Django框架之DRF 基于mixins來封裝的視圖詳解

更新時間：2019年07月23日 09:14:22 作者：suguangti

今天小編就為大家分享一篇Django框架之DRF 基于mixins來封裝的視圖詳解，具有很好的參考價值，希望對大家有所幫助。一起跟隨小編過來看看吧

基礎(chǔ)視圖

示例環(huán)境搭建：新建一個Django項目，連接Mysql數(shù)據(jù)庫，配置路由、視圖函數(shù)、序列化單獨創(chuàng)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()),

]

# 視圖：

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.
# 基本視圖

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來封裝的視圖

其它不變，更改視圖：

# 基于mixins來封裝的視圖
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)

可以看出視圖類中還是有很多冗余代碼

mixins封裝再封裝，第三種方法

# 第三種寫法：
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

還是有冗余代碼

第四種寫法，再次封裝，全部寫在一個類中

# 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'})),

]

# 第四種寫法：5個接口寫在一個類中
from rest_framework.viewsets import ModelViewSet
class PublishView(ModelViewSet):
 queryset = models.Publish.objects.all()
 serializer_class = PublishSer

補充：

from rest_framework.viewsets import ViewSetMixin
from rest_framework.views import APIView
# ViewSetMixin 重寫了as_view方法
class Test(ViewSetMixin,APIView):

 def aaa(self,request):
  return Response()

以上這篇Django框架之DRF 基于mixins來封裝的視圖詳解就是小編分享給大家的全部內(nèi)容了，希望能給大家一個參考，也希望大家多多支持腳本之家。

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