Django rest framework Django Rest框架过滤器：AttributeError:'；非类型'；对象没有属性'；更新'；_Django Rest Framework_Django Rest Framework Filters

Django rest framework Django Rest框架过滤器：AttributeError:'；非类型'；对象没有属性'；更新'；

django-rest-framework

Django rest framework Django Rest框架过滤器：AttributeError:'；非类型'；对象没有属性'；更新'；,django-rest-framework,django-rest-framework-filters,Django Rest Framework,Django Rest Framework Filters,我正在使用Django Rest框架过滤器（DRFF）。我有这两个模型定义： class Release(models.Model): application = models.ForeignKey(Application, on_delete=models.CASCADE, related_name='releases') price = models.FloatField(default=0.0) version_code = models.Inte

我正在使用Django Rest框架过滤器（DRFF）。我有这两个模型定义：

class Release(models.Model):
    application = models.ForeignKey(Application, on_delete=models.CASCADE,
        related_name='releases')
    price = models.FloatField(default=0.0)
    version_code = models.IntegerField()

class Application(models.Model):
    package_name = models.CharField(max_length=144, unique=True)
    description = models.TextField()

class ApplicationSerializer(serializers.ModelSerializer):
    releases = serializers.PrimaryKeyRelatedField(many=True, read_only=True)

    class Meta:
        model = Application
        fields = '__all__'

class ReleaseSerializer(serializers.ModelSerializer):
    class Meta:
        model = Release
        fields = '__all__'

class ApplicationViewSet(viewsets.ModelViewSet):
    queryset = Application.objects.all()
    serializer_class = ApplicationSerializer
    filter_class = ApplicationFilter

class ReleaseViewSet(viewsets.ModelViewSet):
    queryset = Release.objects.all()
    serializer_class = ReleaseSerializer
    filter_class = ReleaseFilter

class ReleaseFilter(filters.FilterSet):
    class Meta:
        model = Release
        fields = {
            'price': '__all__',
            'version_code': '__all__',
        }

class ApplicationFilter(filters.FilterSet):
    releases = filters.RelatedFilter(
        ReleaseFilter,
        queryset=Release.objects.all()
    )

    class Meta:
        model = Application
        fields = {
            'package_name': '__all__',
        }

正如您所见，一个应用程序有许多版本都具有related_name='Releases'。因此，我有两个序列化程序：

class Release(models.Model):
    application = models.ForeignKey(Application, on_delete=models.CASCADE,
        related_name='releases')
    price = models.FloatField(default=0.0)
    version_code = models.IntegerField()

class Application(models.Model):
    package_name = models.CharField(max_length=144, unique=True)
    description = models.TextField()

class ApplicationSerializer(serializers.ModelSerializer):
    releases = serializers.PrimaryKeyRelatedField(many=True, read_only=True)

    class Meta:
        model = Application
        fields = '__all__'

class ReleaseSerializer(serializers.ModelSerializer):
    class Meta:
        model = Release
        fields = '__all__'

class ApplicationViewSet(viewsets.ModelViewSet):
    queryset = Application.objects.all()
    serializer_class = ApplicationSerializer
    filter_class = ApplicationFilter

class ReleaseViewSet(viewsets.ModelViewSet):
    queryset = Release.objects.all()
    serializer_class = ReleaseSerializer
    filter_class = ReleaseFilter

class ReleaseFilter(filters.FilterSet):
    class Meta:
        model = Release
        fields = {
            'price': '__all__',
            'version_code': '__all__',
        }

class ApplicationFilter(filters.FilterSet):
    releases = filters.RelatedFilter(
        ReleaseFilter,
        queryset=Release.objects.all()
    )

    class Meta:
        model = Application
        fields = {
            'package_name': '__all__',
        }

