创建引用错误的自我引用模型的记录 [英] creating records of self referring model causing error

问题描述

  App.Answer = DS.Model.extend（{
名称：DS.attr（'string'），
 parentAnswer：DS.belongsTo（'answer'），
 childAnswers：DS.hasMany（'answer'）
}）; 
  

我不知道如何定义逆属性来使事情工作。这是我拥有的jsbin： http://jsbin.com/oKezUkaz/1/

如果我们添加一个组（按添加组按钮），我们在控制台中收到错误信息：

 断言失败：您在App.Answer上定义了childAnswers关系，但在App.Answer中找到了App.Answer类型的多个可能的反向关系。查看http://emberjs.com/guides/models/defining-models/#toc_explicit-inverses如何明确指定反转
  

解决方案

在这种情况下，您需要在两者中定义 inverse ，否则会陷入循环中路径之一。 Ember Data的文档缺乏这一点，但应该在ED达到稳定的1.0之后进行处理。

  App.Answer = DS .Model.extend（{
 name：DS.attr（'string'），
 parentAnswer：DS.belongsTo（'answer'，{inverse：'childAnswers'}），
 childAnswers： DS.hasMany（'answer'，{inverse：'parentAnswer'}）
}）; 
  

http://jsbin.com/oKezUkaz/5/edit

I have self referring model defined as :

        App.Answer = DS.Model.extend({
            name: DS.attr('string'),
            parentAnswer: DS.belongsTo('answer'),
            childAnswers: DS.hasMany('answer')
        });

I am not sure how to define the inverse property to get things working. Here is a jsbin of what I have : http://jsbin.com/oKezUkaz/1/

If we add a group(pressing "Add group" button) we get error in the console saying:

Assertion failed: You defined the 'childAnswers' relationship on App.Answer, but multiple possible inverse relationships of type App.Answer were found on App.Answer. Look at http://emberjs.com/guides/models/defining-models/#toc_explicit-inverses for how to explicitly specify inverses

解决方案

In this case you need to define inverse on both, or it gets stuck in a loop going down one of the path's. Ember Data's documentation is lacking on this, but should be worked on after ED gets to a solid 1.0.

App.Answer = DS.Model.extend({
  name: DS.attr('string'),
  parentAnswer: DS.belongsTo('answer', {inverse: 'childAnswers'}),
  childAnswers: DS.hasMany('answer', {inverse: 'parentAnswer'})
});

http://jsbin.com/oKezUkaz/5/edit

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