65 lines
2.5 KiB
Python
65 lines
2.5 KiB
Python
from typing import Type, TypeVar, Generic, List, Optional, Any, Dict
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from sqlalchemy.orm import Session
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from sqlalchemy.ext.declarative import DeclarativeMeta
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ModelType = TypeVar("ModelType")
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class BaseService(Generic[ModelType]):
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def __init__(self, model: Type[ModelType]):
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self.model = model
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def create(self, db: Session, obj_data: Dict[str, Any]) -> ModelType:
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"""创建记录"""
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db_obj = self.model(**obj_data)
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db.add(db_obj)
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db.commit()
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db.refresh(db_obj)
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return db_obj
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def get_by_id(self, db: Session, obj_id: int) -> Optional[ModelType]:
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"""根据ID获取记录"""
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return db.query(self.model).filter(self.model.id == obj_id).first()
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def get_all(self, db: Session, skip: int = 0, limit: int = 100) -> List[ModelType]:
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"""获取所有记录"""
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return db.query(self.model).offset(skip).limit(limit).all()
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def update(self, db: Session, obj_id: int, update_data: Dict[str, Any]) -> Optional[ModelType]:
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"""更新记录"""
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db_obj = self.get_by_id(db, obj_id)
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if db_obj:
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for field, value in update_data.items():
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if hasattr(db_obj, field):
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setattr(db_obj, field, value)
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db.commit()
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db.refresh(db_obj)
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return db_obj
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return None
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def delete(self, db: Session, obj_id: int) -> bool:
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"""删除记录"""
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db_obj = self.get_by_id(db, obj_id)
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if db_obj:
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db.delete(db_obj)
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db.commit()
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return True
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return False
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def get_by_field(self, db: Session, field_name: str, field_value: Any) -> List[ModelType]:
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"""根据字段值查询记录"""
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if hasattr(self.model, field_name):
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field = getattr(self.model, field_name)
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return db.query(self.model).filter(field == field_value).all()
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return []
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def search_by_conditions(self, db: Session, conditions: Dict[str, Any]) -> List[ModelType]:
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"""根据多个条件搜索记录"""
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query = db.query(self.model)
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for field_name, field_value in conditions.items():
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if hasattr(self.model, field_name) and field_value is not None:
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field = getattr(self.model, field_name)
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if isinstance(field_value, str):
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query = query.filter(field.like(f"{field_value}"))
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else:
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query = query.filter(field == field_value)
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return query.all() |