在自定义句柄助手中访问Ember.Mixin [英] Accessing an Ember.Mixin within a custom handlebars helper

问题描述

在我的例子中，我有一个mixin， App.Format 其中包含一些不同的格式化数字，日期等等的方法，我想通过自定义帮助者直接从模板访问这些方法（例如 {{formatNumber 450324}} ）。我不是直接将方法实现直接在帮助器而不是mixin的原因是我还需要这些方法在控制器，视图等中可用。为了保持我的代码DRY，我绝对不想在mixin和helpers中有重复的代码。

是否有任何规范的emberish方式要完成这个，或者我只是完全错误的想法呢？

编辑：这是一个jsbin来更好地说明问题：

http://emberjs.jsbin.com/wunug/1/edit?html,js,output （看第33-37行）

解决方案

方法 Mixin.apply 使得工作。

  Ember.Handlebars.helper（'formatNumber'，function（num，decimals）{
 var format = App.Format.apply（{}）; 
 return format.formatNumber（num，decimals || 2）; 
}）; 
  

Is there an elegant way of using methods defined in an Ember.Mixin object within a custom handlebars helper?

For example, in my case I have a mixin, App.Format which contains a bunch of different methods for formatting numbers, dates, ect and I would like to make some of these methods accessible directly from templates via custom helpers (e.g. {{formatNumber 450324}}). The reason I don't just put the method implementation directly in the helper instead of the mixin is that I also need these methods to be available in controllers, views, ect. And in the interest of keeping my code DRY, I definitely do not want to have duplicate code in the mixin and the helpers.

Is there any canonical, "emberish" way to accomplish this, or am I just thinking about it in the completely wrong way altogether?

Edit: Here is a jsbin to better illustrate the problem:

http://emberjs.jsbin.com/wunug/1/edit?html,js,output (look at lines 33-37)

解决方案

The method Mixin.apply makes the job.

Ember.Handlebars.helper('formatNumber', function(num, decimals) {
  var format = App.Format.apply({});
  return format.formatNumber(num, decimals || 2);
});

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