Mixin扩展类

浅浅的花香味﹌ 2023-06-02 15:59 36阅读 0赞

特点：

1）继承自object

2）Mixin不能单独使用，需要配合GenericAPIView使用

**5个扩展类**：  
1）ListModelMixin：list

class ListModelMixin(object): def list(self, request, *args, **kwargs): """封装获取一组数据通用代码""" queryset = self.get_queryset() serializer = self.get_serializer(queryset, many=True) return Response(serializer.data)

2）CreateModelMixin：create

class CreateModelMixin(object): def create(self, request, *args, **kwargs): """封装新增数据通用代码""" serializer = self.get_serializer(data=request.data) serializer.is_valid(raise_exception=True) serializer.save() # 调用序列化器类中的create return Response(serializer.data, status=status.HTTP_201_CREATED)

3）RetrieveModelMixin：retrieve

class RetrieveModelMixin(object): def retrieve(self, request, *args, **kwargs): """封装获取指定数据的通用代码""" instance = self.get_object() serializer = self.get_serializer(instance) return Response(serializer.data)

4）UpdateModelMixin：update

class UpdateModelMixin(object): def update(self, request, *args, **kwargs): """封装更新指定数据的通用代码""" instance = self.get_object() serializer = self.get_serializer(instance, data=request.data) serializer.is_valid(raise_exception=True) serializer.save() # 调用序列化器类中的update return Response(serializer.data)

5）DestroyModelMixin：destroy

class DestroyModelMixin(object): def destroy(self, request, *args, **kwargs): """封装删除指定数据的通用代码""" instance = self.get_object() instance.delete() return Response(status=status.HTTP_204_NO_CONTENT)

### Mixin改写RestAPI接口 ###

# views.py from rest_framework.generics import GenericAPIView from rest_framework import mixins from rest_framework import status from booktest.serializers import BookInfoSerializer from booktest.models import BookInfo # /books/ class BookListView(mixins.ListModelMixin, mixins.CreateModelMixin, GenericAPIView): """ 获取所有图书、增加图书 """ # 指定视图所使用的序列化器类 serializer_class = BookInfoSerializer # 指定视图所使用的查询集 queryset = BookInfo.objects.all() def get(self, request): """ 获取所有的图书数据 """ return self.list(request) def post(self, request): """ 新增一个图书数据 """ return self.create(request) # /books/(?P<pk>\d+)/ class BookDetailView(mixins.RetrieveModelMixin, mixins.UpdateModelMixin, mixins.DestroyModelMixin, GenericAPIView): """ 获取、修改、删除指定图书 """ # 指定视图所使用的序列化器类 serializer_class = BookInfoSerializer # 指定视图所使用的查询集 queryset = BookInfo.objects.all() def get(self, request, pk): """ 获取指定图书 """ return self.retrieve(request, pk) def put(self, request, pk): """ 修改指定图书 """ return self.update(request, pk) def delete(self, request, pk): """ 删除指定图书： """ return self.destroy(request, pk)

转载于:https://www.cnblogs.com/oklizz/p/11278664.html