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```python # AI Dev Tool: FastAPI Pydantic v2 Micro-SaaS Boilerplate with PostgreSQL Vector Search Extension # ================================================================================================= from fastapi import FastAPI, HTTPException from fastapi.responses import JSONResponse from pydantic import BaseModel from typing import List, Optional import psycopg2 from psycopg2 import Error import uvicorn from fastapi.middleware.cors import CORSMiddleware # Define the FastAPI application app = FastAPI() # Define CORS configuration origins = [ "http://localhost:8000", "http://localhost:3000", ] app.add_middleware( CORSMiddleware, allow_origins=origins, allow_credentials=True, allow_methods=["*"], allow_headers=["*"], ) # Define the PostgreSQL connection parameters POSTGRES_HOST = "localhost" POSTGRES_PORT = 5432 POSTGRES_DB = "mydatabase" POSTGRES_USER = "myuser" POSTGRES_PASSWORD = "mypassword" # Define the PostgreSQL connection function def connect_to_postgres(): try: connection = psycopg2.connect( host=POSTGRES_HOST, port=POSTGRES_PORT, database=POSTGRES_DB, user=
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