Django序列化到JSON错误：'MetaDict'对象没有属性'concrete_model' [英] Django serialization to JSON error: 'MetaDict' object has no attribute 'concrete_model'

问题描述

我正在使用一个使用Django和MongoDB（作为模型）的应用程序。我正在尝试使用从表单获得的数据来初始化（手动）模型对象（以便将其进一步发送到另一个服务器）。模型如下所示：

  class MyModel（DynamicDocument）：
 study_name = StringField（default =first study ）
 individual_name = StringField（default =individual）
 file_list = ListField（StringField）＃这是某些文件的路径列表
  

以我所做的以下形式：

  pilot_object = MyModel （）
 pilot_object.individual_name = self.data ['individual_name'] 
 pilot_object.study_name = self.data ['study_name'] 
 pilot_object.file_list = files_list #file路径（字符串）
  

其中self.data是从表单接收的数据。
现在我想按照文档中的描述序列化JSON对象（pilot_object）：

  data_serialized = serializers。序列化（'json'，[pilot_object，]）
  

但是我收到这个错误：

'MetaDict'对象没有属性'concrete_model'

，序列化失败。 p>

任何人都可以帮忙？

解决方案

如果你有meta {继承：True }然后删除它。它正在寻找具体的类，我认为你没有设计，所以不需要继承是无论如何。它为我工作。

I am working on an application that uses Django and MongoDB (as a model). I am trying to initialize (by hand) a model object (in order to send it further to another server), using the data got from a form. The model looks like this:

class MyModel(DynamicDocument):
    study_name = StringField(default="first study")
    individual_name = StringField(default="individual")
    file_list = ListField(StringField)   # this is a list of paths to some files

In the form I am doing the following:

pilot_object = MyModel()
pilot_object.individual_name = self.data['individual_name']
pilot_object.study_name = self.data['study_name']
pilot_object.file_list = files_list #file paths (strings)

where self.data is the data received from the form. Now I want to serialize to JSON this object (pilot_object) as described in the documentation:

data_serialized = serializers.serialize('json', [pilot_object, ])

but I get this error:

'MetaDict' object has no attribute 'concrete_model'

and the serialization fails.

Can anyone help?

解决方案

If you have meta{Inheritance:True} then remove it. It is looking for concrete class which i think you havent designed so no need for inheritance to be True anyhow. It worked for me.

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