this.get在控制器是「不」的函數

Question

我想設置一個HTML元素的風格，我閱讀，我必須這樣做，這樣說：

bid: { 
    popUpContainerDisplay: "none", 
    popUpDisplay: Ember.computed('bid.popUpContainerDisplay', function() { 
    return Ember.String.htmlSafe("display: " + this.get('bid.popUpContainerDisplay')); 
    }) 
}, 

然後在我的HBS文件我寫

<div id="popUpContainer" style={{bid.popUpDisplay}}> 

然而，這是給我一些錯誤：

jQuery.Deferred exception: this.get is not a function TypeError: this.get is not a function 
at Object.<anonymous> (http://localhost:4200/assets/auction-ember.js:53:77) 
at ComputedPropertyPrototype.get (http://localhost:4200/assets/vendor.js:26852:28) 
at Object.get (http://localhost:4200/assets/vendor.js:31759:19) 
at NestedPropertyReference.compute (http://localhost:4200/assets/vendor.js:24910:28) 
at NestedPropertyReference.value (http://localhost:4200/assets/vendor.js:24720:45) 
at ReferenceCache.initialize (http://localhost:4200/assets/vendor.js:55111:52) 
at ReferenceCache.peek (http://localhost:4200/assets/vendor.js:55085:29) 
at DynamicAttribute.flush (http://localhost:4200/assets/vendor.js:58752:35) 
at SimpleElementOperations.addAttribute (http://localhost:4200/assets/vendor.js:58414:36) 
at SimpleElementOperations.addDynamicAttribute (http://localhost:4200/assets/vendor.js:58374:22) undefinedjQuery.Deferred.exceptionHook @ jquery.js:3846process @ jquery.js:3642 

jquery.js:3855Uncaught TypeError: this.get is not a function(…) 

我在做什麼錯？謝謝。

Answer 1

get方法在您嘗試使用它的對象內部不存在。

那get方法來自Ember.Observable，這是由Ember.Object類使用。你所要做的就是聲明bid屬性作爲Ember.Object，使用擴展或創建，像這樣：

bid: Ember.Object.extend({ 
    popUpContainerDisplay: "none", 
    popUpDisplay: Ember.computed('bid.popUpContainerDisplay', function() { 
     return Ember.String.htmlSafe("display: " + this.get('bid.popUpContainerDisplay')); 
    }) 
}) 

Answer 2

你需要把計算的地產出bid。

bid: { 
    popUpContainerDisplay: "none" 
}, 
popUpDisplay: Ember.computed('bid.popUpContainerDisplay', function() { 
    return Ember.String.htmlSafe("display: " + this.get('bid.popUpContainerDisplay')); 
})