Reactjs Django-3.1/DRF/React:无法保存嵌套图像（通过GenericRelation链接）

我正在构建一个

Django+DRF/React

app（简单博客app），我在保存嵌套图像时遇到了困难

模型结构

• 型号：
  • 职位
• 儿童：
  • 详细信息：ContentType模型（DRF:保存成功）
  • 图像：ContentType模型（DRF:保存未成功）

过程

• 从

• 通过

  FormData

• 捕获

  request.data

  并对其进行处理

  class PostFormView(generics.RetrieveUpdateDestroyAPIView):
      queryset = Post._objects.is_active()
      serializer_class = PostModelSerializer
      permission_classes = (IsOwnerOr401,)
      parser_classes = (parsers.MultiPartParser,parsers.JSONParser,
                  parsers.FormParser, parsers.FileUploadParser)
      lookup_field = 'slug'
      lookup_url_kwarg = 'slug'
  
      def get_queryset(self):
           return super().get_queryset().annotate(**sharedAnnotations(request=self.request))
  
      def update(self, request, *args, **kwargs):
  
           data = request.data
           _images = data.getlist('images')
           images = []
           for _ in _images:
               if isinstance(_, dict):
                   images.append(images)
                   continue
               images.append({'image': _, 'object_id': self.get_object().pk, 'content_type': self.get_object().get_content_type().pk})
  
            data['images'] = images
  
            print(data)
  
            partial = kwargs.pop('partial', False)
            instance = self.get_object()
            serializer = self.get_serializer(instance, data=data,  partial=partial)
            serializer.is_valid(raise_exception=True)
            self.perform_update(serializer)
  
            if getattr(instance, '_prefetched_objects_cache', None):
                instance._prefetched_objects_cache = {}
  
            return Response(serializer.data)
  

• 保存图像（失败）：

• PostFormView.update（self、request、*args、**kwargs）中的
  print（data）
  语句（操作后）返回以下内容：
  
  <QueryDict: {'id': ['8'], ..., 'images': [[{'image': <InMemoryUploadedFile: bmw_3.jpeg (image/jpeg)>, 'object_id': 8, 'content_type': 20}, {'image': <InMemoryUploadedFile: bmw_2.jpeg (image/jpeg)>, 'object_id': 8, 'content_type': 20}, {'image': <InMemoryUploadedFile: bmw_1.jpeg (image/jpeg)>, 'object_id': 8, 'content_type': 20}]]}>
  
  

我已经面对这个问题三天了，我无法理解根本原因

---

谢谢你的帮助。

我一直在网上找，但是找不到任何人，所以我不得不走这条路

我已经从

PostFormView.update（…）

中删除了处理部分，并直接在

ModelSerializer

的

create

和

update

方法中访问了

图像。稍后，我将了解如何处理删除这些图像

代码如下：

class PostModelSerializer(WritableNestedModelSerializer):

    is_active = serializers.BooleanField(default=True)
    path = serializers.HyperlinkedIdentityField(
        view_name="api:post-detail", lookup_field='slug')

    images = MediaModelSerializer(read_only=True, many=True)
    details = DetailModelSerializer(required=False, many=True)

    # annotated fields
    is_author = serializers.BooleanField(read_only=True, default=False)

    class Meta:
        model = Post
        fields = '__all__'
        read_only_fields = ['is_locked', 'slug', 'user', 'is_author']

    def create(self, validated_data):
        instance = super().create(validated_data)

        request = self.context.get('request', None)
        if request:
            try:
                images = request.data.getlist('images')
                for image in images:
                    self.instance.images.create(image=image)
            except Exception as e:
                pass

        return instance

    def update(self, instance, validated_data):
        instance = super().update(instance, validated_data)
        
        request = self.context.get('request', None)
        if request:
            try:
                images = request.data.getlist('images')
                for image in images:
                    self.instance.images.create(image=image)
            except Exception as e:
                pass

        return instance

如果有人曾经遇到过这个问题并设法解决了它，请在下面发布您的答案

谢谢大家!
 我在互联网上到处找，但找不到任何人，所以我不得不走这条路

我已经从
PostFormView.update（…）
中删除了处理部分，并直接在
ModelSerializer
的
create
和
update
方法中访问了
图像。稍后，我将了解如何处理删除这些图像

代码如下：

class PostModelSerializer(WritableNestedModelSerializer):

    is_active = serializers.BooleanField(default=True)
    path = serializers.HyperlinkedIdentityField(
        view_name="api:post-detail", lookup_field='slug')

    images = MediaModelSerializer(read_only=True, many=True)
    details = DetailModelSerializer(required=False, many=True)

    # annotated fields
    is_author = serializers.BooleanField(read_only=True, default=False)

    class Meta:
        model = Post
        fields = '__all__'
        read_only_fields = ['is_locked', 'slug', 'user', 'is_author']

    def create(self, validated_data):
        instance = super().create(validated_data)

        request = self.context.get('request', None)
        if request:
            try:
                images = request.data.getlist('images')
                for image in images:
                    self.instance.images.create(image=image)
            except Exception as e:
                pass

        return instance

    def update(self, instance, validated_data):
        instance = super().update(instance, validated_data)
        
        request = self.context.get('request', None)
        if request:
            try:
                images = request.data.getlist('images')
                for image in images:
                    self.instance.images.create(image=image)
            except Exception as e:
                pass

        return instance

如果有人曾经遇到过这个问题并设法解决了它，请在下面发布您的答案

谢谢大家!

class PostModelSerializer(WritableNestedModelSerializer):

    is_active = serializers.BooleanField(default=True)
    path = serializers.HyperlinkedIdentityField(
        view_name="api:post-detail", lookup_field='slug')

    images = MediaModelSerializer(read_only=True, many=True)
    details = DetailModelSerializer(required=False, many=True)

    # annotated fields
    is_author = serializers.BooleanField(read_only=True, default=False)

    class Meta:
        model = Post
        fields = '__all__'
        read_only_fields = ['is_locked', 'slug', 'user', 'is_author']

    def create(self, validated_data):
        instance = super().create(validated_data)

        request = self.context.get('request', None)
        if request:
            try:
                images = request.data.getlist('images')
                for image in images:
                    self.instance.images.create(image=image)
            except Exception as e:
                pass

        return instance

    def update(self, instance, validated_data):
        instance = super().update(instance, validated_data)
        
        request = self.context.get('request', None)
        if request:
            try:
                images = request.data.getlist('images')
                for image in images:
                    self.instance.images.create(image=image)
            except Exception as e:
                pass

        return instance