Question

我正在尝试使用Django 1.11.2在restful API中创建注释。目前我正在使用“CodingEntrepreneurs”中的“使用Django Rest Framework的Blog API”教程。我不知道问题是什么。

这是序列化代码：

def create_comment_serializer(model_type='post', slug=None, parent_id=None, user=None):
    class CommentCreateSerializer(ModelSerializer):
        class Meta:
            model = Comment
            fields = [
                'id',
                'content',
                'timestamp',
            ]
        def __init__(self, *args, **kwargs):
            self.model_type = model_type
            self.slug = slug
            self.parent_obj = None
            if parent_id:
                parent_qs = Comment.objects.filter(id=parent_id)
                if parent_qs.exists() and parent_qs.count() ==1:
                    self.parent_obj = parent_qs.first()
            return super(CommentCreateSerializer, self).__init__(*args, **kwargs)

        def validate(self, data):
            model_type = self.model_type
            model_qs = ContentType.objects.filter(model=model_type)
            if not model_qs.exists() or model_qs.count() != 1:
                raise ValidationError("This is not a valid content type")
            SomeModel = model_qs.first().model_class()
            obj_qs = SomeModel.objects.filter(slug=self.slug)
            if not obj_qs.exists() or obj_qs.count() != 1:
                raise ValidationError("This is not a slug for this content type")
            return data

        def create(self, validated_data):
            content = validated_data.get("content")
            if user:
                main_user = user
            else:
                main_user = User.objects.all().first()
            model_type = self.model_type
            slug = self.slug
            parent_obj = self.parent_obj
            comment = Comment.objects.create_by_model_type(
                model_type, slug, content, main_user,
                parent_obj=parent_obj
            )
            return comment

    return CommentCreateSerializer

这是视图代码：

class CommentCreateAPIView(CreateAPIView):
    queryset = Comment.objects.all()
    #serializer_class = PostCreateUpdateSerializer
    permission_classes = [IsAuthenticated]

    def get_serializer_class(self):
        model_type = self.request.GET.get("type")
        slug = self.request.GET.get("slug")
        parent_id = self.request.GET.get("parent_id", None)
        return create_comment_serializer(
                model_type=model_type,
                slug=slug,
                parent_id=parent_id,
                user=self.request.user
                )

Answer 1

不知何故，Comment.objects.create_by_model_type()未创建任何对象，create()方法未找到任何要返回的内容。

Django：`create（）`没有返回对象实例

1 个答案: