24 lines
756 B
Python
24 lines
756 B
Python
from typing import AsyncIterator
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from fastapi import Request
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from sqlalchemy.ext.asyncio import (
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AsyncEngine,
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AsyncSession,
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async_sessionmaker,
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create_async_engine,
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)
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def create_engine(database_url: str) -> AsyncEngine:
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return create_async_engine(database_url)
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def create_session_factory(engine: AsyncEngine) -> async_sessionmaker[AsyncSession]:
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# expire_on_commit=False keeps ids/attributes readable after commit
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return async_sessionmaker(engine, expire_on_commit=False)
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async def get_session(request: Request) -> AsyncIterator[AsyncSession]:
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"""FastAPI dependency: one session per request, factory is set in the app lifespan."""
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async with request.app.state.session_factory() as session:
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yield session
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