50 lines
1.2 KiB
Python
50 lines
1.2 KiB
Python
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"""Database engine + session factory."""
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from __future__ import annotations
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from contextlib import asynccontextmanager
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from typing import AsyncIterator
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from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker, create_async_engine
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from sqlalchemy.orm import DeclarativeBase
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from app.config import settings
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class Base(DeclarativeBase):
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pass
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_engine_kwargs: dict = dict(
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echo=False,
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pool_pre_ping=True,
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)
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# Pool size params only for Postgres/MySQL (not SQLite)
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if "sqlite" not in settings.database_url:
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_engine_kwargs.update(pool_size=10, max_overflow=20)
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engine = create_async_engine(settings.database_url, **_engine_kwargs)
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AsyncSessionLocal = async_sessionmaker(
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engine, class_=AsyncSession, expire_on_commit=False, autoflush=False
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)
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@asynccontextmanager
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async def get_db() -> AsyncIterator[AsyncSession]:
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async with AsyncSessionLocal() as session:
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try:
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yield session
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await session.commit()
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except Exception:
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await session.rollback()
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raise
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async def get_db_dep() -> AsyncIterator[AsyncSession]:
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"""FastAPI dependency."""
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async with AsyncSessionLocal() as session:
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try:
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yield session
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finally:
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await session.close()
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