prompts.py

from examples import get_example_selector
from langchain_core.prompts import (
    ChatPromptTemplate,
    MessagesPlaceholder,
    FewShotChatMessagePromptTemplate,
    PromptTemplate
)

example_prompt = ChatPromptTemplate.from_messages([
    ("human", "{input}\nSQLQuery:"),
    ("ai", "{query}"),
])

def create_prompts(api_key):
    example_selector = get_example_selector(api_key)
    
    few_shot_prompt = FewShotChatMessagePromptTemplate(
        example_prompt=example_prompt,
        example_selector=example_selector,
        input_variables=["input", "top_k"],
    )

    final_prompt = ChatPromptTemplate.from_messages([
        ("system", "You are a Postgres SQL expert. Given an input question, create a syntactically correct Postgres SQL query to run. Unless otherwise specified.\n\nHere is the relevant table info: {table_info}\n\nBelow are a number of examples of questions and their corresponding SQL queries."),
        few_shot_prompt,
        MessagesPlaceholder(variable_name="messages"),
        ("human", "{input}"),
    ])

    answer_prompt = PromptTemplate.from_template(
        """Given the following user question, corresponding SQL query, and SQL result, answer the user question.

    Question: {question}
    SQL Query: {query}
    SQL Result: {result}
    Answer: """
    )

    return final_prompt, answer_prompt