这两个视图集：

class Release(models.Model): application = models.ForeignKey(Application, on_delete=models.CASCADE, related_name='releases') price = models.FloatField(default=0.0) version_code = models.IntegerField() class Application(models.Model): package_name = models.CharField(max_length=144, unique=True) description = models.TextField()

class ApplicationSerializer(serializers.ModelSerializer): releases = serializers.PrimaryKeyRelatedField(many=True, read_only=True) class Meta: model = Application fields = '__all__' class ReleaseSerializer(serializers.ModelSerializer): class Meta: model = Release fields = '__all__'

class ApplicationViewSet(viewsets.ModelViewSet): queryset = Application.objects.all() serializer_class = ApplicationSerializer filter_class = ApplicationFilter class ReleaseViewSet(viewsets.ModelViewSet): queryset = Release.objects.all() serializer_class = ReleaseSerializer filter_class = ReleaseFilter

class ReleaseFilter(filters.FilterSet): class Meta: model = Release fields = { 'price': '__all__', 'version_code': '__all__', } class ApplicationFilter(filters.FilterSet): releases = filters.RelatedFilter( ReleaseFilter, queryset=Release.objects.all() ) class Meta: model = Application fields = { 'package_name': '__all__', }
我有两个过滤器（使用DRFF）：

class Release(models.Model): application = models.ForeignKey(Application, on_delete=models.CASCADE, related_name='releases') price = models.FloatField(default=0.0) version_code = models.IntegerField() class Application(models.Model): package_name = models.CharField(max_length=144, unique=True) description = models.TextField()

class ApplicationSerializer(serializers.ModelSerializer): releases = serializers.PrimaryKeyRelatedField(many=True, read_only=True) class Meta: model = Application fields = '__all__' class ReleaseSerializer(serializers.ModelSerializer): class Meta: model = Release fields = '__all__'

class ApplicationViewSet(viewsets.ModelViewSet): queryset = Application.objects.all() serializer_class = ApplicationSerializer filter_class = ApplicationFilter class ReleaseViewSet(viewsets.ModelViewSet): queryset = Release.objects.all() serializer_class = ReleaseSerializer filter_class = ReleaseFilter

class ReleaseFilter(filters.FilterSet): class Meta: model = Release fields = { 'price': '__all__', 'version_code': '__all__', } class ApplicationFilter(filters.FilterSet): releases = filters.RelatedFilter( ReleaseFilter, queryset=Release.objects.all() ) class Meta: model = Application fields = { 'package_name': '__all__', }
我的RESTAPI正在本地主机上运行：9000/API/v1/ 但是，当我尝试查看应用程序视图时（在浏览器中：“GET/api/v1/Application/”），我得到了此错误：“AttributeError:'NoneType'对象没有属性'update'”
这是此错误的回溯：

