javascript - 创建导致错误的自引用模型记录

Question

我将自引用模型定义为:

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

我不确定如何定义逆属性以使事情正常工作。这是我所拥有的 jsbin:http://jsbin.com/oKezUkaz/1/

如果我们添加一个组(按“添加组”按钮)，我们会在控制台中收到错误消息:

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

Answer 1

在这种情况下，您需要在两者上定义inverse，否则它会陷入沿其中一条路径向下的循环中。 Ember Data 的文档缺乏这方面的内容，但应该在 ED 达到可靠的 1.0 版本后进行处理。

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