{} {} {}'.format(type(block), block, fold_ir_blocks))
# Workaround for OrientDB's inconsistent return type when filtering a list.
# https://github.com/orientechnologies/orientdb/issues/7811
final_string += '.asList()'
return final_string | [
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246,767 | kensho-technologies/graphql-compiler | graphql_compiler/compiler/emit_match.py | _construct_output_to_match | def _construct_output_to_match(output_block):
"""Transform a ConstructResult block into a MATCH query string."""
output_block.validate()
selections = (
u'%s AS `%s`' % (output_block.fields[key].to_match(), key)
for key in sorted(output_block.fields.keys()) # Sort keys for deterministic output order.
)
return u'SELECT %s FROM' % (u', '.join(selections),) | python | def _construct_output_to_match(output_block):
output_block.validate()
selections = (
u'%s AS `%s`' % (output_block.fields[key].to_match(), key)
for key in sorted(output_block.fields.keys()) # Sort keys for deterministic output order.
)
return u'SELECT %s FROM' % (u', '.join(selections),) | [
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246,768 | kensho-technologies/graphql-compiler | graphql_compiler/compiler/emit_match.py | _construct_where_to_match | def _construct_where_to_match(where_block):
"""Transform a Filter block into a MATCH query string."""
if where_block.predicate == TrueLiteral:
raise AssertionError(u'Received WHERE block with TrueLiteral predicate: {}'
.format(where_block))
return u'WHERE ' + where_block.predicate.to_match() | python | def _construct_where_to_match(where_block):
if where_block.predicate == TrueLiteral:
raise AssertionError(u'Received WHERE block with TrueLiteral predicate: {}'
.format(where_block))
return u'WHERE ' + where_block.predicate.to_match() | [
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246,769 | kensho-technologies/graphql-compiler | graphql_compiler/compiler/emit_match.py | emit_code_from_multiple_match_queries | def emit_code_from_multiple_match_queries(match_queries):
"""Return a MATCH query string from a list of MatchQuery namedtuples."""
optional_variable_base_name = '$optional__'
union_variable_name = '$result'
query_data = deque([u'SELECT EXPAND(', union_variable_name, u')', u' LET '])
optional_variables = []
sub_queries = [emit_code_from_single_match_query(match_query)
for match_query in match_queries]
for (i, sub_query) in enumerate(sub_queries):
variable_name = optional_variable_base_name + str(i)
variable_assignment = variable_name + u' = ('
sub_query_end = u'),'
query_data.append(variable_assignment)
query_data.append(sub_query)
query_data.append(sub_query_end)
optional_variables.append(variable_name)
query_data.append(union_variable_name)
query_data.append(u' = UNIONALL(')
query_data.append(u', '.join(optional_variables))
query_data.append(u')')
return u' '.join(query_data) | python | def emit_code_from_multiple_match_queries(match_queries):
optional_variable_base_name = '$optional__'
union_variable_name = '$result'
query_data = deque([u'SELECT EXPAND(', union_variable_name, u')', u' LET '])
optional_variables = []
sub_queries = [emit_code_from_single_match_query(match_query)
for match_query in match_queries]
for (i, sub_query) in enumerate(sub_queries):
variable_name = optional_variable_base_name + str(i)
variable_assignment = variable_name + u' = ('
sub_query_end = u'),'
query_data.append(variable_assignment)
query_data.append(sub_query)
query_data.append(sub_query_end)
optional_variables.append(variable_name)
query_data.append(union_variable_name)
query_data.append(u' = UNIONALL(')
query_data.append(u', '.join(optional_variables))
query_data.append(u')')
return u' '.join(query_data) | [
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246,770 | kensho-technologies/graphql-compiler | graphql_compiler/compiler/emit_match.py | emit_code_from_ir | def emit_code_from_ir(compound_match_query, compiler_metadata):
"""Return a MATCH query string from a CompoundMatchQuery."""
# If the compound match query contains only one match query,
# just call `emit_code_from_single_match_query`
# If there are multiple match queries, construct the query string for each
# individual query and combine them as follows.
#
# SELECT EXPAND($result)
# LET
# $optional__0 = (
# <query_string_0>
# ),
# $optional__1 = (
# <query_string_1>
# ),
# $optional__2 = (
# <query_string_2>
# ),
#
# . . .
#
# $result = UNIONALL($optional__0, $optional__1, . . . )
match_queries = compound_match_query.match_queries
if len(match_queries) == 1:
query_string = emit_code_from_single_match_query(match_queries[0])
elif len(match_queries) > 1:
query_string = emit_code_from_multiple_match_queries(match_queries)
else:
raise AssertionError(u'Received CompoundMatchQuery with an empty list of MatchQueries: '
u'{}'.format(match_queries))
return query_string | python | def emit_code_from_ir(compound_match_query, compiler_metadata):
# If the compound match query contains only one match query,
# just call `emit_code_from_single_match_query`
# If there are multiple match queries, construct the query string for each
# individual query and combine them as follows.
#
# SELECT EXPAND($result)
# LET
# $optional__0 = (
# <query_string_0>
# ),
# $optional__1 = (
# <query_string_1>
# ),
# $optional__2 = (
# <query_string_2>
# ),
#
# . . .
#
# $result = UNIONALL($optional__0, $optional__1, . . . )
match_queries = compound_match_query.match_queries
if len(match_queries) == 1:
query_string = emit_code_from_single_match_query(match_queries[0])
elif len(match_queries) > 1:
query_string = emit_code_from_multiple_match_queries(match_queries)
else:
raise AssertionError(u'Received CompoundMatchQuery with an empty list of MatchQueries: '
u'{}'.format(match_queries))
return query_string | [
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246,771 | kensho-technologies/graphql-compiler | graphql_compiler/schema.py | _serialize_date | def _serialize_date(value):
"""Serialize a Date object to its proper ISO-8601 representation."""
if not isinstance(value, date):
raise ValueError(u'The received object was not a date: '
u'{} {}'.format(type(value), value))
return value.isoformat() | python | def _serialize_date(value):
if not isinstance(value, date):
raise ValueError(u'The received object was not a date: '
u'{} {}'.format(type(value), value))
return value.isoformat() | [
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246,772 | kensho-technologies/graphql-compiler | graphql_compiler/schema.py | _serialize_datetime | def _serialize_datetime(value):
"""Serialize a DateTime object to its proper ISO-8601 representation."""
if not isinstance(value, (datetime, arrow.Arrow)):
raise ValueError(u'The received object was not a datetime: '
u'{} {}'.format(type(value), value))
return value.isoformat() | python | def _serialize_datetime(value):
if not isinstance(value, (datetime, arrow.Arrow)):
raise ValueError(u'The received object was not a datetime: '
u'{} {}'.format(type(value), value))
return value.isoformat() | [
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246,773 | kensho-technologies/graphql-compiler | graphql_compiler/schema.py | _parse_datetime_value | def _parse_datetime_value(value):
"""Deserialize a DateTime object from its proper ISO-8601 representation."""
if value.endswith('Z'):
# Arrow doesn't support the "Z" literal to denote UTC time.
# Strip the "Z" and add an explicit time zone instead.
value = value[:-1] + '+00:00'
return arrow.get(value, 'YYYY-MM-DDTHH:mm:ssZ').datetime | python | def _parse_datetime_value(value):
if value.endswith('Z'):
# Arrow doesn't support the "Z" literal to denote UTC time.
# Strip the "Z" and add an explicit time zone instead.
value = value[:-1] + '+00:00'
return arrow.get(value, 'YYYY-MM-DDTHH:mm:ssZ').datetime | [
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246,774 | kensho-technologies/graphql-compiler | graphql_compiler/schema.py | insert_meta_fields_into_existing_schema | def insert_meta_fields_into_existing_schema(graphql_schema):
"""Add compiler-specific meta-fields into all interfaces and types of the specified schema.
It is preferable to use the EXTENDED_META_FIELD_DEFINITIONS constant above to directly inject
the meta-fields during the initial process of building the schema, as that approach
is more robust. This function does its best to not mutate unexpected definitions, but
may break unexpectedly as the GraphQL standard is extended and the underlying
GraphQL library is updated.
Use this function at your own risk. Don't say you haven't been warned.
Properties added include:
- "_x_count", which allows filtering folds based on the number of elements they capture.
Args:
graphql_schema: GraphQLSchema object describing the schema that is going to be used with
the compiler. N.B.: MUTATED IN-PLACE in this method.
"""
root_type_name = graphql_schema.get_query_type().name
for type_name, type_obj in six.iteritems(graphql_schema.get_type_map()):
if type_name.startswith('__') or type_name == root_type_name:
# Ignore the types that are built into GraphQL itself, as well as the root query type.
continue
if not isinstance(type_obj, (GraphQLObjectType, GraphQLInterfaceType)):
# Ignore definitions that are not interfaces or types.
continue
for meta_field_name, meta_field in six.iteritems(EXTENDED_META_FIELD_DEFINITIONS):
if meta_field_name in type_obj.fields:
raise AssertionError(u'Unexpectedly encountered an existing field named {} while '
u'attempting to add a meta-field of the same name. Make sure '
u'you are not attempting to add meta-fields twice.'
.format(meta_field_name))
type_obj.fields[meta_field_name] = meta_field | python | def insert_meta_fields_into_existing_schema(graphql_schema):
root_type_name = graphql_schema.get_query_type().name
for type_name, type_obj in six.iteritems(graphql_schema.get_type_map()):
if type_name.startswith('__') or type_name == root_type_name:
# Ignore the types that are built into GraphQL itself, as well as the root query type.
continue
if not isinstance(type_obj, (GraphQLObjectType, GraphQLInterfaceType)):
# Ignore definitions that are not interfaces or types.
continue
for meta_field_name, meta_field in six.iteritems(EXTENDED_META_FIELD_DEFINITIONS):
if meta_field_name in type_obj.fields:
raise AssertionError(u'Unexpectedly encountered an existing field named {} while '
u'attempting to add a meta-field of the same name. Make sure '
u'you are not attempting to add meta-fields twice.'
