Django框架之DRF 基于mixins来封装的视图详解
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 url from django.contrib import admin from app01 import views urlpatterns = [ 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 render
from rest_framework.views import APIView
from app01 import models
from app01.MySer import BookSer,PublishSer,AuthorSer
from 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.py from rest_framework import serializers from app01 import models class 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,\
UpdateModelMixin
from rest_framework.generics import GenericAPIView
class 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,\
RetrieveUpdateDestroyAPIView
class PublishView(ListCreateAPIView):
queryset = models.Publish.objects.all()
serializer_class = PublishSer
class 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 url
from django.contrib import admin
from app01 import views
urlpatterns = [
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 ModelViewSet class PublishView(ModelViewSet): queryset = models.Publish.objects.all() serializer_class = PublishSer
补充：
from rest_framework.viewsets import ViewSetMixin from 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【听图阁-专注于Python设计】。
