45 lines
1.4 KiB
Python
45 lines
1.4 KiB
Python
from typing import Any, Generic, Iterable, Optional, TypeVar
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from sqlalchemy import select
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from sqlalchemy.ext.asyncio import AsyncSession
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from sqlalchemy.orm import InstrumentedAttribute
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ModelType = TypeVar("ModelType")
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class BaseRepository(Generic[ModelType]):
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"""通用仓储基类，封装常见的增删改查操作。"""
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model: type[ModelType]
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def __init__(self, session: AsyncSession):
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self.session = session
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async def get(self, **filters: Any) -> Optional[ModelType]:
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stmt = select(self.model).filter_by(**filters)
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result = await self.session.execute(stmt)
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return result.scalars().first()
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async def list(self, *, filters: Optional[dict[str, Any]] = None) -> Iterable[ModelType]:
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stmt = select(self.model)
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if filters:
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stmt = stmt.filter_by(**filters)
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result = await self.session.execute(stmt)
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return result.scalars().all()
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async def add(self, instance: ModelType) -> ModelType:
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self.session.add(instance)
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await self.session.flush()
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return instance
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async def delete(self, instance: ModelType) -> None:
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await self.session.delete(instance)
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async def update_fields(self, instance: ModelType, **values: Any) -> ModelType:
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for key, value in values.items():
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if value is None:
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continue
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setattr(instance, key, value)
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await self.session.flush()
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return instance
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