Django框架之DRF 基于mixins来封装的视图详解

框架(架构)  /  管理员 发布于 7年前   236

基础视图

示例环境搭建：新建一个Django项目，连接Mysql数据库，配置路由、视图函数、序列化单独创建py文件

# 配置路由from django.conf.urls import urlfrom django.contrib import adminfrom app01 import viewsurlpatterns = [ url(r'^admin/', admin.site.urls), url(r'^PublishView/', views.PublishView.as_view()), url(r'^PublishDetailView/(?P<pk>\d+)', views.PublishDetailView.as_view()),]

# 视图：from django.shortcuts import renderfrom rest_framework.views import APIViewfrom app01 import modelsfrom app01.MySer import BookSer,PublishSer,AuthorSerfrom rest_framework.response import Response# Create your views here.# 基本视图class PublishView(APIView): def get(self,request):  publish_list = models.Publish.objects.all()  bs = PublishSer(publish_list, many=True)  return Response(bs.data) def post(self, request):  bs = PublishSer(data=request.data)  if bs.is_valid():   bs.save()   return Response(bs.data)  else:   return Response(bs.errors)class PublishDetailView(APIView): def get(self, request, pk):  publish_obj = models.Publish.objects.filter(pk=pk).first()  bs = PublishSer(publish_obj, many=False)  return Response(bs.data) def put(self, request, pk):  publish_obj = models.Publish.objects.filter(pk=pk).first()  bs = PublishSer(data=request.data, instance=publish_obj)  if bs.is_valid():   bs.save()   return Response(bs.data)  else:   return Response(bs.data) def delete(self, request, pk):  models.Publish.objects.filter(pk=pk).delete()  return Response("")

# MySer.pyfrom rest_framework import serializersfrom app01 import modelsclass BookSer(serializers.ModelSerializer): class Meta:  model = models.Book  fields = '__all__'class PublishSer(serializers.ModelSerializer): class Meta:  model = models.Publish  fields = '__all__'class AuthorSer(serializers.ModelSerializer): class Meta:  model = models.Author  fields = '__all__'

基于mixins来封装的视图

其它不变，更改视图：

# 基于mixins来封装的视图from rest_framework.mixins import CreateModelMixin,\         ListModelMixin,\         RetrieveModelMixin,\         DestroyModelMixin,\         UpdateModelMixinfrom rest_framework.generics import GenericAPIViewclass PublishView(CreateModelMixin, ListModelMixin, GenericAPIView): queryset = models.Publish.objects.all() serializer_class = PublishSer def get(self, request, *args, **kwargs):  return self.list(request, *args, **kwargs) def post(self, request, *args, **kwargs):  return self.create(request, *args, **kwargs)class PublishDetailView(RetrieveModelMixin, UpdateModelMixin, DestroyModelMixin, GenericAPIView): queryset = models.Publish.objects.all() serializer_class = PublishSer def get(self, request, *args, **kwargs):  return self.retrieve(request, *args, **kwargs) def put(self, request, *args, **kwargs):  return self.update(request, *args, **kwargs) def delete(self, request, *args, **kwargs):  return self.destroy(request, *args, **kwargs)

可以看出视图类中还是有很多冗余代码

mixins封装再封装，第三种方法

# 第三种写法：from rest_framework.generics import CreateAPIView,\         ListCreateAPIView,\         DestroyAPIView,\         RetrieveUpdateDestroyAPIViewclass PublishView(ListCreateAPIView): queryset = models.Publish.objects.all() serializer_class = PublishSerclass PublishDetailView(RetrieveUpdateDestroyAPIView): queryset = models.Publish.objects.all() serializer_class = PublishSer

还是有冗余代码

第四种写法，再次封装，全部写在一个类中

# 路由from django.conf.urls import urlfrom django.contrib import adminfrom app01 import viewsurlpatterns = [ url(r'^admin/', admin.site.urls), url(r'^publish/$', views.PublishView.as_view({'get': 'list', 'post': 'create'})), url(r'^publish/(?P<pk>\d+)$', views.PublishView.as_view({'get': 'retrieve', 'put': 'update', 'delete': 'destroy'})),]

# 第四种写法：5个接口写在一个类中from rest_framework.viewsets import ModelViewSetclass PublishView(ModelViewSet): queryset = models.Publish.objects.all() serializer_class = PublishSer

补充：

from rest_framework.viewsets import ViewSetMixinfrom rest_framework.views import APIView# ViewSetMixin 重写了as_view方法class Test(ViewSetMixin,APIView): def aaa(self,request):  return Response()

以上这篇Django框架之DRF 基于mixins来封装的视图详解就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持。