Django的rest_framework的视图之基于通用类编写视图源码解析

我们上一篇博客讲解了如何使用mixins类实现rest_framework的视图，但是其中有很多的冗余的代码，我们这边在来优化一下

1、queryset的视图函数

首先看下对queryset操作的视图类是怎么写的

from rest_framework import mixins
from rest_framework import generics

class Auther_view(generics.ListCreateAPIView):
    queryset = models.Auther.objects.all()
    serializer_class = authermodelserializer

直接这样写就ok了，为什么呢？我们来看下generics.ListCreateAPIView类，不仅仅继承了我们之前写的3个类，还帮我们写了get和post方法，所以我们直接用上面的方法就是mixin类中的效果

class ListCreateAPIView(mixins.ListModelMixin,
                        mixins.CreateModelMixin,
                        GenericAPIView):
    """
    Concrete view for listing a queryset or creating a model instance.
    """
    def get(self, request, *args, **kwargs):
        return self.list(request, *args, **kwargs)

    def post(self, request, *args, **kwargs):
        return self.create(request, *args, **kwargs)

2、model对象的视图

类只需要继承generics.RetrieveUpdateDestoryAPIView在一个类就可以了

class Autherdetail_view(generics.RetrieveUpdateDestroyAPIView):
    queryset = models.Auther.objects.all()
    serializer_class = authermodelserializer

这个类generics.RetrieveUpdateDestoryAPIView同样继承了我们我们想要的其他四个类，而且还帮我们重写了get、delete、put方法

class RetrieveUpdateDestroyAPIView(mixins.RetrieveModelMixin,
                                   mixins.UpdateModelMixin,
                                   mixins.DestroyModelMixin,
                                   GenericAPIView):
    """
    Concrete view for retrieving, updating or deleting a model instance.
    """
    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 patch(self, request, *args, **kwargs):
        return self.partial_update(request, *args, **kwargs)

    def delete(self, request, *args, **kwargs):
        return self.destroy(request, *args, **kwargs)

至此，基于通用类实现rest_framework的视图就讲解完了

原文地址：https://www.cnblogs.com/bainianminguo/p/10463784.html