44 lines
1.5 KiB
Python
44 lines
1.5 KiB
Python
# app/database.py
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from sqlalchemy.ext.asyncio import create_async_engine, AsyncSession
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from sqlalchemy.orm import sessionmaker, declarative_base
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from app.config import settings
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# Ensure DATABASE_URL is set before proceeding
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if not settings.DATABASE_URL:
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raise ValueError("DATABASE_URL is not configured in settings.")
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# Create the SQLAlchemy async engine
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# pool_recycle=3600 helps prevent stale connections on some DBs
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engine = create_async_engine(
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settings.DATABASE_URL,
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echo=True, # Log SQL queries (useful for debugging)
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future=True, # Use SQLAlchemy 2.0 style features
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pool_recycle=3600 # Optional: recycle connections after 1 hour
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)
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# Create a configured "Session" class
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# expire_on_commit=False prevents attributes from expiring after commit
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AsyncSessionLocal = sessionmaker(
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bind=engine,
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class_=AsyncSession,
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expire_on_commit=False,
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autoflush=False,
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autocommit=False,
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)
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# Base class for our ORM models
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Base = declarative_base()
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# Dependency to get DB session in path operations
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async def get_async_session() -> AsyncSession: # type: ignore
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"""
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Dependency function that yields an AsyncSession.
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Ensures the session is closed after the request.
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"""
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async with AsyncSessionLocal() as session:
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yield session
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# The 'async with' block handles session.close() automatically.
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# Commit/rollback should be handled by the functions using the session.
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# Alias for backward compatibility
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get_db = get_async_session |