Question

当提示PUT（更新）出错时

无法调用.is_valid（），因为在实例化序列化程序实例时没有传递data = keyword参数。我的观点：

    def get_serializer(self, *args, **kwargs):
            queryset = Producer.objects.get(pk=self.kwargs['pk'])
            if self.request.user.is_authenticated:
                return ProducerSerializer(queryset,
                                          fields=('short_info',))

            if self.request.method == 'PUT' or self.request.method == 'PATCH':
                return ProducerUpdateSerializer

            else:
                return ProducerSerializer(queryset,
                                          fields=('website', 'phone', 'email', 'contacts', 'short_info'))

        def get_queryset(self):
            return Producer.objects.filter(pk=self.kwargs['pk'])

我的序列化程序

 class DynamicFieldsModelSerializer(serializers.ModelSerializer):

    def __init__(self, *args, **kwargs):
        # Don't pass the 'fields' arg up to the superclass
        fields = kwargs.pop('fields', None)

        # Instantiate the superclass normally
        super(DynamicFieldsModelSerializer, self).__init__(*args, **kwargs)

        if fields is not None:
            for i in fields:
                print self.fields.pop(i)


class ProducerSerializer(DynamicFieldsModelSerializer):
    tags = TagListSerializerField()
    categories = serializers.StringRelatedField(many=True)
    contacts = ProducerContactSerializer(many=True)
    country = CountryField(country_dict=True)
    business_type = ChoicesSerializerField()

    class Meta:
        model = Producer
        fields = ('id', 'business_type', 'logo', 'name', 'slug', 'country', 'city',
                  'street_address', 'zip', 'short_info', 'info', 'website',
                  'categories', 'tags', 'contacts', 'email', 'phone')


class ProducerUpdateSerializer(serializers.ModelSerializer):
    tags = TagListSerializerField()
    categories = serializers.StringRelatedField(many=True)

    class Meta:
        model = Producer
        fields = ('id', 'business_type', 'logo', 'name', 'slug', 'country', 'city',
                  'street_address', 'zip', 'short_info', 'info', 'website', 'categories', 'tags')

当提示PUT（更新）出错时

无法调用.is_valid（），因为在实例化序列化程序实例时没有传递data = keyword参数。

Answer 1

首先，我怀疑你的get_serializer对PUT是否正确。它应该在您返回类时返回一个实例。

至于您的问题，错误消息非常清楚。在实例化它时，您没有将data=request.data传递给序列化程序。文档包含an example如何执行此操作。

如何用方法PUT django-rest-framework更新

1 个答案: