201 lines
8.5 KiB
Python
201 lines
8.5 KiB
Python
from typing import TypeVar, Generic, Any, List, get_args, Union, Optional
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from sqlalchemy.orm import Session
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from Utils.CommonUtils import get_sqlalchemy_model_fields
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from Utils.SqlAlchemyUtils import Base, get_db
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from pydantic import BaseModel, create_model
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from fastapi import APIRouter, Depends
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from pydantic.generics import GenericModel
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class QueryBase(BaseModel):
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page_size: Union[int, None]
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page: Union[int, None]
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class ItemId(BaseModel):
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id: Union[str, int]
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ModelType = TypeVar("ModelType", bound=BaseModel)
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CreateSchemaType = TypeVar("CreateSchemaType", bound=BaseModel)
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IdSchemaType = TypeVar("IdSchemaType", bound=BaseModel)
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UpdateSchemaType = TypeVar("UpdateSchemaType", bound=BaseModel)
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QuerySchemaType = TypeVar("QuerySchemaType", bound=QueryBase)
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DbModelType = TypeVar("DbModelType", bound=Base)
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DataType = TypeVar("DataType", BaseModel, Any)
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class BaseResponseModel(GenericModel, Generic[DataType]):
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state: int
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msg: str
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data: DataType
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class CRUDBase(Generic[DbModelType, ModelType, IdSchemaType, CreateSchemaType, UpdateSchemaType, QuerySchemaType]):
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def __init__(self,
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db_model: DbModelType,
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model_type: BaseModel,
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id_schema_type: IdSchemaType,
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create_schema_type: CreateSchemaType,
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update_schema_type: UpdateSchemaType,
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query_schema_type: QuerySchemaType, name: str, chinese_name: str = ''):
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self.db_model = db_model
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self.name = name
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self.model_type = model_type
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self.id_schema_type = id_schema_type
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self.create_schema_type = create_schema_type
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self.update_schema_type = update_schema_type
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self.query_schema_type = query_schema_type
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self.summary_name = chinese_name if chinese_name else self.name
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def mount(self, router: APIRouter):
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for key in self.__dir__():
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if key.endswith('_create'):
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getattr(self, key)(router)
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def add_route_func_create(self, router: APIRouter):
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create_schema_type = self.create_schema_type
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@router.post(f'/{self.name}/add',
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response_model=BaseResponseModel[self.model_type],
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summary=f"添加{self.summary_name}")
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def add_route_func(create_model_obj: create_schema_type, db: Session = Depends(get_db)):
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new_item = self.add(db, create_model_obj)
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item_info = new_item.to_dict()
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return BaseResponseModel(state=1, msg="", data=self.model_type(**item_info))
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return add_route_func
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def update_route_func_create(self, router: APIRouter):
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update_schema_type = self.update_schema_type
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@router.post(f'/{self.name}/update',
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response_model=BaseResponseModel[Any],
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summary=f"修改{self.summary_name}")
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def update_route_func(update_model_obj: update_schema_type, db: Session = Depends(get_db)):
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self.update(db, update_model_obj)
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return BaseResponseModel(state=1, msg="", data={})
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return update_route_func
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def delete_route_func_create(self, router: APIRouter):
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@router.post(f'/{self.name}/delete',
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response_model=BaseResponseModel[Any],
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summary=f"删除{self.summary_name}")
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def delete_route_func(item_id: ItemId, db: Session = Depends(get_db)):
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self.delete(db, item_id.id)
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return BaseResponseModel(state=1, msg="", data={})
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return delete_route_func
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def get_route_func_create(self, router: APIRouter):
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id_schema_type = self.id_schema_type
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@router.post(f'/{self.name}/get',
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response_model=BaseResponseModel[self.model_type],
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summary=f"获取{self.summary_name}")
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def get_route_func(item_id: id_schema_type, db: Session = Depends(get_db)):
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index_value = list(item_id.dict().values())[0]
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item = self.get(db, index_value)
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return BaseResponseModel(state=1, msg="", data=self.model_type(**item.to_dict()))
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return get_route_func
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def query_route_func_create(self, router: APIRouter):
