如何（如果可能）将自定义字段添加到 Django / REST 中的分页响应中？

Question

假设我有如下视图：

class FooView(ListAPIView):
    serializer_class = FooSerializer
    pagination_class = FooPagination

它返回一个典型的分页响应，例如：

{
     "count":2,
     "next":null,
     "previous":null,
     "results":[
      {
          "id":1,"name":"Josh"
       },
      {
          "id":2,"name":"Vicky"
      }]
}

如何（如果可能）将自定义字段添加到此响应中以使结果如下？

{
    "count":2,
    "next":null,
    "previous":null,
    "custom":"some value",
    "results":[
    {
         "id":1,"name":"Josh"
     },
     {
         "id":2,"name":"Vicky"
      }]
}

假设“某个值”以适当的方法计算并存储，例如：

def get_queryset(self):
    self.custom = get_custom_value(self)
    # etc...

Answer 1

另一种可能的解决方案是将自定义字段添加到您的响应中，不需要覆盖 Pagination 类

def list(self, request, *args, **kwargs):
        response = super(YourClass, self).list(request, args, kwargs)
        # Add data to response.data Example for your object:
        response.data['custom_fields'] = 10 # Or wherever you get this values from
        return response