42 lines
1.2 KiB
Python
42 lines
1.2 KiB
Python
"""
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数据库连接和会话管理
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"""
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from sqlalchemy import create_engine
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from sqlalchemy.ext.asyncio import create_async_engine, AsyncSession, async_sessionmaker
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from sqlalchemy.orm import sessionmaker
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from config.settings import settings
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# 创建异步引擎
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# 将数据库URL转换为asyncmy驱动（用于异步操作）
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# 首先尝试pymysql到asyncmy的转换，如果失败则尝试mysql到mysql+asyncmy的转换
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if 'mysql+pymysql' in settings.DATABASE_URL:
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async_db_url = settings.DATABASE_URL.replace('mysql+pymysql', 'mysql+asyncmy')
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else:
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async_db_url = settings.DATABASE_URL.replace('mysql', 'mysql+asyncmy')
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async_engine = create_async_engine(
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async_db_url,
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echo=settings.DEBUG,
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pool_pre_ping=True
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)
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# 创建会话工厂
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AsyncSessionLocal = async_sessionmaker(
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bind=async_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():
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"""获取数据库会话的依赖函数"""
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async with AsyncSessionLocal() as session:
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try:
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yield session
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await session.commit()
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except Exception:
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await session.rollback()
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raise
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finally:
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await session.close()
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