39 lines
1.3 KiB
Python
39 lines
1.3 KiB
Python
"""SQLAlchemy 异步数据库配置"""
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from contextlib import asynccontextmanager
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from sqlalchemy.ext.asyncio import create_async_engine, AsyncSession, async_sessionmaker
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from app.config import settings
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# SQLite 异步需要 aiosqlite
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db_url = settings.database_url.replace("sqlite:///", "sqlite+aiosqlite:///")
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engine = create_async_engine(db_url, echo=False)
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async_session = async_sessionmaker(engine, class_=AsyncSession, expire_on_commit=False)
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@asynccontextmanager
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async def get_db():
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session = async_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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"""创建所有表，并补充新增列"""
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from app.db.tables import metadata
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async with engine.begin() as conn:
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await conn.run_sync(metadata.create_all)
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# 补充新增列（SQLite ALTER TABLE ADD COLUMN，已存在会忽略）
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for col_sql in [
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"ALTER TABLE recommendations ADD COLUMN position_score REAL",
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"ALTER TABLE recommendations ADD COLUMN valuation_score REAL",
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"ALTER TABLE recommendations ADD COLUMN llm_analysis TEXT DEFAULT ''",
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]:
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try:
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await conn.execute(
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__import__("sqlalchemy").text(col_sql)
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)
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except Exception:
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pass # 列已存在，忽略
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