我如何可以回滾一個屬於關聯模型

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DEBUG: jQuery  : 1.11.1 ember-1.9.1.js:3935 
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我必須模型就像這樣：我如何可以回滾一個屬於關聯模型

Hwv.Car = DS.Model.extend({ 
    number: DS.attr('string'), 
    owner: DS.belongsTo('user') 
}); 
Hwv.User = DS.Model.extend({ 
    name: DS.attr('string'), 
    phone: DS.attr('string'), 
    email: DS.attr('string') 
});

然後我在模板中使用的選擇輸入：

{{#if isEditing}} 
    {{view "select" id = "owner" class="form-control" 
    content=owners 
    optionLabelPath="content.name" 
    optionValuePath="content.id" 
    prompt="--please select a user--" 
    selection=selectedOwner 
    }} 
    <span class="glyphicon form-control-feedback"></span> 
{{else}} 
    <p class="form-control-static">{{owner.name}}</p> 
{{/if}}

和我的控制器就像是這個：

Hwv.CarController = Ember.ObjectController.extend({ 
    needs:["application","session"], 
    isEditing:false, 
    isNew:false, 
    owners:function(){ 
     var model = this.get('model'), 
      store = this.store; 
     return store.filter('user', function (user) { 
      return true; 
     }); 
    }.property(), 
    selectedOwner:function(k,v){ 
     var model = this.get('model'); 
     if(!model){ 
      return; 
     } 
     if (v === undefined) { 
      return model.get("owner"); 
     } else { 
      debugger; 
      model.set('owner', v); 
      debugger; 
      return v; 
     } 
    }.property("model.owner"), 
    selectedOwnerDidChange: function() { 
     debugger; 
     //if i remove this row ,the car model can't be dirty when the owner of the car is changed by the select input. 
     this.get('model').send('becomeDirty'); 
    }.observes('selectedOwner'), 
    actions:{ 
     cancel:function(){ 
      //this row will work when i change the car number only and then click the cancel button 
      //but when i change the car owner by the select input,the car model can't rollback successfully. 
      this.get("model").rollback(); 
     } 
    } 
});

這個問題似乎指出該ember數據無法成功回滾belongsTo模型，並且即使在belongsTo屬性發生更改時，它也不能準確標記該模型的髒屬性。

我問：我怎樣才能解決與車主belongsTo模型的回滾問題就像上面。

來源

2014-12-30 lit_yin