案例-使用APIView改写RestAPI

# views.py
from rest_framework.views import APIView
from rest_framework import status
from django.http import Http404

from booktest.serializers import BookInfoSerializer

# /books/
class BookListView(APIView):
    """
    获取所有图书、增加图书
    """
    def get(self, request):
        """
        获取所有的图书数据
        """
        queryset = BookInfo.objects.all()

        # 序列化所有图书数据
        serializer = BookInfoSerializer(queryset, many=True)

        return Response(serializer.data)

    def post(self, request):
        """
        新增一个图书数据
        """
        # 反序列化-数据校验
        serializer = BookInfoSerializer(data=request.data)
        serializer.is_valid(raise_exception=True)

        # 反序列化-数据保存(save内部会调用序列化器类的create方法)
        serializer.save()

        return Response(serializer.data, status=status.HTTP_201_CREATED)

# /books/(?P<pk>\d+)/
class BookDetailView(APIView):
    """
    获取、修改、删除指定图书
    """
    def get(self, request, pk):
        """
        获取指定图书
        """
        try:
            book = BookInfo.objects.get(pk=pk)
        except BookInfo.DoesNotExist:
            raise Http404

        # 将图书数据进行序列化
        serializer = BookInfoSerializer(book)

        return Response(serializer.data)

    def put(self, request, pk):
        """
        修改指定图书
        """
        try:
            book = BookInfo.objects.get(pk=pk)
        except BookInfo.DoesNotExist:
            raise Http404

        # 反序列化-数据校验
        serializer = BookInfoSerializer(book, data=request.data)
        serializer.is_valid(raise_exception=True)

        # 反序列化-数据保存(save内部会调用序列化器类的update方法)
        serializer.save()

        return Response(serializer.data)

    def delete(self, request, pk):
        """
        删除指定图书：
        """
        try:
            book = BookInfo.objects.get(pk=pk)
        except BookInfo.DoesNotExist:
            raise Http404

        book.delete()

        return Response(status=status.HTTP_204_NO_CONTENT)

Django课程讲义 APIView