.format(meta_field_name))
type_obj.fields[meta_field_name] = meta_field | [
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Use this function at your own risk. Don't say you haven't been warned.
Properties added include:
- "_x_count", which allows filtering folds based on the number of elements they capture.
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graphql_schema: GraphQLSchema object describing the schema that is going to be used with
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246,775 | kensho-technologies/graphql-compiler | graphql_compiler/compiler/context_helpers.py | validate_context_for_visiting_vertex_field | def validate_context_for_visiting_vertex_field(parent_location, vertex_field_name, context):
"""Ensure that the current context allows for visiting a vertex field."""
if is_in_fold_innermost_scope(context):
raise GraphQLCompilationError(
u'Traversing inside a @fold block after filtering on {} or outputting fields '
u'is not supported! Parent location: {}, vertex field name: {}'
.format(COUNT_META_FIELD_NAME, parent_location, vertex_field_name)) | python | def validate_context_for_visiting_vertex_field(parent_location, vertex_field_name, context):
if is_in_fold_innermost_scope(context):
raise GraphQLCompilationError(
u'Traversing inside a @fold block after filtering on {} or outputting fields '
u'is not supported! Parent location: {}, vertex field name: {}'
.format(COUNT_META_FIELD_NAME, parent_location, vertex_field_name)) | [
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246,776 | kensho-technologies/graphql-compiler | graphql_compiler/query_formatting/graphql_formatting.py | pretty_print_graphql | def pretty_print_graphql(query, use_four_spaces=True):
"""Take a GraphQL query, pretty print it, and return it."""
# Use our custom visitor, which fixes directive argument order
# to get the canonical representation
output = visit(parse(query), CustomPrintingVisitor())
# Using four spaces for indentation makes it easier to edit in
# Python source files.
if use_four_spaces:
return fix_indentation_depth(output)
return output | python | def pretty_print_graphql(query, use_four_spaces=True):
# Use our custom visitor, which fixes directive argument order
# to get the canonical representation
output = visit(parse(query), CustomPrintingVisitor())
# Using four spaces for indentation makes it easier to edit in
# Python source files.
if use_four_spaces:
return fix_indentation_depth(output)
return output | [
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246,777 | kensho-technologies/graphql-compiler | graphql_compiler/query_formatting/graphql_formatting.py | fix_indentation_depth | def fix_indentation_depth(query):
"""Make indentation use 4 spaces, rather than the 2 spaces GraphQL normally uses."""
lines = query.split('\n')
final_lines = []
for line in lines:
consecutive_spaces = 0
for char in line:
if char == ' ':
consecutive_spaces += 1
else:
break
if consecutive_spaces % 2 != 0:
raise AssertionError(u'Indentation was not a multiple of two: '
u'{}'.format(consecutive_spaces))
final_lines.append((' ' * consecutive_spaces) + line[consecutive_spaces:])
return '\n'.join(final_lines) | python | def fix_indentation_depth(query):
lines = query.split('\n')
final_lines = []
for line in lines:
consecutive_spaces = 0
for char in line:
if char == ' ':
consecutive_spaces += 1
else:
break
if consecutive_spaces % 2 != 0:
raise AssertionError(u'Indentation was not a multiple of two: '
u'{}'.format(consecutive_spaces))
final_lines.append((' ' * consecutive_spaces) + line[consecutive_spaces:])
return '\n'.join(final_lines) | [
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246,778 | kensho-technologies/graphql-compiler | graphql_compiler/query_formatting/graphql_formatting.py | CustomPrintingVisitor.leave_Directive | def leave_Directive(self, node, *args):
"""Call when exiting a directive node in the ast."""
name_to_arg_value = {
# Taking [0] is ok here because the GraphQL parser checks for the
# existence of ':' in directive arguments.
arg.split(':', 1)[0]: arg
for arg in node.arguments
}
ordered_args = node.arguments
directive = DIRECTIVES_BY_NAME.get(node.name)
if directive:
sorted_args = []
encountered_argument_names = set()
# Iterate through all defined arguments in the directive schema.
for defined_arg_name in six.iterkeys(directive.args):
if defined_arg_name in name_to_arg_value:
# The argument was present in the query, print it in the correct order.
encountered_argument_names.add(defined_arg_name)
sorted_args.append(name_to_arg_value[defined_arg_name])
# Get all the arguments that weren't defined in the directive schema.
# They will be printed after all the arguments that were in the schema.
unsorted_args = [
value
for name, value in six.iteritems(name_to_arg_value)
if name not in encountered_argument_names
]
ordered_args = sorted_args + unsorted_args
return '@' + node.name + wrap('(', join(ordered_args, ', '), ')') | python | def leave_Directive(self, node, *args):
name_to_arg_value = {
# Taking [0] is ok here because the GraphQL parser checks for the
# existence of ':' in directive arguments.
arg.split(':', 1)[0]: arg
for arg in node.arguments
}
ordered_args = node.arguments
directive = DIRECTIVES_BY_NAME.get(node.name)
if directive:
sorted_args = []
encountered_argument_names = set()
# Iterate through all defined arguments in the directive schema.
for defined_arg_name in six.iterkeys(directive.args):
if defined_arg_name in name_to_arg_value:
# The argument was present in the query, print it in the correct order.
encountered_argument_names.add(defined_arg_name)
sorted_args.append(name_to_arg_value[defined_arg_name])
# Get all the arguments that weren't defined in the directive schema.
# They will be printed after all the arguments that were in the schema.
unsorted_args = [
value
for name, value in six.iteritems(name_to_arg_value)
if name not in encountered_argument_names
]
ordered_args = sorted_args + unsorted_args
return '@' + node.name + wrap('(', join(ordered_args, ', '), ')') | [
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246,779 | kensho-technologies/graphql-compiler | graphql_compiler/compiler/ir_lowering_match/__init__.py | lower_ir | def lower_ir(ir_blocks, query_metadata_table, type_equivalence_hints=None):
"""Lower the IR into an IR form that can be represented in MATCH queries.
Args:
ir_blocks: list of IR blocks to lower into MATCH-compatible form
query_metadata_table: QueryMetadataTable object containing all metadata collected during
query processing, including location metadata (e.g. which locations
are folded or optional).
type_equivalence_hints: optional dict of GraphQL interface or type -> GraphQL union.
Used as a workaround for GraphQL's lack of support for
inheritance across "types" (i.e. non-interfaces), as well as a
workaround for Gremlin's total lack of inheritance-awareness.
The key-value pairs in the dict specify that the "key" type
is equivalent to the "value" type, i.e. that the GraphQL type or
interface in the key is the most-derived common supertype
of every GraphQL type in the "value" GraphQL union.
Recursive expansion of type equivalence hints is not performed,
and only type-level correctness of this argument is enforced.
See README.md for more details on everything this parameter does.
*****
Be very careful with this option, as bad input here will
lead to incorrect output queries being generated.
*****
Returns:
MatchQuery object containing the IR blocks organized in a MATCH-like structure
"""
sanity_check_ir_blocks_from_frontend(ir_blocks, query_metadata_table)
# Construct the mapping of each location to its corresponding GraphQL type.
location_types = {
location: location_info.type
for location, location_info in query_metadata_table.registered_locations
}
# Compute the set of all locations that have associated type coercions.
coerced_locations = {
location
for location, location_info in query_metadata_table.registered_locations
if location_info.coerced_from_type is not None
}
# Extract information for both simple and complex @optional traverses
location_to_optional_results = extract_optional_location_root_info(ir_blocks)
complex_optional_roots, location_to_optional_roots = location_to_optional_results
simple_optional_root_info = extract_simple_optional_location_info(
ir_blocks, complex_optional_roots, location_to_optional_roots)
ir_blocks = remove_end_optionals(ir_blocks)
# Append global operation block(s) to filter out incorrect results
# from simple optional match traverses (using a WHERE statement)
if len(simple_optional_root_info) > 0:
where_filter_predicate = construct_where_filter_predicate(
query_metadata_table, simple_optional_root_info)
ir_blocks.insert(-1, GlobalOperationsStart())
ir_blocks.insert(-1, Filter(where_filter_predicate))
# These lowering / optimization passes work on IR blocks.
ir_blocks = lower_context_field_existence(ir_blocks, query_metadata_table)
ir_blocks = optimize_boolean_expression_comparisons(ir_blocks)
ir_blocks = rewrite_binary_composition_inside_ternary_conditional(ir_blocks)
ir_blocks = merge_consecutive_filter_clauses(ir_blocks)
ir_blocks = lower_has_substring_binary_compositions(ir_blocks)
ir_blocks = orientdb_eval_scheduling.workaround_lowering_pass(ir_blocks, query_metadata_table)
