Question

我有一个带有People模型的Ember.js ArrayController。我正在尝试创建一个计算属性，用于生成人体重的平均值。看起来这应该相当容易，但我被卡住了。这是我的代码。

App.PeopleController = Ember.ArrayController.extend({

  //each model in the array has a "weight" property

  averageWeight: function() {
    //I don't know what to do here
  }.property('@each.weight')
});

把手代码。

{{#each controller}}
   {{name}}
{{/each}}

Average weight: {{weight}}

Answer 1

想出来。出于某种原因，您需要使用'content。@ each'来访问计算属性中的模型数据。

averageWeight: function(val) {
    var weights = this.get('content.@each.weight').toArray(); //this is the critical part!

    weights.forEach(function(val)) {
        //calc average here
    }

    return average;
}.property('@each.weight')

Ember.js使用ArrayController计算属性

1 个答案: