Adding to a RecordArray

application.controller.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName:'Ember Twiddle'
});

application.template.hbs

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

index.controller.js

import Ember from 'ember';

export default Ember.Controller.extend({
  actions: {
    addUser() {
      this.store.createRecord('user', {
        name: 'Jane'
      });
    }
  }
});

index.route.js

import Ember from 'ember';
import DS from 'ember-data';

export default Ember.Route.extend({
  model: function() {
    this.store.push({
      id: 1,
      type: 'user',
      attributes: {
        name: 'John'
      }
    });

		return this.store.peekAll('user');
  }
});

index.template.hbs

<ul>
	{{#each model as |user|}}
  	<li>{{user.name}}</li>
	{{/each}}
</ul>

<button {{action 'addUser'}}>Add user</button>

models.user.js

import DS from 'ember-data';

export default DS.Model.extend({
  name: DS.attr('string')
});

twiddle.json

{
  "version": "0.4.10",
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/1.13.9/ember.debug.js",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/1.13.11/ember-data.js",
    "ember-template-compiler": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/1.13.9/ember-template-compiler.js"
  }
}