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model_type = self.model_type
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query_schema_type = self.query_schema_type
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locals_temp = {'model_type': model_type, 'BaseModel': BaseModel, 'ModelType': ModelType, 'Generic': Generic,
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'List': List}
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class_name = f"{self.name}QueryRes"
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exec(f"class {class_name}(BaseModel, Generic[ModelType]):\n count: int\n item_list: List[model_type]",
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locals_temp)
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QueryRes = locals_temp[class_name]
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@router.post(f'/{self.name}/query',
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response_model=BaseResponseModel[QueryRes],
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summary=f"查询{self.summary_name}")
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def query_route_func(params: query_schema_type, db: Session = Depends(get_db)):
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count, query = self.query(db, params)
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item_list = [item.to_dict() for item in query]
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return BaseResponseModel(state=1, msg="", data=QueryRes(count=count, item_list=item_list))
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return query_route_func
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def add(self, db: Session, create_model_obj: CreateSchemaType) -> ModelType:
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new_item = self.db_model(**create_model_obj.dict())
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db.add(new_item)
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db.commit()
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db.refresh(new_item)
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return new_item
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def delete(self, db: Session, item_id):
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if type(item_id) == list:
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db.query(self.db_model).filter(getattr(self.db_model, 'id').in_(item_id)).delete()
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else:
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db.query(self.db_model).filter_by(id=item_id).delete()
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db.commit()
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def update(self, db: Session, update_model_obj: UpdateSchemaType):
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db.query(self.db_model).filter_by(id=update_model_obj.id).update(update_model_obj.dict())
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db.commit()
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def query(self, db: Session, params: QuerySchemaType) -> [int]:
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params_dict = params.dict()
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query = db.query(self.db_model)
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for key, value in params_dict.items():
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if key not in ['page', 'page_size'] and value is not None:
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if type(value) == str:
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query = query.filter(getattr(self.db_model, key).like(f'%{value}%'))
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if type(value) in [int, float, bool]:
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query = query.filter_by(**{key: value})
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count = query.count()
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if params.page is not None and params.page_size is not None:
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query = query.offset((params.page - 1) * params.page_size).limit(params.page_size).all()
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return count, query
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def get(self, db: Session, item_id: IdSchemaType) -> ModelType:
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return db.query(self.db_model).get(item_id)
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def create_crud_model(db_model: Base, name, auto_create_keys=['id'], index_key='id'):
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"""
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创建CRUD所需模型
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:param db_model: 数据库模型
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:param name: 名称
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:param auto_create_keys: 自动生成的keys
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:param index_key: 索引key
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:return:
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"""
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fields_dict = get_sqlalchemy_model_fields(db_model)
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model = create_model(f"{name}Model", **fields_dict)
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class config:
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arbitrary_types_allowed = False
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model_id = create_model(f'{name}IdModel', **{index_key: fields_dict[index_key]})
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model_create = create_model(f"{name}Create",
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**{key: item for key, item in fields_dict.items() if key not in auto_create_keys})
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model_update = create_model(f"{name}Update", __config__=config,
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**{key: item if key == index_key else (
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eval(f'Optional[{item[0].__name__}]', globals()), item[1]) for key, item in
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fields_dict.items() if key not in auto_create_keys})
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model_query = create_model(f"{name}Query", __config__=config,
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**{key: (eval(f'Optional[{item[0].__name__}]', globals()), item[1]) for key, item in
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fields_dict.items()})
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return [model, model_id, model_create, model_update, model_query]
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def auto_create_crud(db_model: Base, name, chinese_name="", auto_create_keys=['id'], index_key='id'):
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"""
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自动创建CRUD类
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"""
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[model, model_id, model_create, model_update, model_query] = create_crud_model(db_model, name,
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auto_create_keys, index_key)
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class Crud(CRUDBase[db_model, model, model_id, model_create, model_update, model_query]):
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pass
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crud = Crud(db_model, model, model_id, model_create, model_update, model_query, name, chinese_name)
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return crud
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