产生emberJS

Question

林在运行时的方法试图在运行时生成的余烬和代码一些方法我想是

App.TestController = Ember.ArrayController.extend App.AnotherMixin, 

    unsubmitted: Em.computed.filterBy("model", "unsubmitted", true) 
    submitted: Em.computed.filterBy("model", "submitted", true) 
    canceled: Em.computed.filterBy("model", "canceled", true) 
# Rather than using above methods I'm trying to generate them with meta-programming. 

    that: @ 
    defineAttributes: (-> 
    [ 
     "unsubmitted" 
     "submitted" 
     "cancelled" 
    ].forEach (f) -> 
     Em.defineProperty that , f, Em.computed.filterBy("model", f, true) 
     return 
    return 
).on("init") 

但它不是产生方法。那么我有什么遗漏？

Answer 1

您正在将that定义为控制器上的属性，但试图在您的defineAttributes方法中将其用作局部变量。将that更改为方法中的局部变量，它应该可以正常工作。或者更好，只需使用Coffeescript的胖箭头功能来保持当前值this：

defineAttributes: (-> 
    ['unsubmitted', 'submitted', 'cancelled'].forEach (f) => 
     Em.defineProperty this, f, Em.computed.filterBy('model', f, true) 
).on('init')