33 lines
1.1 KiB
Python
33 lines
1.1 KiB
Python
from sqlalchemy.ext.asyncio import AsyncSession, create_async_engine, async_sessionmaker
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from sqlalchemy.orm import DeclarativeBase
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from app.core.config import settings
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settings.data_path.mkdir(parents=True, exist_ok=True)
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settings.upload_path.mkdir(parents=True, exist_ok=True)
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engine = create_async_engine(settings.database_url, echo=False)
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async_session = async_sessionmaker(engine, class_=AsyncSession, expire_on_commit=False)
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class Base(DeclarativeBase):
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pass
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async def init_db():
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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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await _migrate()
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async def _migrate():
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"""轻量迁移：SQLite 下给已有 segments 表补 embedding 列（create_all 不会改老表）。"""
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async with engine.begin() as conn:
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rows = (await conn.exec_driver_sql("PRAGMA table_info(segments)")).all()
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cols = {row[1] for row in rows}
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if rows and "embedding" not in cols:
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await conn.exec_driver_sql("ALTER TABLE segments ADD COLUMN embedding TEXT")
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async def get_db():
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async with async_session() as session:
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yield session |