# Here, we lower from raw IR blocks into a MatchQuery object.
# From this point on, the lowering / optimization passes work on the MatchQuery representation.
match_query = convert_to_match_query(ir_blocks)
match_query = lower_comparisons_to_between(match_query)
match_query = lower_backtrack_blocks(match_query, location_types)
match_query = truncate_repeated_single_step_traversals(match_query)
match_query = orientdb_class_with_while.workaround_type_coercions_in_recursions(match_query)
# Optimize and lower the IR blocks inside @fold scopes.
new_folds = {
key: merge_consecutive_filter_clauses(
remove_backtrack_blocks_from_fold(
lower_folded_coerce_types_into_filter_blocks(folded_ir_blocks)
)
)
for key, folded_ir_blocks in six.iteritems(match_query.folds)
}
match_query = match_query._replace(folds=new_folds)
compound_match_query = convert_optional_traversals_to_compound_match_query(
match_query, complex_optional_roots, location_to_optional_roots)
compound_match_query = prune_non_existent_outputs(compound_match_query)
compound_match_query = collect_filters_to_first_location_occurrence(compound_match_query)
compound_match_query = lower_context_field_expressions(compound_match_query)
compound_match_query = truncate_repeated_single_step_traversals_in_sub_queries(
compound_match_query)
compound_match_query = orientdb_query_execution.expose_ideal_query_execution_start_points(
compound_match_query, location_types, coerced_locations)
return compound_match_query | python | def lower_ir(ir_blocks, query_metadata_table, type_equivalence_hints=None):
sanity_check_ir_blocks_from_frontend(ir_blocks, query_metadata_table)
# Construct the mapping of each location to its corresponding GraphQL type.
location_types = {
location: location_info.type
for location, location_info in query_metadata_table.registered_locations
}
# Compute the set of all locations that have associated type coercions.
coerced_locations = {
location
for location, location_info in query_metadata_table.registered_locations
if location_info.coerced_from_type is not None
}
# Extract information for both simple and complex @optional traverses
location_to_optional_results = extract_optional_location_root_info(ir_blocks)
complex_optional_roots, location_to_optional_roots = location_to_optional_results
simple_optional_root_info = extract_simple_optional_location_info(
ir_blocks, complex_optional_roots, location_to_optional_roots)
ir_blocks = remove_end_optionals(ir_blocks)
# Append global operation block(s) to filter out incorrect results
# from simple optional match traverses (using a WHERE statement)
if len(simple_optional_root_info) > 0:
where_filter_predicate = construct_where_filter_predicate(
query_metadata_table, simple_optional_root_info)
ir_blocks.insert(-1, GlobalOperationsStart())
ir_blocks.insert(-1, Filter(where_filter_predicate))
# These lowering / optimization passes work on IR blocks.
ir_blocks = lower_context_field_existence(ir_blocks, query_metadata_table)
ir_blocks = optimize_boolean_expression_comparisons(ir_blocks)
ir_blocks = rewrite_binary_composition_inside_ternary_conditional(ir_blocks)
ir_blocks = merge_consecutive_filter_clauses(ir_blocks)
ir_blocks = lower_has_substring_binary_compositions(ir_blocks)
ir_blocks = orientdb_eval_scheduling.workaround_lowering_pass(ir_blocks, query_metadata_table)
# Here, we lower from raw IR blocks into a MatchQuery object.
# From this point on, the lowering / optimization passes work on the MatchQuery representation.
match_query = convert_to_match_query(ir_blocks)
match_query = lower_comparisons_to_between(match_query)
match_query = lower_backtrack_blocks(match_query, location_types)
match_query = truncate_repeated_single_step_traversals(match_query)
match_query = orientdb_class_with_while.workaround_type_coercions_in_recursions(match_query)
# Optimize and lower the IR blocks inside @fold scopes.
new_folds = {
key: merge_consecutive_filter_clauses(
remove_backtrack_blocks_from_fold(
lower_folded_coerce_types_into_filter_blocks(folded_ir_blocks)
)
)
for key, folded_ir_blocks in six.iteritems(match_query.folds)
}
match_query = match_query._replace(folds=new_folds)
compound_match_query = convert_optional_traversals_to_compound_match_query(
match_query, complex_optional_roots, location_to_optional_roots)
compound_match_query = prune_non_existent_outputs(compound_match_query)
compound_match_query = collect_filters_to_first_location_occurrence(compound_match_query)
compound_match_query = lower_context_field_expressions(compound_match_query)
compound_match_query = truncate_repeated_single_step_traversals_in_sub_queries(
compound_match_query)
compound_match_query = orientdb_query_execution.expose_ideal_query_execution_start_points(
compound_match_query, location_types, coerced_locations)
return compound_match_query | [
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ir_blocks: list of IR blocks to lower into MATCH-compatible form
query_metadata_table: QueryMetadataTable object containing all metadata collected during
query processing, including location metadata (e.g. which locations
are folded or optional).
type_equivalence_hints: optional dict of GraphQL interface or type -> GraphQL union.
Used as a workaround for GraphQL's lack of support for
inheritance across "types" (i.e. non-interfaces), as well as a
workaround for Gremlin's total lack of inheritance-awareness.
The key-value pairs in the dict specify that the "key" type
is equivalent to the "value" type, i.e. that the GraphQL type or
interface in the key is the most-derived common supertype
of every GraphQL type in the "value" GraphQL union.
Recursive expansion of type equivalence hints is not performed,
and only type-level correctness of this argument is enforced.
See README.md for more details on everything this parameter does.
*****
Be very careful with this option, as bad input here will
lead to incorrect output queries being generated.
*****
Returns:
MatchQuery object containing the IR blocks organized in a MATCH-like structure | [
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246,780 | kensho-technologies/graphql-compiler | graphql_compiler/schema_generation/utils.py | toposort_classes | def toposort_classes(classes):
"""Sort class metadatas so that a superclass is always before the subclass"""
def get_class_topolist(class_name, name_to_class, processed_classes, current_trace):
"""Return a topologically sorted list of this class's dependencies and class itself
Args:
class_name: string, name of the class to process
name_to_class: dict, class_name -> descriptor
processed_classes: set of strings, a set of classes that have already been processed
current_trace: list of strings, list of classes traversed during the recursion
Returns:
list of dicts, list of classes sorted in topological order
"""
# Check if this class has already been handled
if class_name in processed_classes:
return []
if class_name in current_trace:
raise AssertionError(
'Encountered self-reference in dependency chain of {}'.format(class_name))
cls = name_to_class[class_name]
# Collect the dependency classes
# These are bases and classes from linked properties
dependencies = _list_superclasses(cls)
# Recursively process linked edges
properties = cls['properties'] if 'properties' in cls else []
for prop in properties:
if 'linkedClass' in prop:
dependencies.append(prop['linkedClass'])
class_list = []
# Recursively process superclasses
current_trace.add(class_name)
for dependency in dependencies:
class_list.extend(get_class_topolist(
dependency, name_to_class, processed_classes, current_trace))
current_trace.remove(class_name)
# Do the bookkeeping
class_list.append(name_to_class[class_name])
processed_classes.add(class_name)
return class_list
# Map names to classes
class_map = {c['name']: c for c in classes}
seen_classes = set()
toposorted = []
for name in class_map.keys():
toposorted.extend(get_class_topolist(name, class_map, seen_classes, set()))
return toposorted | python | def toposort_classes(classes):
def get_class_topolist(class_name, name_to_class, processed_classes, current_trace):
"""Return a topologically sorted list of this class's dependencies and class itself
Args:
class_name: string, name of the class to process
name_to_class: dict, class_name -> descriptor
processed_classes: set of strings, a set of classes that have already been processed
current_trace: list of strings, list of classes traversed during the recursion
Returns:
list of dicts, list of classes sorted in topological order
"""
# Check if this class has already been handled
if class_name in processed_classes:
return []
if class_name in current_trace:
raise AssertionError(
'Encountered self-reference in dependency chain of {}'.format(class_name))
cls = name_to_class[class_name]
# Collect the dependency classes
# These are bases and classes from linked properties
dependencies = _list_superclasses(cls)
# Recursively process linked edges
properties = cls['properties'] if 'properties' in cls else []
for prop in properties:
if 'linkedClass' in prop:
dependencies.append(prop['linkedClass'])
class_list = []
# Recursively process superclasses
current_trace.add(class_name)
for dependency in dependencies:
class_list.extend(get_class_topolist(
dependency, name_to_class, processed_classes, current_trace))
current_trace.remove(class_name)
# Do the bookkeeping
class_list.append(name_to_class[class_name])
processed_classes.add(class_name)
return class_list
# Map names to classes
class_map = {c['name']: c for c in classes}
seen_classes = set()
toposorted = []
for name in class_map.keys():
toposorted.extend(get_class_topolist(name, class_map, seen_classes, set()))
return toposorted | [
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246,781 | kensho-technologies/graphql-compiler | graphql_compiler/schema_generation/utils.py | _list_superclasses | def _list_superclasses(class_def):
"""Return a list of the superclasses of the given class"""
superclasses = class_def.get('superClasses', [])
if superclasses:
# Make sure to duplicate the list
return list(superclasses)
sup = class_def.get('superClass', None)
if sup:
return [sup]
else:
return [] | python | def _list_superclasses(class_def):
superclasses = class_def.get('superClasses', [])
if superclasses:
# Make sure to duplicate the list
return list(superclasses)
sup = class_def.get('superClass', None)
if sup:
return [sup]
else:
return [] | [
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246,782 | kensho-technologies/graphql-compiler | graphql_compiler/compiler/compiler_frontend.py | _construct_location_stack_entry | def _construct_location_stack_entry(location, num_traverses):
"""Return a LocationStackEntry namedtuple with the specified parameters."""
if not isinstance(num_traverses, int) or num_traverses < 0:
raise AssertionError(u'Attempted to create a LocationStackEntry namedtuple with an invalid '
u'value for "num_traverses" {}. This is not allowed.'
.format(num_traverses))
if not isinstance(location, Location):
raise AssertionError(u'Attempted to create a LocationStackEntry namedtuple with an invalid '
u'value for "location" {}. This is not allowed.'
.format(location))
return LocationStackEntry(location=location, num_traverses=num_traverses) | python | def _construct_location_stack_entry(location, num_traverses):
if not isinstance(num_traverses, int) or num_traverses < 0:
raise AssertionError(u'Attempted to create a LocationStackEntry namedtuple with an invalid '
u'value for "num_traverses" {}. This is not allowed.'
.format(num_traverses))
if not isinstance(location, Location):
raise AssertionError(u'Attempted to create a LocationStackEntry namedtuple with an invalid '
u'value for "location" {}. This is not allowed.'
.format(location))
return LocationStackEntry(location=location, num_traverses=num_traverses) | [
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246,783 | kensho-technologies/graphql-compiler | graphql_compiler/compiler/compiler_frontend.py | _get_fields | def _get_fields(ast):
"""Return a list of vertex fields, and a list of property fields, for the given AST node.
Also verifies that all property fields for the AST node appear before all vertex fields,
raising GraphQLCompilationError if that is not the case.
