69 lines
1.5 KiB
Python
69 lines
1.5 KiB
Python
"""
|
|
Database Configuration and Session Management
|
|
支持 SQLite 和 PostgreSQL
|
|
"""
|
|
|
|
from sqlalchemy.ext.asyncio import AsyncSession, create_async_engine, async_sessionmaker
|
|
from sqlalchemy.orm import DeclarativeBase
|
|
from sqlalchemy import create_engine
|
|
from app.core.config import get_settings
|
|
|
|
settings = get_settings()
|
|
|
|
|
|
def get_engine_config():
|
|
"""根据数据库类型返回引擎配置"""
|
|
if settings.DATABASE_URL.startswith("sqlite"):
|
|
return {"echo": settings.DEBUG}
|
|
else:
|
|
return {
|
|
"echo": settings.DEBUG,
|
|
"pool_pre_ping": True,
|
|
"pool_size": 10,
|
|
"max_overflow": 20,
|
|
}
|
|
|
|
|
|
# Async engine for FastAPI
|
|
async_engine = create_async_engine(
|
|
settings.DATABASE_URL,
|
|
**get_engine_config()
|
|
)
|
|
|
|
# Sync engine for migrations
|
|
sync_engine = create_engine(
|
|
settings.DATABASE_URL_SYNC,
|
|
echo=settings.DEBUG,
|
|
pool_pre_ping=True,
|
|
)
|
|
|
|
|
|
# Async session factory
|
|
AsyncSessionLocal = async_sessionmaker(
|
|
async_engine,
|
|
class_=AsyncSession,
|
|
expire_on_commit=False,
|
|
autocommit=False,
|
|
autoflush=False,
|
|
)
|
|
|
|
|
|
class Base(DeclarativeBase):
|
|
"""Base class for all models"""
|
|
pass
|
|
|
|
|
|
async def init_db():
|
|
"""Initialize database tables"""
|
|
async with async_engine.begin() as conn:
|
|
await conn.run_sync(Base.metadata.create_all)
|
|
|
|
|
|
async def get_db() -> AsyncSession:
|
|
"""Dependency for getting database session"""
|
|
async with AsyncSessionLocal() as session:
|
|
try:
|
|
yield session
|
|
finally:
|
|
await session.close()
|