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from sqlalchemy.ext.asyncio import create_async_engine, AsyncSession, async_sessionmaker
from sqlalchemy.orm import declarative_base
from ..core.config import settings
import contextlib
# Create async engine for FastAPI
async_engine = create_async_engine(
settings.DATABASE_URL,
echo=True,
future=True,
pool_pre_ping=True
)
# Create async session factory
AsyncSessionLocal = async_sessionmaker(
bind=async_engine,
class_=AsyncSession,
expire_on_commit=False
)
# Create declarative base for models
Base = declarative_base()
# Database dependency for FastAPI routes
async def get_db():
async with AsyncSessionLocal() as session:
try:
yield session
finally:
await session.close()
# Database access for background tasks and services
class Database:
def __init__(self):
self._session_factory = AsyncSessionLocal
@contextlib.asynccontextmanager
async def session(self):
"""Get a database session with automatic commit/rollback"""
session = self._session_factory()
try:
yield session
await session.commit()
except:
await session.rollback()
raise
finally:
await session.close()
async def get_session(self):
"""Get a session for manual management"""
return self._session_factory()
# Create singleton instance for database access
db = Database()
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