Args:
ast: GraphQL AST node, obtained from the graphql library
Returns:
tuple of two lists
- the first list contains ASTs for vertex fields
- the second list contains ASTs for property fields
"""
if not ast.selection_set:
# There are no child fields.
return [], []
property_fields = []
vertex_fields = []
seen_field_names = set()
switched_to_vertices = False # Ensures that all property fields are before all vertex fields.
for field_ast in ast.selection_set.selections:
if not isinstance(field_ast, Field):
# We are getting Fields only, ignore everything else.
continue
name = get_ast_field_name(field_ast)
if name in seen_field_names:
# If we ever allow repeated field names,
# then we have to change the Location naming scheme to reflect the repetitions
# and disambiguate between Recurse and Traverse visits to a Location.
raise GraphQLCompilationError(u'Encountered repeated field name: {}'.format(name))
seen_field_names.add(name)
# Vertex fields start with 'out_' or 'in_', denoting the edge direction to that vertex.
if is_vertex_field_name(name):
switched_to_vertices = True
vertex_fields.append(field_ast)
else:
if switched_to_vertices:
raise GraphQLCompilationError(u'Encountered property field {} '
u'after vertex fields!'.format(name))
property_fields.append(field_ast)
return vertex_fields, property_fields | python | def _get_fields(ast):
if not ast.selection_set:
# There are no child fields.
return [], []
property_fields = []
vertex_fields = []
seen_field_names = set()
switched_to_vertices = False # Ensures that all property fields are before all vertex fields.
for field_ast in ast.selection_set.selections:
if not isinstance(field_ast, Field):
# We are getting Fields only, ignore everything else.
continue
name = get_ast_field_name(field_ast)
if name in seen_field_names:
# If we ever allow repeated field names,
# then we have to change the Location naming scheme to reflect the repetitions
# and disambiguate between Recurse and Traverse visits to a Location.
raise GraphQLCompilationError(u'Encountered repeated field name: {}'.format(name))
seen_field_names.add(name)
# Vertex fields start with 'out_' or 'in_', denoting the edge direction to that vertex.
if is_vertex_field_name(name):
switched_to_vertices = True
vertex_fields.append(field_ast)
else:
if switched_to_vertices:
raise GraphQLCompilationError(u'Encountered property field {} '
u'after vertex fields!'.format(name))
property_fields.append(field_ast)
return vertex_fields, property_fields | [
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246,784 | kensho-technologies/graphql-compiler | graphql_compiler/compiler/compiler_frontend.py | _get_inline_fragment | def _get_inline_fragment(ast):
"""Return the inline fragment at the current AST node, or None if no fragment exists."""
if not ast.selection_set:
# There is nothing selected here, so no fragment.
return None
fragments = [
ast_node
for ast_node in ast.selection_set.selections
if isinstance(ast_node, InlineFragment)
]
if not fragments:
return None
if len(fragments) > 1:
raise GraphQLCompilationError(u'Cannot compile GraphQL with more than one fragment in '
u'a given selection set.')
return fragments[0] | python | def _get_inline_fragment(ast):
if not ast.selection_set:
# There is nothing selected here, so no fragment.
return None
fragments = [
ast_node
for ast_node in ast.selection_set.selections
if isinstance(ast_node, InlineFragment)
]
if not fragments:
return None
if len(fragments) > 1:
raise GraphQLCompilationError(u'Cannot compile GraphQL with more than one fragment in '
u'a given selection set.')
return fragments[0] | [
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246,785 | kensho-technologies/graphql-compiler | graphql_compiler/compiler/compiler_frontend.py | _process_output_source_directive | def _process_output_source_directive(schema, current_schema_type, ast,
location, context, local_unique_directives):
"""Process the output_source directive, modifying the context as appropriate.
Args:
schema: GraphQL schema object, obtained from the graphql library
current_schema_type: GraphQLType, the schema type at the current location
ast: GraphQL AST node, obtained from the graphql library
location: Location object representing the current location in the query
context: dict, various per-compilation data (e.g. declared tags, whether the current block
is optional, etc.). May be mutated in-place in this function!
local_unique_directives: dict, directive name string -> directive object, containing
unique directives present on the current AST node *only*
Returns:
an OutputSource block, if one should be emitted, or None otherwise
"""
# The 'ast' variable is only for function signature uniformity, and is currently not used.
output_source_directive = local_unique_directives.get('output_source', None)
if output_source_directive:
if has_encountered_output_source(context):
raise GraphQLCompilationError(u'Cannot have more than one output source!')
if is_in_optional_scope(context):
raise GraphQLCompilationError(u'Cannot have the output source in an optional block!')
set_output_source_data(context, location)
return blocks.OutputSource()
else:
return None | python | def _process_output_source_directive(schema, current_schema_type, ast,
location, context, local_unique_directives):
# The 'ast' variable is only for function signature uniformity, and is currently not used.
output_source_directive = local_unique_directives.get('output_source', None)
if output_source_directive:
if has_encountered_output_source(context):
raise GraphQLCompilationError(u'Cannot have more than one output source!')
if is_in_optional_scope(context):
raise GraphQLCompilationError(u'Cannot have the output source in an optional block!')
set_output_source_data(context, location)
return blocks.OutputSource()
else:
return None | [
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246,786 | kensho-technologies/graphql-compiler | graphql_compiler/compiler/compiler_frontend.py | _compile_property_ast | def _compile_property_ast(schema, current_schema_type, ast, location,
context, unique_local_directives):
"""Process property directives at this AST node, updating the query context as appropriate.
Args:
schema: GraphQL schema object, obtained from the graphql library
current_schema_type: GraphQLType, the schema type at the current location
ast: GraphQL AST node, obtained from the graphql library. Only for function signature
uniformity at the moment -- it is currently not used.
location: Location object representing the current location in the query
context: dict, various per-compilation data (e.g. declared tags, whether the current block
is optional, etc.). May be mutated in-place in this function!
unique_local_directives: dict, directive name string -> directive object, containing
unique directives present on the current AST node *only*
"""
validate_property_directives(unique_local_directives)
if location.field == COUNT_META_FIELD_NAME:
# Verify that uses of this field are within a @fold scope.
if not is_in_fold_scope(context):
raise GraphQLCompilationError(u'Cannot use the "{}" meta field when not within a @fold '
u'vertex field, as counting elements only makes sense '
u'in a fold. Location: {}'
.format(COUNT_META_FIELD_NAME, location))
# step P-2: process property-only directives
tag_directive = unique_local_directives.get('tag', None)
if tag_directive:
if is_in_fold_scope(context):
raise GraphQLCompilationError(u'Tagging values within a @fold vertex field is '
u'not allowed! Location: {}'.format(location))
if location.field == COUNT_META_FIELD_NAME:
raise AssertionError(u'Tags are prohibited within @fold, but unexpectedly found use of '
u'a tag on the {} meta field that is only allowed within a @fold!'
u'Location: {}'
.format(COUNT_META_FIELD_NAME, location))
# Schema validation has ensured that the fields below exist.
tag_name = tag_directive.arguments[0].value.value
if tag_name in context['tags']:
raise GraphQLCompilationError(u'Cannot reuse tag name: {}'.format(tag_name))
validate_safe_string(tag_name)
context['tags'][tag_name] = {
'location': location,
'optional': is_in_optional_scope(context),
'type': strip_non_null_from_type(current_schema_type),
}
context['metadata'].record_tag_info(tag_name, TagInfo(location=location))
output_directive = unique_local_directives.get('output', None)
if output_directive:
# Schema validation has ensured that the fields below exist.
output_name = output_directive.arguments[0].value.value
if output_name in context['outputs']:
raise GraphQLCompilationError(u'Cannot reuse output name: '
u'{}, {}'.format(output_name, context))
validate_safe_string(output_name)
validate_output_name(output_name)
graphql_type = strip_non_null_from_type(current_schema_type)
if is_in_fold_scope(context):
# Fold outputs are only allowed at the last level of traversal.
set_fold_innermost_scope(context)
if location.field != COUNT_META_FIELD_NAME:
graphql_type = GraphQLList(graphql_type)
context['outputs'][output_name] = {
'location': location,
'optional': is_in_optional_scope(context),
'type': graphql_type,
'fold': context.get('fold', None),
} | python | def _compile_property_ast(schema, current_schema_type, ast, location,
context, unique_local_directives):
validate_property_directives(unique_local_directives)
if location.field == COUNT_META_FIELD_NAME:
# Verify that uses of this field are within a @fold scope.
if not is_in_fold_scope(context):
raise GraphQLCompilationError(u'Cannot use the "{}" meta field when not within a @fold '
u'vertex field, as counting elements only makes sense '
u'in a fold. Location: {}'
.format(COUNT_META_FIELD_NAME, location))
# step P-2: process property-only directives
tag_directive = unique_local_directives.get('tag', None)
if tag_directive:
if is_in_fold_scope(context):
raise GraphQLCompilationError(u'Tagging values within a @fold vertex field is '
u'not allowed! Location: {}'.format(location))
if location.field == COUNT_META_FIELD_NAME:
raise AssertionError(u'Tags are prohibited within @fold, but unexpectedly found use of '
u'a tag on the {} meta field that is only allowed within a @fold!'
