Alias controller property to model

controllers.application.js

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',

  items: [],

  totalChanged: Ember.observer('total', function() {
    console.log('totalChanged');
    let model = this.get('moddel');
    
    if (model && !model.isDestroyed) {
      model.set('total', this.get('total'));
    }
  }),

  total: Ember.computed.readOnly('items.length'),

  actions: {
    addItem() {
      this.get('items').addObject({});
    }
  }
});

models.my-model.js

import Model from "ember-data/model";
import attr from "ember-data/attr";
import { belongsTo, hasMany } from "ember-data/relationships";

export default Model.extend({
  total: attr('number')
});

templates.application.hbs

<button {{action 'addItem'}}>Add item</button>
<hr>	
Controller total : {{total}}<br>
Model total : {{model.total}}<br>

twiddle.json

{
  "version": "0.11.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.10.2",
    "ember-data": "2.11.0",
    "ember-template-compiler": "2.10.2",
    "ember-testing": "2.10.2"
  },
  "addons": {}
}