观察员在Ember不工作？ [英] Observer not working in Ember?

问题描述

我无法让观察者在Ember.js中做任何事情。基本上，我有一个Ember.Select下拉菜单，并希望绑定一些更多的动作到选择下拉列表中的值的事件。例如：

  App.selectedPersonController = Ember.Object.create（{
 person：null，
 personDidChange：function（）{
 //当人员更改
 console.log（PERSON CHANGED）
} .observes（'person'）
}时， ; 
  

即使'person'属性正在更新，没有任何事情发生。有什么建议么？

解决方案

这是因为，在版本pre4之前，您无法在 em。*。create（）函数。您必须首先使用 .extend（）函数，并设置所有属性和可观察值，然后创建该对象。

举例来说，请查看正在使用的 jsfiddle 扩展功能。然后尝试使用创建将其删除，您将看到该应用不再有效。

I can't get an observer to actually do anything in Ember.js. Basically, I have a Ember.Select dropdown menu, and want to bind some more action to the event of selecting the value in the dropdown. For example:

App.selectedPersonController = Ember.Object.create({
  person: null,
  personDidChange: function() {
    // do something here when the person changes
    console.log("PERSON CHANGED")
  }.observes('person')
});

And nothing is happening, even though the 'person' attribute is getting updated. Any suggestions?

解决方案

This is due to the fact that as of version pre4 you cannot set a property or observable upon the Em.*.create() function. You have to first use the .extend() function first and set all your properties and observables in that, then create that object.

As an example, take a look at this jsfiddle that is working with the extend functionality. Then try to take it away by using only create and you'll see that the app no longer works.

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