u'Location: {}'
.format(COUNT_META_FIELD_NAME, location))
# Schema validation has ensured that the fields below exist.
tag_name = tag_directive.arguments[0].value.value
if tag_name in context['tags']:
raise GraphQLCompilationError(u'Cannot reuse tag name: {}'.format(tag_name))
validate_safe_string(tag_name)
context['tags'][tag_name] = {
'location': location,
'optional': is_in_optional_scope(context),
'type': strip_non_null_from_type(current_schema_type),
}
context['metadata'].record_tag_info(tag_name, TagInfo(location=location))
output_directive = unique_local_directives.get('output', None)
if output_directive:
# Schema validation has ensured that the fields below exist.
output_name = output_directive.arguments[0].value.value
if output_name in context['outputs']:
raise GraphQLCompilationError(u'Cannot reuse output name: '
u'{}, {}'.format(output_name, context))
validate_safe_string(output_name)
validate_output_name(output_name)
graphql_type = strip_non_null_from_type(current_schema_type)
if is_in_fold_scope(context):
# Fold outputs are only allowed at the last level of traversal.
set_fold_innermost_scope(context)
if location.field != COUNT_META_FIELD_NAME:
graphql_type = GraphQLList(graphql_type)
context['outputs'][output_name] = {
'location': location,
'optional': is_in_optional_scope(context),
'type': graphql_type,
'fold': context.get('fold', None),
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current_schema_type: GraphQLType, the schema type at the current location
ast: GraphQL AST node, obtained from the graphql library. Only for function signature
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location: Location object representing the current location in the query
context: dict, various per-compilation data (e.g. declared tags, whether the current block
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unique_local_directives: dict, directive name string -> directive object, containing
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246,787 | kensho-technologies/graphql-compiler | graphql_compiler/compiler/compiler_frontend.py | _get_recurse_directive_depth | def _get_recurse_directive_depth(field_name, field_directives):
"""Validate and return the depth parameter of the recurse directive."""
recurse_directive = field_directives['recurse']
optional_directive = field_directives.get('optional', None)
if optional_directive:
raise GraphQLCompilationError(u'Found both @optional and @recurse on '
u'the same vertex field: {}'.format(field_name))
recurse_args = get_uniquely_named_objects_by_name(recurse_directive.arguments)
recurse_depth = int(recurse_args['depth'].value.value)
if recurse_depth < 1:
raise GraphQLCompilationError(u'Found recurse directive with disallowed depth: '
u'{}'.format(recurse_depth))
return recurse_depth | python | def _get_recurse_directive_depth(field_name, field_directives):
recurse_directive = field_directives['recurse']
optional_directive = field_directives.get('optional', None)
if optional_directive:
raise GraphQLCompilationError(u'Found both @optional and @recurse on '
u'the same vertex field: {}'.format(field_name))
recurse_args = get_uniquely_named_objects_by_name(recurse_directive.arguments)
recurse_depth = int(recurse_args['depth'].value.value)
if recurse_depth < 1:
raise GraphQLCompilationError(u'Found recurse directive with disallowed depth: '
u'{}'.format(recurse_depth))
return recurse_depth | [
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246,788 | kensho-technologies/graphql-compiler | graphql_compiler/compiler/compiler_frontend.py | _validate_recurse_directive_types | def _validate_recurse_directive_types(current_schema_type, field_schema_type, context):
"""Perform type checks on the enclosing type and the recursed type for a recurse directive.
Args:
current_schema_type: GraphQLType, the schema type at the current location
field_schema_type: GraphQLType, the schema type at the inner scope
context: dict, various per-compilation data (e.g. declared tags, whether the current block
is optional, etc.). May be mutated in-place in this function!
"""
# Get the set of all allowed types in the current scope.
type_hints = context['type_equivalence_hints'].get(field_schema_type)
type_hints_inverse = context['type_equivalence_hints_inverse'].get(field_schema_type)
allowed_current_types = {field_schema_type}
if type_hints and isinstance(type_hints, GraphQLUnionType):
allowed_current_types.update(type_hints.types)
if type_hints_inverse and isinstance(type_hints_inverse, GraphQLUnionType):
allowed_current_types.update(type_hints_inverse.types)
# The current scope must be of the same type as the field scope, or an acceptable subtype.
current_scope_is_allowed = current_schema_type in allowed_current_types
is_implemented_interface = (
isinstance(field_schema_type, GraphQLInterfaceType) and
isinstance(current_schema_type, GraphQLObjectType) and
field_schema_type in current_schema_type.interfaces
)
if not any((current_scope_is_allowed, is_implemented_interface)):
raise GraphQLCompilationError(u'Edges expanded with a @recurse directive must either '
u'be of the same type as their enclosing scope, a supertype '
u'of the enclosing scope, or be of an interface type that is '
u'implemented by the type of their enclosing scope. '
u'Enclosing scope type: {}, edge type: '
u'{}'.format(current_schema_type, field_schema_type)) | python | def _validate_recurse_directive_types(current_schema_type, field_schema_type, context):
# Get the set of all allowed types in the current scope.
type_hints = context['type_equivalence_hints'].get(field_schema_type)
type_hints_inverse = context['type_equivalence_hints_inverse'].get(field_schema_type)
allowed_current_types = {field_schema_type}
if type_hints and isinstance(type_hints, GraphQLUnionType):
allowed_current_types.update(type_hints.types)
if type_hints_inverse and isinstance(type_hints_inverse, GraphQLUnionType):
allowed_current_types.update(type_hints_inverse.types)
# The current scope must be of the same type as the field scope, or an acceptable subtype.
current_scope_is_allowed = current_schema_type in allowed_current_types
is_implemented_interface = (
isinstance(field_schema_type, GraphQLInterfaceType) and
isinstance(current_schema_type, GraphQLObjectType) and
field_schema_type in current_schema_type.interfaces
)
if not any((current_scope_is_allowed, is_implemented_interface)):
raise GraphQLCompilationError(u'Edges expanded with a @recurse directive must either '
u'be of the same type as their enclosing scope, a supertype '
u'of the enclosing scope, or be of an interface type that is '
u'implemented by the type of their enclosing scope. '
u'Enclosing scope type: {}, edge type: '
u'{}'.format(current_schema_type, field_schema_type)) | [
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field_schema_type: GraphQLType, the schema type at the inner scope
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246,789 | kensho-technologies/graphql-compiler | graphql_compiler/compiler/compiler_frontend.py | _compile_fragment_ast | def _compile_fragment_ast(schema, current_schema_type, ast, location, context):
"""Return a list of basic blocks corresponding to the inline fragment at this AST node.
Args:
schema: GraphQL schema object, obtained from the graphql library
current_schema_type: GraphQLType, the schema type at the current location
ast: GraphQL AST node, obtained from the graphql library.
location: Location object representing the current location in the query
context: dict, various per-compilation data (e.g. declared tags, whether the current block
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Returns:
list of basic blocks, the compiled output of the vertex AST node
"""
query_metadata_table = context['metadata']
# step F-2. Emit a type coercion block if appropriate,
# then recurse into the fragment's selection.
coerces_to_type_name = ast.type_condition.name.value
coerces_to_type_obj = schema.get_type(coerces_to_type_name)
basic_blocks = []
# Check if the coercion is necessary.
# No coercion is necessary if coercing to the current type of the scope,
# or if the scope is of union type, to the base type of the union as defined by
# the type_equivalence_hints compilation parameter.
is_same_type_as_scope = current_schema_type.is_same_type(coerces_to_type_obj)
equivalent_union_type = context['type_equivalence_hints'].get(coerces_to_type_obj, None)
is_base_type_of_union = (
isinstance(current_schema_type, GraphQLUnionType) and
current_schema_type.is_same_type(equivalent_union_type)
)
if not (is_same_type_as_scope or is_base_type_of_union):
# Coercion is required.
query_metadata_table.record_coercion_at_location(location, coerces_to_type_obj)
basic_blocks.append(blocks.CoerceType({coerces_to_type_name}))
inner_basic_blocks = _compile_ast_node_to_ir(
schema, coerces_to_type_obj, ast, location, context)
basic_blocks.extend(inner_basic_blocks)
return basic_blocks | python | def _compile_fragment_ast(schema, current_schema_type, ast, location, context):
query_metadata_table = context['metadata']
# step F-2. Emit a type coercion block if appropriate,
# then recurse into the fragment's selection.
coerces_to_type_name = ast.type_condition.name.value
coerces_to_type_obj = schema.get_type(coerces_to_type_name)
basic_blocks = []
# Check if the coercion is necessary.
# No coercion is necessary if coercing to the current type of the scope,
# or if the scope is of union type, to the base type of the union as defined by
# the type_equivalence_hints compilation parameter.
is_same_type_as_scope = current_schema_type.is_same_type(coerces_to_type_obj)
equivalent_union_type = context['type_equivalence_hints'].get(coerces_to_type_obj, None)
is_base_type_of_union = (
isinstance(current_schema_type, GraphQLUnionType) and
current_schema_type.is_same_type(equivalent_union_type)
)
if not (is_same_type_as_scope or is_base_type_of_union):
# Coercion is required.
query_metadata_table.record_coercion_at_location(location, coerces_to_type_obj)
basic_blocks.append(blocks.CoerceType({coerces_to_type_name}))
inner_basic_blocks = _compile_ast_node_to_ir(
schema, coerces_to_type_obj, ast, location, context)
basic_blocks.extend(inner_basic_blocks)
return basic_blocks | [
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ast: GraphQL AST node, obtained from the graphql library.
location: Location object representing the current location in the query
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246,790 | kensho-technologies/graphql-compiler | graphql_compiler/compiler/compiler_frontend.py | _compile_ast_node_to_ir | def _compile_ast_node_to_ir(schema, current_schema_type, ast, location, context):
"""Compile the given GraphQL AST node into a list of basic blocks.
Args:
schema: GraphQL schema object, obtained from the graphql library
current_schema_type: GraphQLType, the schema type at the current location
ast: the current GraphQL AST node, obtained from the graphql library
location: Location object representing the current location in the query
context: dict, various per-compilation data (e.g. declared tags, whether the current block
is optional, etc.). May be mutated in-place in this function!
