47 lines
980 B
Python
47 lines
980 B
Python
"""SQLAlchemy 异步引擎与会话。"""
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from sqlalchemy.ext.asyncio import (
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AsyncSession,
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async_sessionmaker,
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create_async_engine,
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)
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from sqlalchemy.orm import DeclarativeBase
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from app.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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future=True,
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)
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async_session_maker = 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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class Base(DeclarativeBase):
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"""所有 ORM 模型的基类。"""
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pass
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async def init_db() -> None:
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"""创建所有表（开发/迁移用）。"""
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# 确保 ORM 模型已导入，从而注册到 Base.metadata
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import app.models.llm # noqa: F401
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import app.models.studio # noqa: F401
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async with engine.begin() as conn:
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await conn.run_sync(Base.metadata.create_all)
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async def close_db() -> None:
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"""关闭数据库连接。"""
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await engine.dispose()
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