1.编辑 try_reqwest.html

增加一个 deleteData 方法：

var deleteData = function() {
        var id = 1; // 书本的id
        reqwest({
            url: 'api/revise_book/' + id,
            type: "json",
            method: "delete",  // delete 方法用于删除数据
            success: function(resp) {}
        })
    };

2. 编辑 api.py

修改 revise_book 方法，增加删除数据的功能：

# put 方法用于修改数据，delete 方法用于删除数据
@api_view(['PUT', 'DELETE'])
# id参数来自url， 用于找到要改变的那条数据
def revise_book(request, id):
    revise_book = Book.objects.get(id=id)
    if request.method == 'PUT':
        serializer = BookSerializer(revise_book, 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)

    # 删除数据
    elif request.method == 'DELETE':
        revise_book.delete()
        return Response({'msg': 'A-OK'}, status=status.HTTP_201_CREATED)

3.测试

控制台输入：deleteData ，就能删除 id=1 的书了。