51 lines
1.1 KiB
Python
51 lines
1.1 KiB
Python
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"""
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数据库连接配置
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"""
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from sqlalchemy.ext.asyncio import create_async_engine, AsyncSession, async_sessionmaker
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from sqlalchemy.orm import declarative_base
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from sqlalchemy import event, text
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from app.config import settings
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# 创建异步引擎
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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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future=True,
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pool_size=20, # 增加连接池大小
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max_overflow=40,
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pool_pre_ping=True
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)
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# 创建异步会话工厂
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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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# 声明基类
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Base = declarative_base()
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async def get_db():
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"""获取数据库会话"""
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async with AsyncSessionLocal() as session:
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try:
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yield session
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finally:
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await session.close()
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async def init_db():
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"""初始化数据库表"""
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async with engine.begin() as conn:
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# PostgreSQL 不需要 WAL 设置
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await conn.run_sync(Base.metadata.create_all)
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async def close_db():
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"""关闭数据库连接"""
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await engine.dispose()
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