80 lines
2.6 KiB
Python
80 lines
2.6 KiB
Python
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from typing import AsyncGenerator
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from sqlalchemy.ext.asyncio import AsyncSession, create_async_engine, async_sessionmaker
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from .base import Base
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from config import config_manager
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from loguru import logger
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class DatabaseManager:
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def __init__(self):
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self.engine = None
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self.async_session_maker = None
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self._config = None
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def _get_db_config(self):
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"""获取数据库配置"""
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if self._config is None:
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self._config = config_manager.get_settings().database
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return self._config
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async def init_db(self):
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"""初始化数据库连接"""
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db_config = self._get_db_config()
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logger.info("正在初始化数据库连接...")
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try:
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self.engine = create_async_engine(
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db_config.url,
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echo=db_config.echo,
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pool_size=db_config.pool_size,
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max_overflow=db_config.max_overflow,
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pool_timeout=db_config.pool_timeout,
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pool_recycle=db_config.pool_recycle,
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future=True
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)
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self.async_session_maker = async_sessionmaker(
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self.engine, class_=AsyncSession, expire_on_commit=False
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)
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# 创建所有表
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async with self.engine.begin() as conn:
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await conn.run_sync(Base.metadata.create_all)
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except Exception as e:
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logger.error(f"数据库连接初始化失败: {e}")
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logger.error(f"数据库连接URL: {db_config.url}")
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logger.error(f"数据库连接配置: {db_config}")
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logger.error(f"请启动config_tui.py来配置数据库连接")
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raise
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logger.info("数据库连接初始化完成")
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async def close_db(self):
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"""关闭数据库连接"""
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if self.engine:
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logger.info("正在关闭数据库连接...")
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await self.engine.dispose()
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logger.info("数据库连接已关闭")
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async def get_session(self) -> AsyncGenerator[AsyncSession, None]:
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"""获取数据库会话"""
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if not self.async_session_maker:
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raise RuntimeError("Database not initialized. Call init_db() first.")
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async with self.async_session_maker() 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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# 全局数据库管理器实例
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db_manager = DatabaseManager()
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# FastAPI 依赖函数
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async def get_db_session() -> AsyncGenerator[AsyncSession, None]:
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"""获取数据库会话的依赖函数，用于FastAPI路由"""
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async for session in db_manager.get_session():
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yield session
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