duxingchen
17105dc9c2
- backend: FastAPI 后端服务 (Python) - frontend: React + Tauri 前端应用 - docker-compose.yml: 容器编排配置
25 lines
839 B
Python
25 lines
839 B
Python
"""数据库连接 — 异步引擎 + 连接池"""
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from sqlalchemy.ext.asyncio import create_async_engine, async_sessionmaker, AsyncSession
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from app.core.config import settings
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engine = create_async_engine(
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settings.DATABASE_URL,
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echo=settings.DEBUG,
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pool_size=20, # 连接池常驻连接数
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max_overflow=10, # 超出 pool_size 时最多再创建的连接数
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pool_recycle=3600, # 连接回收时间（秒），防止 MySQL 8 小时断连
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pool_pre_ping=True, # 每次取出连接前先 ping 检测可用性
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)
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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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)
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async def get_db() -> AsyncSession:
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"""FastAPI 依赖注入：每次请求获取一个数据库会话"""
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async with AsyncSessionLocal() as session:
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yield session
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