Returns:
list of basic blocks corresponding to this GraphQL AST node
"""
basic_blocks = []
# step 0: preprocessing
local_unique_directives = get_unique_directives(ast)
fields = _get_fields(ast)
vertex_fields, property_fields = fields
fragment = _get_inline_fragment(ast)
filter_operations = get_local_filter_directives(
ast, current_schema_type, vertex_fields)
# We don't support type coercion while at the same time selecting fields.
# Either there are no fields, or there is no fragment, otherwise we raise a compilation error.
fragment_exists = fragment is not None
fields_exist = vertex_fields or property_fields
if fragment_exists and fields_exist:
raise GraphQLCompilationError(u'Cannot compile GraphQL that has inline fragment and '
u'selected fields in the same selection. Please move the '
u'selected fields inside the inline fragment.')
if location.field is not None: # we're at a property field
# sanity-check: cannot have an inline fragment at a property field
if fragment_exists:
raise AssertionError(u'Found inline fragment at a property field: '
u'{} {}'.format(location, fragment))
# sanity-check: locations at properties don't have their own property locations
if len(property_fields) > 0:
raise AssertionError(u'Found property fields on a property field: '
u'{} {}'.format(location, property_fields))
# step 1: apply local filter, if any
for filter_operation_info in filter_operations:
filter_block = process_filter_directive(filter_operation_info, location, context)
if isinstance(location, FoldScopeLocation) and location.field == COUNT_META_FIELD_NAME:
# Filtering on the fold count field is only allowed at the innermost scope of a fold.
set_fold_innermost_scope(context)
# This Filter is going in the global operations section of the query, so it cannot
# use LocalField expressions since there is no "local" location to use.
# Rewrite it so that all references of data at a location instead use ContextFields.
expected_field = expressions.LocalField(COUNT_META_FIELD_NAME)
replacement_field = expressions.FoldedContextField(location, GraphQLInt)
visitor_fn = expressions.make_replacement_visitor(expected_field, replacement_field)
filter_block = filter_block.visit_and_update_expressions(visitor_fn)
visitor_fn = expressions.make_type_replacement_visitor(
expressions.ContextField,
lambda context_field: expressions.GlobalContextField(
context_field.location, context_field.field_type))
filter_block = filter_block.visit_and_update_expressions(visitor_fn)
set_fold_count_filter(context)
context['global_filters'].append(filter_block)
else:
basic_blocks.append(filter_block)
if location.field is not None:
# The location is at a property, compile the property data following P-steps.
_compile_property_ast(schema, current_schema_type, ast,
location, context, local_unique_directives)
else:
# The location is at a vertex.
if fragment_exists:
# Compile the fragment data following F-steps.
# N.B.: Note that the "fragment" variable is the fragment's AST. Since we've asserted
# that the fragment is the only part of the selection set at the current AST node,
# we pass the "fragment" in the AST parameter of the _compile_fragment_ast()
# function, rather than the current AST node as in the other compilation steps.
basic_blocks.extend(
_compile_fragment_ast(schema, current_schema_type, fragment, location, context))
else:
# Compile the vertex data following V-steps.
basic_blocks.extend(
_compile_vertex_ast(schema, current_schema_type, ast,
location, context, local_unique_directives, fields))
return basic_blocks | python | def _compile_ast_node_to_ir(schema, current_schema_type, ast, location, context):
basic_blocks = []
# step 0: preprocessing
local_unique_directives = get_unique_directives(ast)
fields = _get_fields(ast)
vertex_fields, property_fields = fields
fragment = _get_inline_fragment(ast)
filter_operations = get_local_filter_directives(
ast, current_schema_type, vertex_fields)
# We don't support type coercion while at the same time selecting fields.
# Either there are no fields, or there is no fragment, otherwise we raise a compilation error.
fragment_exists = fragment is not None
fields_exist = vertex_fields or property_fields
if fragment_exists and fields_exist:
raise GraphQLCompilationError(u'Cannot compile GraphQL that has inline fragment and '
u'selected fields in the same selection. Please move the '
u'selected fields inside the inline fragment.')
if location.field is not None: # we're at a property field
# sanity-check: cannot have an inline fragment at a property field
if fragment_exists:
raise AssertionError(u'Found inline fragment at a property field: '
u'{} {}'.format(location, fragment))
# sanity-check: locations at properties don't have their own property locations
if len(property_fields) > 0:
raise AssertionError(u'Found property fields on a property field: '
u'{} {}'.format(location, property_fields))
# step 1: apply local filter, if any
for filter_operation_info in filter_operations:
filter_block = process_filter_directive(filter_operation_info, location, context)
if isinstance(location, FoldScopeLocation) and location.field == COUNT_META_FIELD_NAME:
# Filtering on the fold count field is only allowed at the innermost scope of a fold.
set_fold_innermost_scope(context)
# This Filter is going in the global operations section of the query, so it cannot
# use LocalField expressions since there is no "local" location to use.
# Rewrite it so that all references of data at a location instead use ContextFields.
expected_field = expressions.LocalField(COUNT_META_FIELD_NAME)
replacement_field = expressions.FoldedContextField(location, GraphQLInt)
visitor_fn = expressions.make_replacement_visitor(expected_field, replacement_field)
filter_block = filter_block.visit_and_update_expressions(visitor_fn)
visitor_fn = expressions.make_type_replacement_visitor(
expressions.ContextField,
lambda context_field: expressions.GlobalContextField(
context_field.location, context_field.field_type))
filter_block = filter_block.visit_and_update_expressions(visitor_fn)
set_fold_count_filter(context)
context['global_filters'].append(filter_block)
else:
basic_blocks.append(filter_block)
if location.field is not None:
# The location is at a property, compile the property data following P-steps.
_compile_property_ast(schema, current_schema_type, ast,
location, context, local_unique_directives)
else:
# The location is at a vertex.
if fragment_exists:
# Compile the fragment data following F-steps.
# N.B.: Note that the "fragment" variable is the fragment's AST. Since we've asserted
# that the fragment is the only part of the selection set at the current AST node,
# we pass the "fragment" in the AST parameter of the _compile_fragment_ast()
# function, rather than the current AST node as in the other compilation steps.
basic_blocks.extend(
_compile_fragment_ast(schema, current_schema_type, fragment, location, context))
else:
# Compile the vertex data following V-steps.
basic_blocks.extend(
_compile_vertex_ast(schema, current_schema_type, ast,
location, context, local_unique_directives, fields))
return basic_blocks | [
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Args:
schema: GraphQL schema object, obtained from the graphql library
current_schema_type: GraphQLType, the schema type at the current location
ast: the current GraphQL AST node, obtained from the graphql library
location: Location object representing the current location in the query
context: dict, various per-compilation data (e.g. declared tags, whether the current block
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246,791 | kensho-technologies/graphql-compiler | graphql_compiler/compiler/compiler_frontend.py | _validate_all_tags_are_used | def _validate_all_tags_are_used(metadata):
"""Ensure all tags are used in some filter."""
tag_names = set([tag_name for tag_name, _ in metadata.tags])
filter_arg_names = set()
for location, _ in metadata.registered_locations:
for filter_info in metadata.get_filter_infos(location):
for filter_arg in filter_info.args:
if is_tag_argument(filter_arg):
filter_arg_names.add(get_directive_argument_name(filter_arg))
unused_tags = tag_names - filter_arg_names
if unused_tags:
raise GraphQLCompilationError(u'This GraphQL query contains @tag directives whose values '
u'are not used: {}. This is not allowed. Please either use '
u'them in a filter or remove them entirely.'
.format(unused_tags)) | python | def _validate_all_tags_are_used(metadata):
tag_names = set([tag_name for tag_name, _ in metadata.tags])
filter_arg_names = set()
for location, _ in metadata.registered_locations:
for filter_info in metadata.get_filter_infos(location):
for filter_arg in filter_info.args:
if is_tag_argument(filter_arg):
filter_arg_names.add(get_directive_argument_name(filter_arg))
unused_tags = tag_names - filter_arg_names
if unused_tags:
raise GraphQLCompilationError(u'This GraphQL query contains @tag directives whose values '
u'are not used: {}. This is not allowed. Please either use '
u'them in a filter or remove them entirely.'
.format(unused_tags)) | [
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246,792 | kensho-technologies/graphql-compiler | graphql_compiler/compiler/compiler_frontend.py | _compile_output_step | def _compile_output_step(outputs):
"""Construct the final ConstructResult basic block that defines the output format of the query.
Args:
outputs: dict, output name (string) -> output data dict, specifying the location
from where to get the data, and whether the data is optional (and therefore
may be missing); missing optional data is replaced with 'null'
Returns:
a ConstructResult basic block that constructs appropriate outputs for the query
"""
if not outputs:
raise GraphQLCompilationError(u'No fields were selected for output! Please mark at least '
u'one field with the @output directive.')
output_fields = {}
for output_name, output_context in six.iteritems(outputs):
location = output_context['location']
optional = output_context['optional']
graphql_type = output_context['type']
expression = None
existence_check = None
# pylint: disable=redefined-variable-type
if isinstance(location, FoldScopeLocation):
if optional:
raise AssertionError(u'Unreachable state reached, optional in fold: '
u'{}'.format(output_context))
if location.field == COUNT_META_FIELD_NAME:
expression = expressions.FoldCountContextField(location)
else:
expression = expressions.FoldedContextField(location, graphql_type)
else:
expression = expressions.OutputContextField(location, graphql_type)
if optional:
existence_check = expressions.ContextFieldExistence(location.at_vertex())
if existence_check:
expression = expressions.TernaryConditional(
existence_check, expression, expressions.NullLiteral)
# pylint: enable=redefined-variable-type
output_fields[output_name] = expression
return blocks.ConstructResult(output_fields) | python | def _compile_output_step(outputs):
if not outputs:
raise GraphQLCompilationError(u'No fields were selected for output! Please mark at least '
u'one field with the @output directive.')
output_fields = {}
for output_name, output_context in six.iteritems(outputs):
location = output_context['location']
optional = output_context['optional']
graphql_type = output_context['type']
expression = None
existence_check = None
# pylint: disable=redefined-variable-type
if isinstance(location, FoldScopeLocation):
if optional:
raise AssertionError(u'Unreachable state reached, optional in fold: '
u'{}'.format(output_context))
if location.field == COUNT_META_FIELD_NAME:
expression = expressions.FoldCountContextField(location)
else:
expression = expressions.FoldedContextField(location, graphql_type)
else:
expression = expressions.OutputContextField(location, graphql_type)
if optional:
existence_check = expressions.ContextFieldExistence(location.at_vertex())
if existence_check:
expression = expressions.TernaryConditional(
existence_check, expression, expressions.NullLiteral)
# pylint: enable=redefined-variable-type
output_fields[output_name] = expression
return blocks.ConstructResult(output_fields) | [
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246,793 | kensho-technologies/graphql-compiler | graphql_compiler/compiler/compiler_frontend.py | _validate_schema_and_ast | def _validate_schema_and_ast(schema, ast):
"""Validate the supplied graphql schema and ast.
