Django DRF在更新时文件为空时显示错误-选择文件后即可工作

问题描述

我在DRF中有一个视图-当我选择图像时，它可以正常工作，但是当没有选择文件时，它将引发错误：

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

我也尝试过有条件地将图像字段，即（mainimage和image_with_self）放入dat1 {}中，但效果不佳。它在dat1={}中不包含键值对，而是以old[Inmemoryuploaded:filename]的形式放在字典对象之外
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)
   

解决方法

您是否在序列化类中将image字段设为可选。如果不是，那么应该。

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it可以为您提供帮助。