Django rest-framework框架-组件之视图

视图：
   a. django
      class Test(View):
      	...
   b. rest_framework
      class Test(APIView):
      	...
   c. GenericAPIView 一般不用这个类来做视图

from rest_framework.generics import GenericAPIView
class ViewView(GenericAPIView):
	queryset = models.Role.objects.all()
	serializer_class = PagerSerializer
	pagination_class = PageNumberPagination

	def get(self,reuqest,*args,**kwargs):
		#获取数据  models.Role.objects.all()
		roles = self.get_queryset()
		pager_roles = self.paginate_queryset(roles)
		#序列化
		self.get_serializer(instance=pager_roles,many=True)
		return Response(ser.data)

   d. GenericViewSet(ViewSetMixin, generics.GenericAPIView) 继承两个父类

#需要路由传参数  url(r'^(?P<version>[v1|v2]+)/v1/$',views.ViewView.as_view({'get':'list','post':'post_list'})),
#参数传递给 ViewView get方法执行list  post方法执行post_list
from rest_framework.viewsets import GenericViewSet
class ViewView(GenericViewSet):
	  def list(self,request,*args,**kwargs):
	  return Response('GET')
	  def post_list(self,request,*args,**kwargs):
	  return Response('POST')

   e. ModelViewSet(
   			mixins.CreateModelMixin,
   			mixins.RetrieveModelMixin,
   			mixins.updateModelMinxin,
   			mixins.DestroyModelMinxin,
   			mixins.ListModelMixin,
   			GenericViewSet)

#需要路由传参数  url(r'^(?P<version>[v1|v2]+)/v1/(?P<pk>\d+)/$',views.ViewView.as_view({'get':'retrieve','delete':'destroy','put':'update','patch':'partial_update'})),
# 继承ModelViewSet 所有的 增删改查的功能都有了
# 如果是get请求  retrieve获取单条数据 根据传的参数pk来查询
# 如果是delete请求  destroy删除数据
# 如果是put请求  update更新数据
# 如果是patch请求  partial_update 部分更新数据
# list 查询所有数据
# create 增加数据
# 需要关注路由系统 {'get':'retrieve','delete':'destroy','put':'update','patch':'partial_update'} {'get':'list','post':'post_list'}
from rest_framework.viewsets import ModelViewSet
class ViewView(ModelViewSet):
	  queryset = models.Role.objects.all()
	  serializer_class = PagerSerializer
	  pagination_class = PageNumberPagination

总结：
    - 大部分使用 APIView
    - 也可以使用 GenericViewSet 在路由中区分get,post
    - 基本的增删改查实现 继承 ModelViewSet
    - 增删 继承GenericViewSet， CreateModelMixin，DestroyModelMinxin
    - 复杂逻辑 继承GenericViewSet 或者 APIView