This method wraps around graphql-core's validation to enforce a stricter requirement of the
schema -- all directives supported by the compiler must be declared by the schema, regardless of
whether each directive is used in the query or not.
Args:
schema: GraphQL schema object, created using the GraphQL library
ast: abstract syntax tree representation of a graphql query
Returns:
list containing schema and/or query validation errors
"""
core_graphql_errors = validate(schema, ast)
# The following directives appear in the core-graphql library, but are not supported by the
# graphql compiler.
unsupported_default_directives = frozenset([
frozenset([
'include',
frozenset(['FIELD', 'FRAGMENT_SPREAD', 'INLINE_FRAGMENT']),
frozenset(['if'])
]),
frozenset([
'skip',
frozenset(['FIELD', 'FRAGMENT_SPREAD', 'INLINE_FRAGMENT']),
frozenset(['if'])
]),
frozenset([
'deprecated',
frozenset(['ENUM_VALUE', 'FIELD_DEFINITION']),
frozenset(['reason'])
])
])
# Directives expected by the graphql compiler.
expected_directives = {
frozenset([
directive.name,
frozenset(directive.locations),
frozenset(six.viewkeys(directive.args))
])
for directive in DIRECTIVES
}
# Directives provided in the parsed graphql schema.
actual_directives = {
frozenset([
directive.name,
frozenset(directive.locations),
frozenset(six.viewkeys(directive.args))
])
for directive in schema.get_directives()
}
# Directives missing from the actual directives provided.
missing_directives = expected_directives - actual_directives
if missing_directives:
missing_message = (u'The following directives were missing from the '
u'provided schema: {}'.format(missing_directives))
core_graphql_errors.append(missing_message)
# Directives that are not specified by the core graphql library. Note that Graphql-core
# automatically injects default directives into the schema, regardless of whether
# the schema supports said directives. Hence, while the directives contained in
# unsupported_default_directives are incompatible with the graphql-compiler, we allow them to
# be present in the parsed schema string.
extra_directives = actual_directives - expected_directives - unsupported_default_directives
if extra_directives:
extra_message = (u'The following directives were supplied in the given schema, but are not '
u'not supported by the GraphQL compiler: {}'.format(extra_directives))
core_graphql_errors.append(extra_message)
return core_graphql_errors | python | def _validate_schema_and_ast(schema, ast):
core_graphql_errors = validate(schema, ast)
# The following directives appear in the core-graphql library, but are not supported by the
# graphql compiler.
unsupported_default_directives = frozenset([
frozenset([
'include',
frozenset(['FIELD', 'FRAGMENT_SPREAD', 'INLINE_FRAGMENT']),
frozenset(['if'])
]),
frozenset([
'skip',
frozenset(['FIELD', 'FRAGMENT_SPREAD', 'INLINE_FRAGMENT']),
frozenset(['if'])
]),
frozenset([
'deprecated',
frozenset(['ENUM_VALUE', 'FIELD_DEFINITION']),
frozenset(['reason'])
])
])
# Directives expected by the graphql compiler.
expected_directives = {
frozenset([
directive.name,
frozenset(directive.locations),
frozenset(six.viewkeys(directive.args))
])
for directive in DIRECTIVES
}
# Directives provided in the parsed graphql schema.
actual_directives = {
frozenset([
directive.name,
frozenset(directive.locations),
frozenset(six.viewkeys(directive.args))
])
for directive in schema.get_directives()
}
# Directives missing from the actual directives provided.
missing_directives = expected_directives - actual_directives
if missing_directives:
missing_message = (u'The following directives were missing from the '
u'provided schema: {}'.format(missing_directives))
core_graphql_errors.append(missing_message)
# Directives that are not specified by the core graphql library. Note that Graphql-core
# automatically injects default directives into the schema, regardless of whether
# the schema supports said directives. Hence, while the directives contained in
# unsupported_default_directives are incompatible with the graphql-compiler, we allow them to
# be present in the parsed schema string.
extra_directives = actual_directives - expected_directives - unsupported_default_directives
if extra_directives:
extra_message = (u'The following directives were supplied in the given schema, but are not '
u'not supported by the GraphQL compiler: {}'.format(extra_directives))
core_graphql_errors.append(extra_message)
return core_graphql_errors | [
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This method wraps around graphql-core's validation to enforce a stricter requirement of the
schema -- all directives supported by the compiler must be declared by the schema, regardless of
whether each directive is used in the query or not.
Args:
schema: GraphQL schema object, created using the GraphQL library
ast: abstract syntax tree representation of a graphql query
Returns:
list containing schema and/or query validation errors | [
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] | f6079c6d10f64932f6b3af309b79bcea2123ca8f | https://github.com/kensho-technologies/graphql-compiler/blob/f6079c6d10f64932f6b3af309b79bcea2123ca8f/graphql_compiler/compiler/compiler_frontend.py#L922-L996 |
246,794 | kensho-technologies/graphql-compiler | graphql_compiler/compiler/compiler_frontend.py | graphql_to_ir | def graphql_to_ir(schema, graphql_string, type_equivalence_hints=None):
"""Convert the given GraphQL string into compiler IR, using the given schema object.
Args:
schema: GraphQL schema object, created using the GraphQL library
graphql_string: string containing the GraphQL to compile to compiler IR
type_equivalence_hints: optional dict of GraphQL interface or type -> GraphQL union.
Used as a workaround for GraphQL's lack of support for
inheritance across "types" (i.e. non-interfaces), as well as a
workaround for Gremlin's total lack of inheritance-awareness.
The key-value pairs in the dict specify that the "key" type
is equivalent to the "value" type, i.e. that the GraphQL type or
interface in the key is the most-derived common supertype
of every GraphQL type in the "value" GraphQL union.
Recursive expansion of type equivalence hints is not performed,
and only type-level correctness of this argument is enforced.
See README.md for more details on everything this parameter does.
*****
Be very careful with this option, as bad input here will
lead to incorrect output queries being generated.
*****
Returns:
IrAndMetadata named tuple, containing fields:
- ir_blocks: a list of IR basic block objects
- input_metadata: a dict of expected input parameters (string) -> inferred GraphQL type
- output_metadata: a dict of output name (string) -> OutputMetadata object
- query_metadata_table: a QueryMetadataTable object containing location metadata
Raises flavors of GraphQLError in the following cases:
- if the query is invalid GraphQL (GraphQLParsingError);
- if the query doesn't match the schema (GraphQLValidationError);
- if the query has more than one definition block (GraphQLValidationError);
- if the query has more than one selection in the root object (GraphQLCompilationError);
- if the query does not obey directive usage rules (GraphQLCompilationError);
- if the query provides invalid / disallowed / wrong number of arguments
for a directive (GraphQLCompilationError).
In the case of implementation bugs, could also raise ValueError, TypeError, or AssertionError.
"""
graphql_string = _preprocess_graphql_string(graphql_string)
try:
ast = parse(graphql_string)
except GraphQLSyntaxError as e:
raise GraphQLParsingError(e)
validation_errors = _validate_schema_and_ast(schema, ast)
if validation_errors:
raise GraphQLValidationError(u'String does not validate: {}'.format(validation_errors))
if len(ast.definitions) != 1:
raise AssertionError(u'Unsupported graphql string with multiple definitions, should have '
u'been caught in validation: \n{}\n{}'.format(graphql_string, ast))
base_ast = ast.definitions[0]
return _compile_root_ast_to_ir(schema, base_ast, type_equivalence_hints=type_equivalence_hints) | python | def graphql_to_ir(schema, graphql_string, type_equivalence_hints=None):
graphql_string = _preprocess_graphql_string(graphql_string)
try:
ast = parse(graphql_string)
except GraphQLSyntaxError as e:
raise GraphQLParsingError(e)
validation_errors = _validate_schema_and_ast(schema, ast)
if validation_errors:
raise GraphQLValidationError(u'String does not validate: {}'.format(validation_errors))
if len(ast.definitions) != 1:
raise AssertionError(u'Unsupported graphql string with multiple definitions, should have '
u'been caught in validation: \n{}\n{}'.format(graphql_string, ast))
base_ast = ast.definitions[0]
return _compile_root_ast_to_ir(schema, base_ast, type_equivalence_hints=type_equivalence_hints) | [
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Args:
schema: GraphQL schema object, created using the GraphQL library
graphql_string: string containing the GraphQL to compile to compiler IR
type_equivalence_hints: optional dict of GraphQL interface or type -> GraphQL union.
Used as a workaround for GraphQL's lack of support for
inheritance across "types" (i.e. non-interfaces), as well as a
workaround for Gremlin's total lack of inheritance-awareness.
The key-value pairs in the dict specify that the "key" type
is equivalent to the "value" type, i.e. that the GraphQL type or
interface in the key is the most-derived common supertype
of every GraphQL type in the "value" GraphQL union.
Recursive expansion of type equivalence hints is not performed,
and only type-level correctness of this argument is enforced.
See README.md for more details on everything this parameter does.
*****
Be very careful with this option, as bad input here will
lead to incorrect output queries being generated.
