django - 如何将 order_by 添加到 django rest 框架中的自定义序列化程序字段

Question

序列化器:

class RequestSerializer(serializers.ModelSerializer):

    travel_date = serializers.SerializerMethodField(method_name='get_traveldate')
    guests = serializers.SerializerMethodField(method_name='get_num_of_guests')
    cost = serializers.SerializerMethodField(method_name='get_invoice_cost')
    status = serializers.SerializerMethodField(method_name='get_request_status')

    class Meta:
        model = Request
        fields = (guests, cost,)


class BookingView(generics.ListApiView):

     serializer_class = RequestSerializer
     model = serializer_class.Meta.model
     paginate_by = 15
     filter_fields = ('costs', 'guests')

     def get_queryset(self):
        req_dict = self.request.query_params
        client = int(req_dict.get('client'))
        start_date = date(int(req_dict.get('from_year')), int(req_dict.get('from_month')), 1)
        end_date = get_end_date(int(req_dict.get('to_year')),  int(req_dict.get('to_month')))
        requests = Request.objects.filter(guests__company__id=client, check_in__gte=start_date,
                                          check_out__lte=end_date)

        return requests

Answer 1

您可以将 MethodField 的逻辑移至 Request 类的ma​​nager。

一旦您在管理器中拥有它，它们将可用于每个对象(序列化器、 View ...)并且您将能够使用它进行排序。

This is link will be helpful to it