Django DRF当文件为空时更新它会给出错误 - 选择文件时它可以工作

Question

我在 DRF 中有一个视图 - 当我选择图像时它可以正常工作，但是当没有选择任何文件时它会引发错误：

The submitted data was not a file. Check the encoding type on the form.code invalid

我也尝试有条件地将图像字段，即（mainimage 和 image_with_self）放在dat1 {} 中，但这也不起作用。它不包括 dat1={} 中的键值对，而是将其放在字典对象之外作为 old[Inmemoryuploaded:filename]
下面是我的代码

class ArtworkViewSet(viewsets.ModelViewSet):
    
    queryset = Artwork.objects.all()
    # import pdb; pdb.set_trace();
    serializer_class = ArtworkSerializer
    permission_classes = [AllowAny]
    
    def partial_update(self, request, *args, **kwargs):
        # import pdb; pdb.set_trace()
        # kwargs['partial'] = True
        partial = kwargs.pop('partial', True)
        instance = self.get_object()
        dat1={}
        if request.data.get('own_work') == "false":
            name_of_creator=request.data.get('name_of_creator')
            name_of_owner=request.data.get('name_of_owner')
            age_of_work=request.data.get('age_of_work')
            house_no=request.data.get('house_no')
            building_name=request.data.get('building_name')
            
        else:

            user_id=request.user.id
            userprofile = UserProfile.objects.get(user=user_id)
            name_of_creator=userprofile.name
            name_of_owner=userprofile.name
            house_no=userprofile.house_no
            building_name=userprofile.building_name
            
      
        # if(request.data['image_with_self']!= ""):
       
        #     dat1['image_with_self']=request.data['image_with_self']

        # if(request.data['mainimage'] != ""):
        
        #     dat1['mainimage']=request.data['mainimage']
       
        

        


        dat1={  

            'title': request.data.get("title"),
           
           'description': request.data.get("description"),
           'artcontest': request.data.get("artcontest"),


            'mainimage':request.data['mainimage'],
            'image_with_self':request.data['image_with_self'],


           'category_id': request.data.get("category"),
           'size': request.data.get("size"),
           'weight': request.data.get("weight"),
           
           'material': request.data.get("material"),
           'sale_lend': request.data.get("sale_lend"),
           'own_work': request.data.get("own_work"),
           'name_of_creator': name_of_creator,
           'name_of_owner': name_of_owner,
           'house_no': house_no,
           'building_name': building_name,
             
            }
        # instance.save()

        import pdb; pdb.set_trace()
         
        serializer= self.get_serializer(instance, dat1, partial=partial)
       
        serializer.is_valid(raise_exception=True)
        serializer.save()
        return Response(serializer.data)
   

Answer 1

您是否在序列化类中将图像字段设为可选。如果不是，你应该这样做。

image = serializers.ImageField(required=False, max_length=None, allow_empty_file=True, use_url=True)

几天前我遇到了类似的错误。可能是it可以帮助你。