67 lines
1.6 KiB
Python
67 lines
1.6 KiB
Python
"""Database connection and session management."""
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from typing import AsyncGenerator
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from sqlalchemy.ext.asyncio import AsyncEngine, AsyncSession, create_async_engine, async_sessionmaker
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from tradingagents.api.config import settings
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# Create async engine
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engine: AsyncEngine = create_async_engine(
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settings.DATABASE_URL,
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echo=settings.ENVIRONMENT == "development",
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future=True,
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pool_pre_ping=True,
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)
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# Create async session factory
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AsyncSessionLocal = 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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autocommit=False,
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autoflush=False,
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)
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async def get_db() -> AsyncGenerator[AsyncSession, None]:
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"""
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Dependency for getting database session.
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Yields:
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AsyncSession: Database session
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Example:
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@app.get("/items")
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async def get_items(db: AsyncSession = Depends(get_db)):
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result = await db.execute(select(Item))
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return result.scalars().all()
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"""
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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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finally:
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await session.close()
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async def init_db() -> None:
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"""
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Initialize database tables.
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Creates all tables defined in models.
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Use only for development - use Alembic migrations in production.
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"""
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from tradingagents.api.models import Base
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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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async def close_db() -> None:
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"""Close database connections."""
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await engine.dispose()
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