fastapi-database-setup

Set up an async database connection in FastAPI by configuring SQLAlchemy 2.0 with create_async_engine and async_sessionmaker. This creates an async engine and session factory to manage PostgreSQL connections using asyncpg.

Inject a database session into FastAPI routers using a get_db dependency. You apply Depends(get_db) to your route functions to provide a clean, reusable database session for each request.

Database connections leak without proper lifecycle management. Implementing an explicit shutdown routine and an async_sessionmaker ensures safe session disposal, preventing connection leaks during application shutdown.

Yes, this async database setup is explicitly designed for PostgreSQL using asyncpg. It configures the SQLAlchemy 2.0 async engine to leverage asyncpg for non-blocking database operations.

The best way to manage database session lifecycle is using a get_db dependency combined with an explicit shutdown routine. This ensures safe session creation and disposal, preventing leaks.