Computed Problems

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  
  data: [
    { toggle: true, nested: { toggle: true } },
    { toggle: true, nested: { toggle: true } },
    { toggle: false, nested: { toggle: false } }
  ],
  
  count: Ember.computed('data.@each.toggle', function() {
    return this.get('data').filterBy('toggle').length;
  }),
  
  nestedCount: Ember.computed('data.@each.nested.toggle', function() {
    return this.get('data').filterBy('nested.toggle').length;
  })
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{outlet}}

Count: {{count}}<br>

{{#each data as |value|}}
	{{input type="checkbox" checked=value.toggle}}
{{/each}}

<br>

nestedCount: {{nestedCount}}<br>

{{#each data as |value|}}
	{{input type="checkbox" checked=value.nested.toggle}}
{{/each}}
<br>
<br>

twiddle.json

{
  "version": "0.10.6",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.9.0",
    "ember-data": "2.9.0",
    "ember-template-compiler": "2.9.0",
    "ember-testing": "2.9.0"
  },
  "addons": {}
}