Implementation Engineer
43 lines
1021 B
Python
43 lines
1021 B
Python
"""SQLAlchemy async database engine and session."""
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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 get_settings
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class Base(DeclarativeBase):
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"""Declarative base for all models."""
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pass
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settings = get_settings()
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engine = create_async_engine(
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settings.database_url,
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echo=False,
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pool_pre_ping=True,
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)
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async_session = async_sessionmaker(
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engine,
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class_=AsyncSession,
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expire_on_commit=False,
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)
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async def get_db() -> AsyncSession:
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"""Dependency: yield an async database session."""
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async with async_session() as session:
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try:
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yield session
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except Exception:
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await session.rollback()
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raise
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finally:
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await session.close()
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async def init_db() -> None:
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"""Create all tables (for testing / first run)."""
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async with engine.begin() as conn:
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await conn.run_sync(Base.metadata.create_all)
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