implementing Concurrent Requests in FastAPI 0.75.0 and SQLAlchemy 1.4.x
I've been working on this all day and I'm reviewing some code and I recently switched to I'm currently developing a web application using FastAPI 0.75.0 and SQLAlchemy 1.4.x, and I'm running into issues with concurrent requests... The application is designed to handle multiple endpoints that interact with a PostgreSQL database, and I am using async functions along with the `asyncpg` driver for database interactions. However, I am working with a `RuntimeError: Task <Task name='Task-1' coro=<...> cb=[<Future at ... state=finished raised ...>()]> got Future <Future at ... state=finished raised OperationalError('Could not connect to the database')> attached to a different loop` when multiple requests are made simultaneously. I've tried configuring the database session as follows: ```python from sqlalchemy.ext.asyncio import AsyncSession, create_async_engine from sqlalchemy.orm import sessionmaker DATABASE_URL = 'postgresql+asyncpg://user:password@localhost/dbname' engine = create_async_engine(DATABASE_URL, echo=True) AsyncSessionLocal = sessionmaker(engine, class_=AsyncSession, expire_on_commit=False) ``` I also ensure that my requests are wrapped in a session context like so: ```python from fastapi import FastAPI, Depends from sqlalchemy.ext.asyncio import AsyncSession app = FastAPI() async def get_db() -> AsyncSession: async with AsyncSessionLocal() as session: yield session @app.get('/items/{item_id}') async def read_item(item_id: int, db: AsyncSession = Depends(get_db)): # Database query logic here ``` Despite following the best practices for using SQLAlchemy with FastAPI, I still receive the `RuntimeError` when making concurrent requests. I suspect it might have to do with how the database connections are managed or the session's lifecycle during concurrent operations. Has anyone faced a similar scenario, or can anyone suggest ways to resolve this? Any insights on properly handling async database interactions with FastAPI would be greatly appreciated. Any ideas how to fix this? Cheers for any assistance! Am I missing something obvious? Thanks in advance!