37 lines
765 B
Python
37 lines
765 B
Python
from __future__ import annotations
|
|
|
|
from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker, create_async_engine
|
|
|
|
from app.core.config import get_settings
|
|
|
|
|
|
def create_engine():
|
|
"""
|
|
创建异步 Engine。
|
|
|
|
注意：连接串从环境变量 `DATABASE_URL` 读取。
|
|
"""
|
|
|
|
settings = get_settings()
|
|
return create_async_engine(settings.database_url, pool_pre_ping=True)
|
|
|
|
|
|
engine = create_engine()
|
|
|
|
AsyncSessionLocal: async_sessionmaker[AsyncSession] = async_sessionmaker(
|
|
bind=engine,
|
|
expire_on_commit=False,
|
|
autoflush=False,
|
|
autocommit=False,
|
|
)
|
|
|
|
|
|
async def get_db() -> AsyncSession:
|
|
"""
|
|
FastAPI 依赖：获取数据库会话。
|
|
"""
|
|
|
|
async with AsyncSessionLocal() as session:
|
|
yield session
|
|
|