*****
Returns:
IrAndMetadata named tuple, containing fields:
- ir_blocks: a list of IR basic block objects
- input_metadata: a dict of expected input parameters (string) -> inferred GraphQL type
- output_metadata: a dict of output name (string) -> OutputMetadata object
- query_metadata_table: a QueryMetadataTable object containing location metadata
Raises flavors of GraphQLError in the following cases:
- if the query is invalid GraphQL (GraphQLParsingError);
- if the query doesn't match the schema (GraphQLValidationError);
- if the query has more than one definition block (GraphQLValidationError);
- if the query has more than one selection in the root object (GraphQLCompilationError);
- if the query does not obey directive usage rules (GraphQLCompilationError);
- if the query provides invalid / disallowed / wrong number of arguments
for a directive (GraphQLCompilationError).
In the case of implementation bugs, could also raise ValueError, TypeError, or AssertionError. | [
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] | f6079c6d10f64932f6b3af309b79bcea2123ca8f | https://github.com/kensho-technologies/graphql-compiler/blob/f6079c6d10f64932f6b3af309b79bcea2123ca8f/graphql_compiler/compiler/compiler_frontend.py#L1003-L1059 |
246,795 | kensho-technologies/graphql-compiler | graphql_compiler/debugging_utils.py | pretty_print_gremlin | def pretty_print_gremlin(gremlin):
"""Return a human-readable representation of a gremlin command string."""
gremlin = remove_custom_formatting(gremlin)
too_many_parts = re.split(r'([)}]|scatter)[ ]?\.', gremlin)
# Put the ) and } back on.
parts = [
too_many_parts[i] + too_many_parts[i + 1]
for i in six.moves.xrange(0, len(too_many_parts) - 1, 2)
]
parts.append(too_many_parts[-1])
# Put the . back on.
for i in six.moves.xrange(1, len(parts)):
parts[i] = '.' + parts[i]
indentation = 0
indentation_increment = 4
output = []
for current_part in parts:
if any([current_part.startswith('.out'),
current_part.startswith('.in'),
current_part.startswith('.ifThenElse')]):
indentation += indentation_increment
elif current_part.startswith('.back') or current_part.startswith('.optional'):
indentation -= indentation_increment
if indentation < 0:
raise AssertionError(u'Indentation became negative: {}'.format(indentation))
output.append((' ' * indentation) + current_part)
return '\n'.join(output).strip() | python | def pretty_print_gremlin(gremlin):
gremlin = remove_custom_formatting(gremlin)
too_many_parts = re.split(r'([)}]|scatter)[ ]?\.', gremlin)
# Put the ) and } back on.
parts = [
too_many_parts[i] + too_many_parts[i + 1]
for i in six.moves.xrange(0, len(too_many_parts) - 1, 2)
]
parts.append(too_many_parts[-1])
# Put the . back on.
for i in six.moves.xrange(1, len(parts)):
parts[i] = '.' + parts[i]
indentation = 0
indentation_increment = 4
output = []
for current_part in parts:
if any([current_part.startswith('.out'),
current_part.startswith('.in'),
current_part.startswith('.ifThenElse')]):
indentation += indentation_increment
elif current_part.startswith('.back') or current_part.startswith('.optional'):
indentation -= indentation_increment
if indentation < 0:
raise AssertionError(u'Indentation became negative: {}'.format(indentation))
output.append((' ' * indentation) + current_part)
return '\n'.join(output).strip() | [
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246,796 | kensho-technologies/graphql-compiler | graphql_compiler/debugging_utils.py | pretty_print_match | def pretty_print_match(match, parameterized=True):
"""Return a human-readable representation of a parameterized MATCH query string."""
left_curly = '{{' if parameterized else '{'
right_curly = '}}' if parameterized else '}'
match = remove_custom_formatting(match)
parts = re.split('({}|{})'.format(left_curly, right_curly), match)
inside_braces = False
indent_size = 4
indent = ' ' * indent_size
output = [parts[0]]
for current_index, current_part in enumerate(parts[1:]):
if current_part == left_curly:
if inside_braces:
raise AssertionError(u'Found open-braces pair while already inside braces: '
u'{} {} {}'.format(current_index, parts, match))
inside_braces = True
output.append(current_part + '\n')
elif current_part == right_curly:
if not inside_braces:
raise AssertionError(u'Found close-braces pair while not inside braces: '
u'{} {} {}'.format(current_index, parts, match))
inside_braces = False
output.append(current_part)
else:
if not inside_braces:
stripped_part = current_part.lstrip()
if stripped_part.startswith('.'):
# Strip whitespace before traversal steps.
output.append(stripped_part)
else:
# Do not strip whitespace before e.g. the RETURN keyword.
output.append(current_part)
else:
# Split out the keywords, initially getting rid of commas.
separate_keywords = re.split(', ([a-z]+:)', current_part)
# The first item in the separated list is the full first "keyword: value" pair.
# For every subsequent item, the keyword and value are separated; join them
# back together, outputting the comma, newline and indentation before them.
output.append(indent + separate_keywords[0].lstrip())
for i in six.moves.xrange(1, len(separate_keywords) - 1, 2):
output.append(',\n{indent}{keyword} {value}'.format(
keyword=separate_keywords[i].strip(),
value=separate_keywords[i + 1].strip(),
indent=indent))
output.append('\n')
return ''.join(output).strip() | python | def pretty_print_match(match, parameterized=True):
left_curly = '{{' if parameterized else '{'
right_curly = '}}' if parameterized else '}'
match = remove_custom_formatting(match)
parts = re.split('({}|{})'.format(left_curly, right_curly), match)
inside_braces = False
indent_size = 4
indent = ' ' * indent_size
output = [parts[0]]
for current_index, current_part in enumerate(parts[1:]):
if current_part == left_curly:
if inside_braces:
raise AssertionError(u'Found open-braces pair while already inside braces: '
u'{} {} {}'.format(current_index, parts, match))
inside_braces = True
output.append(current_part + '\n')
elif current_part == right_curly:
if not inside_braces:
raise AssertionError(u'Found close-braces pair while not inside braces: '
u'{} {} {}'.format(current_index, parts, match))
inside_braces = False
output.append(current_part)
else:
if not inside_braces:
stripped_part = current_part.lstrip()
if stripped_part.startswith('.'):
# Strip whitespace before traversal steps.
output.append(stripped_part)
else:
# Do not strip whitespace before e.g. the RETURN keyword.
output.append(current_part)
else:
# Split out the keywords, initially getting rid of commas.
separate_keywords = re.split(', ([a-z]+:)', current_part)
# The first item in the separated list is the full first "keyword: value" pair.
# For every subsequent item, the keyword and value are separated; join them
# back together, outputting the comma, newline and indentation before them.
output.append(indent + separate_keywords[0].lstrip())
for i in six.moves.xrange(1, len(separate_keywords) - 1, 2):
output.append(',\n{indent}{keyword} {value}'.format(
keyword=separate_keywords[i].strip(),
value=separate_keywords[i + 1].strip(),
indent=indent))
output.append('\n')
return ''.join(output).strip() | [
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246,797 | kensho-technologies/graphql-compiler | graphql_compiler/query_formatting/representations.py | represent_float_as_str | def represent_float_as_str(value):
"""Represent a float as a string without losing precision."""
# In Python 2, calling str() on a float object loses precision:
#
# In [1]: 1.23456789012345678
# Out[1]: 1.2345678901234567
#
# In [2]: 1.2345678901234567
# Out[2]: 1.2345678901234567
#
# In [3]: str(1.2345678901234567)
# Out[3]: '1.23456789012'
#
# The best way to ensure precision is not lost is to convert to string via Decimal:
# https://github.com/mogui/pyorient/pull/226/files
if not isinstance(value, float):
raise GraphQLInvalidArgumentError(u'Attempting to represent a non-float as a float: '
u'{}'.format(value))
with decimal.localcontext() as ctx:
ctx.prec = 20 # floats are max 80-bits wide = 20 significant digits
return u'{:f}'.format(decimal.Decimal(value)) | python | def represent_float_as_str(value):
# In Python 2, calling str() on a float object loses precision:
#
# In [1]: 1.23456789012345678
# Out[1]: 1.2345678901234567
#
# In [2]: 1.2345678901234567
# Out[2]: 1.2345678901234567
#
# In [3]: str(1.2345678901234567)
# Out[3]: '1.23456789012'
#
# The best way to ensure precision is not lost is to convert to string via Decimal:
# https://github.com/mogui/pyorient/pull/226/files
if not isinstance(value, float):
raise GraphQLInvalidArgumentError(u'Attempting to represent a non-float as a float: '
u'{}'.format(value))
with decimal.localcontext() as ctx:
ctx.prec = 20 # floats are max 80-bits wide = 20 significant digits
return u'{:f}'.format(decimal.Decimal(value)) | [
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246,798 | kensho-technologies/graphql-compiler | graphql_compiler/query_formatting/representations.py | coerce_to_decimal | def coerce_to_decimal(value):
"""Attempt to coerce the value to a Decimal, or raise an error if unable to do so."""
if isinstance(value, decimal.Decimal):
return value
else:
try:
return decimal.Decimal(value)
except decimal.InvalidOperation as e:
raise GraphQLInvalidArgumentError(e) | python | def coerce_to_decimal(value):
if isinstance(value, decimal.Decimal):
return value
else:
try:
return decimal.Decimal(value)
except decimal.InvalidOperation as e:
raise GraphQLInvalidArgumentError(e) | [
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246,799 | kensho-technologies/graphql-compiler | graphql_compiler/compiler/expressions.py | make_replacement_visitor | def make_replacement_visitor(find_expression, replace_expression):
"""Return a visitor function that replaces every instance of one expression with another one."""
def visitor_fn(expression):
"""Return the replacement if this expression matches the expression we're looking for."""
if expression == find_expression:
return replace_expression
else:
return expression
return visitor_fn | python | def make_replacement_visitor(find_expression, replace_expression):
def visitor_fn(expression):
"""Return the replacement if this expression matches the expression we're looking for."""
if expression == find_expression:
return replace_expression
else:
return expression
return visitor_fn | [
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