74 lines
2.2 KiB
Python
74 lines
2.2 KiB
Python
"""
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数据库连接和会话管理
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"""
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import logging
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from sqlalchemy import create_engine, select
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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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logger = logging.getLogger(__name__)
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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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async def resolve_user_id(user_id_str: str, db_session: AsyncSession) -> int:
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"""
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将用户ID字符串转换为整数ID。
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对于guest用户（如 "guest_xxx"），在数据库中查找或创建对应的用户记录。
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"""
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try:
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return int(user_id_str)
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except (TypeError, ValueError):
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from models.database import User
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result = await db_session.execute(
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select(User).where(User.uid == user_id_str)
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)
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user = result.scalar_one_or_none()
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if user:
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return user.id
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# 创建新的guest用户并立即提交，确保后续连接能查到
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new_user = User(
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uid=user_id_str,
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username=user_id_str,
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nickname=user_id_str,
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role=1
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)
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db_session.add(new_user)
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await db_session.flush()
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await db_session.commit()
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logger.info(f"Created guest user: uid={user_id_str}, id={new_user.id}")
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return new_user.id
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