类型错误：“FieldFile”对象不是可调用(TypeError: 'FieldFile&

我得到的TypeError: 'FieldFile' object is not callable试图获得上传文件的URL时：

class FetchedDataSerializer(serializers.ModelSerializer):
   file_fields = serializers.SerializerMethodField()

   class Meta:
      model = FetchedData
      fields = ('model_id', 'config_id', 'config_name', 'file_fields')

   def get_file_fields(self, obj):
      queryset = obj.config_id.config_file() ### 
      return ShoppingListSerializer(queryset, many=True).data

该模型包括以下字段：

class ShoppingList(models.Model):
   id = models.CharField(max_length=40, primary_key=True)
   name = models.CharField(max_length=40)
   session_id = models.CharField(max_length=40)
   config_file = models.FileField(upload_to=upload_config_file)

   def __str__(self):
       return self.id

我应该用做queryset ，最终显示上传的文件URL？

Answer 1:

您可以编辑get_file_fields这样的吗？

class FetchedDataSerializer(serializers.ModelSerializer):
   file_fields = serializers.SerializerMethodField()

   class Meta:
      model = FetchedData
      fields = ('model_id', 'config_id', 'config_name', 'file_fields')

   def get_file_fields(self, obj):
      queryset = ShoppingList.objects.filter(config_file = obj)
      return [ShoppingListSerializer(cf).data for cf in queryset]

Answer 2:

由于写的，你想在这一行执行现场obj.config_id.config_file() 如果你想序列化，你可以简单地序列化一个模型对象，你并不需要一个查询集。

class FetchedDataSerializer(serializers.ModelSerializer):
   file_fields = serializers.SerializerMethodField()

   class Meta:
      model = FetchedData
      fields = ('model_id', 'config_id', 'config_name', 'file_fields')

   def get_file_fields(self, obj):
      return ShoppingListSerializer(obj).data

文章来源: TypeError: 'FieldFile' object is not callable