TypeError：“ FieldFile”对象不可调用 [英] TypeError: 'FieldFile' object is not callable

问题描述

我遇到 TypeError： FieldFile对象不可调用，当试图获取上传文件的URL时：

I'm getting the TypeError: 'FieldFile' object is not callable when trying to get URL of uploaded file:

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

The模型由以下字段组成：

The model consists of the following fields:

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

queryset 应该怎么做才能最终显示上传的文件URL ？

What should be done with the queryset to eventually display uploaded file URL?

推荐答案

您可以像这样编辑 get_file_fields 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]

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