Update rag_routerv2.py

rag_routerv2.py

@@ -50,16 +50,17 @@ def init_db():
            created_time TIMESTAMP DEFAULT CURRENT_TIMESTAMP
        )
    ''')
-   db.execute('''
-       CREATE TABLE IF NOT EXISTS table_files (
-           id INTEGER PRIMARY KEY,
-           table_id TEXT NOT NULL,
-           filename TEXT NOT NULL,
-           file_path TEXT NOT NULL,
-           FOREIGN KEY (table_id) REFERENCES tables (table_id)
-       )
-   ''')
-   db.commit()
+    db.execute('''
+        CREATE TABLE IF NOT EXISTS table_files (
+            id INTEGER PRIMARY KEY,
+            table_id TEXT NOT NULL,
+            filename TEXT NOT NULL,
+            file_path TEXT NOT NULL,
+            FOREIGN KEY (table_id) REFERENCES tables (table_id),
+            UNIQUE(table_id, filename)
+        )
+    ''')
+    db.commit()
 
 # Pydantic models
 class CreateTableResponse(BaseModel):