Class-based Views | DRF

前言：重用共同的功能，减少代码量。

方式：

　　1.APIView

class ProcessList(APIView):
    """
    列出所有process，或者创建一个新的process
    """

    def get(self, request, format=None):
        process = Process.objects.all()
        serializer = ProcessSerializer(process, many=True)
        return Response(serializer.data)

    def post(self, request, format=None):
        serializer = ProcessSerializer(data=request.data)
        if serializer.is_valid():
            serializer.save()
            return Response(serializer.data, status=status.HTTP_201_CREATED)
        return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)


class ProcessDetail(APIView):
    """
    查找、更新或删除process
    """
    def get_object(self, pk):
        try:
            return Process.objects.get(pk=pk)
        except Process.DoesNotExist:
            raise Http404

    def get(self, request, pk, format=None):
        process = self.get_object(pk)
        serializer = ProcessSerializer(process)
        return Response(serializer.data)

    def delete(self, request, pk, format=None):
        process = self.get_object(pk)
        process.delete()
        return Response(status=status.HTTP_204_NO_CONTENT)

　　2.mixins.ListModelMixin等 + GenericAPIView

class ProcessList(mixins.ListModelMixin, mixins.CreateModelMixin, generics.GenericAPIView):
    """
        ListModelMixin提供list()方法
        CreateModelMixin提供create()方法
        GenericAPIView
    """
    queryset = Process.objects.all()
    serializer_class = ProcessSerializer

    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 ProcessDetail(mixins.RetrieveModelMixin, mixins.UpdateModelMixin, mixins.DestroyModelMixin,
                    generics.GenericAPIView):
    """
        RetrieveModelMixin提供了retrieve()方法
        UpdateModelMixin提供了update()方法
        DestroyModelMixin提供了delete()方法
        GenericAPIView
    """
    queryset = Process.objects.all()
    serializer_class = ProcessSerializer

    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)

　　3.generics.ListCreateAPIView等

class ProcessList(generics.ListCreateAPIView):
    queryset = Process.objects.all()
    serializer_class = ProcessSerializer


class ProcessDetail(generics.RetrieveUpdateDestroyAPIView):
    queryset = Process.objects.all()
    serializer_class = ProcessSerializer

需要导入模块：

from .serializers import ProcessSerializer
from rest_framework.response import Response
from rest_framework import status
from rest_framework.decorators import api_view
from rest_framework.views import APIView

from rest_framework import mixins
from rest_framework import generics