控制器的定義，但無法找到

Question

當試圖讓nodeEditController從nodeController:startEditing，我得到以下問題：

Uncaught TypeError: Cannot call method 'set' of undefined 

這是NodeController：

SettingsApp.NodeController = Ember.ObjectController.extend({ 
    isEditing: false, 

    startEditing: function() { 
     debugger; 
     var nodeEditController = this.get('controllers.nodeEdit'); 
     nodeEditController.set('content', this.get('content')); 
     nodeEditController.startEditing(); 
     this.set('isEditing', true); 
    }, 
    ... 

這是NodeEditController ：

SettingsApp.NodeEditController = Ember.ObjectController.extend({ 
    needs: ['node'], 

    startEditing: function() { 
     //debugger; 
     // add the contact and its associated phone numbers to a local transaction 
     var node = this.get('content'); 
     var transaction = node.get('store').transaction(); 
     transaction.add(node); 
     // contact.get('phones').forEach(function (phone) { 
     // transaction.add(phone); 
     // }); 
     this.transaction = transaction; 
    }, 
    ... 

發生錯誤我N線：

nodeEditController.set('content', this.get('content')); 

因爲：

var nodeEditController = this.get('controllers.nodeEdit'); 

返回undefined。這是爲什麼？ NodeEditController已定義！

Answer 1

的NodeController缺少needs屬性：

SettingsApp.NodeController = Ember.ObjectController.extend({ 
    needs : ["nodeEdit"], 
    isEditing: false, 

    startEditing: function() { 
     debugger; 
     var nodeEditController = this.get('controllers.nodeEdit'); 
     nodeEditController.set('content', this.get('content')); 
     nodeEditController.startEditing(); 
     this.set('isEditing', true); 
    }, 
    ...