Internal Server Error: /api/v1/application/ Traceback (most recent call last): File "/home/jfsanchez/Projects/kiosko/lib/python3.5/site-packages/django/core/handlers/exception.py", line 41, in inner response = get_response(request) File "/home/jfsanchez/Projects/kiosko/lib/python3.5/site-packages/django/core/handlers/base.py", line 217, in _get_response response = self.process_exception_by_middleware(e, request) File "/home/jfsanchez/Projects/kiosko/lib/python3.5/site-packages/django/core/handlers/base.py", line 215, in _get_response response = response.render() File "/home/jfsanchez/Projects/kiosko/lib/python3.5/site-packages/django/template/response.py", line 107, in render self.content = self.rendered_content File "/home/jfsanchez/Projects/kiosko/lib/python3.5/site-packages/rest_framework/response.py", line 72, in rendered_content ret = renderer.render(self.data, accepted_media_type, context) File "/home/jfsanchez/Projects/kiosko/lib/python3.5/site-packages/rest_framework/renderers.py", line 706, in render context = self.get_context(data, accepted_media_type, renderer_context) File "/home/jfsanchez/Projects/kiosko/lib/python3.5/site-packages/rest_framework/renderers.py", line 683, in get_context 'filter_form': self.get_filter_form(data, view, request), File "/home/jfsanchez/Projects/kiosko/lib/python3.5/site-packages/rest_framework/renderers.py", line 618, in get_filter_form html = backend().to_html(request, queryset, view) File "/home/jfsanchez/Projects/kiosko/lib/python3.5/site-packages/django_filters/rest_framework/backends.py", line 61, in to_html filter_instance = filter_class(request.query_params, queryset=queryset, request=request) File "/home/jfsanchez/Projects/kiosko/lib/python3.5/site-packages/django_filters/filterset.py", line 186, in __init__ self.filters = copy.deepcopy(self.base_filters) File "/usr/lib/python3.5/copy.py", line 182, in deepcopy y = _reconstruct(x, rv, 1, memo) File "/usr/lib/python3.5/copy.py", line 320, in _reconstruct value = deepcopy(value, memo) File "/usr/lib/python3.5/copy.py", line 182, in deepcopy y = _reconstruct(x, rv, 1, memo) File "/usr/lib/python3.5/copy.py", line 297, in _reconstruct state = deepcopy(state, memo) File "/usr/lib/python3.5/copy.py", line 155, in deepcopy y = copier(x, memo) File "/usr/lib/python3.5/copy.py", line 243, in _deepcopy_dict y[deepcopy(key, memo)] = deepcopy(value, memo) File "/usr/lib/python3.5/copy.py", line 182, in deepcopy y = _reconstruct(x, rv, 1, memo) File "/usr/lib/python3.5/copy.py", line 297, in _reconstruct state = deepcopy(state, memo) File "/usr/lib/python3.5/copy.py", line 155, in deepcopy y = copier(x, memo) File "/usr/lib/python3.5/copy.py", line 243, in _deepcopy_dict y[deepcopy(key, memo)] = deepcopy(value, memo) File "/usr/lib/python3.5/copy.py", line 182, in deepcopy y = _reconstruct(x, rv, 1, memo) File "/usr/lib/python3.5/copy.py", line 297, in _reconstruct state = deepcopy(state, memo) File "/usr/lib/python3.5/copy.py", line 155, in deepcopy y = copier(x, memo) File "/usr/lib/python3.5/copy.py", line 243, in _deepcopy_dict y[deepcopy(key, memo)] = deepcopy(value, memo) File "/usr/lib/python3.5/copy.py", line 182, in deepcopy y = _reconstruct(x, rv, 1, memo) File "/usr/lib/python3.5/copy.py", line 297, in _reconstruct state = deepcopy(state, memo) File "/usr/lib/python3.5/copy.py", line 155, in deepcopy y = copier(x, memo) File "/usr/lib/python3.5/copy.py", line 243, in _deepcopy_dict y[deepcopy(key, memo)] = deepcopy(value, memo) File "/usr/lib/python3.5/copy.py", line 182, in deepcopy y = _reconstruct(x, rv, 1, memo) File "/usr/lib/python3.5/copy.py", line 297, in _reconstruct state = deepcopy(state, memo) File "/usr/lib/python3.5/copy.py", line 155, in deepcopy y = copier(x, memo) File "/usr/lib/python3.5/copy.py", line 243, in _deepcopy_dict y[deepcopy(key, memo)] = deepcopy(value, memo) File "/usr/lib/python3.5/copy.py", line 182, in deepcopy y = _reconstruct(x, rv, 1, memo) File "/usr/lib/python3.5/copy.py", line 297, in _reconstruct state = deepcopy(state, memo) File "/usr/lib/python3.5/copy.py", line 155, in deepcopy y = copier(x, memo) File "/usr/lib/python3.5/copy.py", line 243, in _deepcopy_dict y[deepcopy(key, memo)] = deepcopy(value, memo) File "/usr/lib/python3.5/copy.py", line 182, in deepcopy y = _reconstruct(x, rv, 1, memo) File "/usr/lib/python3.5/copy.py", line 297, in _reconstruct state = deepcopy(state, memo) File "/usr/lib/python3.5/copy.py", line 155, in deepcopy y = copier(x, memo) File "/usr/lib/python3.5/copy.py", line 243, in _deepcopy_dict y[deepcopy(key, memo)] = deepcopy(value, memo) File "/usr/lib/python3.5/copy.py", line 182, in deepcopy y = _reconstruct(x, rv, 1, memo) File "/usr/lib/python3.5/copy.py", line 306, in _reconstruct y.__dict__.update(state) AttributeError: 'NoneType' object has no attribute 'update' [09/Nov/2017 14:49:29] "GET /api/v1/application/ HTTP/1.1" 500 664601
这是我（主要）的VirtualNV堆栈：

Django==1.11.4 django-filters==0.2.1 djangorestframework==3.6.4 djangorestframework-filters==0.10.2
有人能帮我修一下吗？这里有什么问题？我做错了什么？
谢谢
你有什么解决办法吗？我在render json_api_meta.update（self.extract_root_meta（serializer，serializer_data））AttributeError中的第569行得到了这个结果：“NoneType”对象没有属性“update”，您得到了任何解决方案吗？我在render json_api_meta.update（self.extract_root_meta（serializer，serializer_data））AttributeError中的第569行得到了这个结果：“NoneType”对象没有属性“update”