使用Django Rest框架序列化查询集时的“ ListSerializer” [英] 'ListSerializer' when serializing a queryset using Django Rest Framework

问题描述

我有一个稍微复杂的APIView，这使我无法使用通用 ListAPIView 返回查询集。但是，即使我设置了 many = True ，我似乎也无法使用ModelSerializer来简单地序列化一个简单的Django查询集。

I have a slightly complicated APIView which makes that I can't use a generic ListAPIView to return a queryset. But I can't seem to simply serialize a simple Django queryset using a ModelSerializer, even when I set many=True.

这不起作用：

serializers.py：

class SomeModelSerializer(serializers.ModelSerializer):

    class Meta:
        model = SomeModel
        fields = ['some_field']

views.py：

from rest_framework.response import Response

class SomeAPIView(APIView):
    serializer_class = SomeInputSerializer

    def post(self, request, format=None):
        serializer = self.serializer_class(data=request.data)
        if serializer.is_valid():
            # first some business logic, then return results
            results = SomeModel.objects.all()
            output_serializer = SomeModelSerializer(results, many=True)
            return Response(output_serializer.data)

我一直得到的是：'ListSerializer'对象是不可迭代的。

我在做什么错了？

错误：

/projectfolder/venv/lib/python2.7/site-packages/django/template/defaulttags.py in render
            try:
                values = self.sequence.resolve(context, True)
            except VariableDoesNotExist:
                values = []
            if values is None:
                values = []
            if not hasattr(values, '__len__'):
                values = list(values) ...
            len_values = len(values)
            if len_values < 1:
                return self.nodelist_empty.render(context)
            nodelist = []
            if self.is_reversed:
                values = reversed(values)

值=列表（值）似乎是导致错误的原因

values = list(values) seems to be responsible for the error

推荐答案

以下使用as_view（）网址为我工作：

Below works for me using an as_view() url:

 class ListCreateMemberViewSet(generics.ListCreateAPIView):
        """
        API endpoint that allows multiple members to be created.
        """
        queryset = Member.objects.none()
        serializer_class = MemberSerializer

    def get_queryset(self):
         queryset = Member.objects.all()
         return queryset

    def create(self, request, *args, **kwargs):
        serializer = self.get_serializer(data=request.data, many=isinstance(request.data, list))
        serializer.is_valid(raise_exception=True)
        self.perform_create(serializer)
        results = Member.objects.all()
        output_serializer = MemberSerializer(results, many=True)
        data = output_serializer.data[:]
        return Response(data)

这篇关于使用Django Rest框架序列化查询集时的“ ListSerializer”的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！