New Twiddle

application.controller.js

import Ember from 'ember';

export default Ember.Controller.extend({
  model: Object.create({
    items: [
      { item_type: 'bid' },
      { item_type: 'bid' },
			{ item_type: 'donation' },
      { item_type: 'ticket' },
    ]
  }),
createArrays: Ember.on('init', Ember.observer('[email protected]_type', function() {
    console.log('observer fired');
  	const items = this.get('model.items'),
          itemsArray = [],
          donationsArray = [],
          rafflesArray = [],
          ticketsArray = [];
    
    items.forEach(item => {
    	switch (Ember.get(item, 'item_type')) {
        case 'bid':
          itemsArray.pushObject(item);
          break;
        case 'donation':
          donationsArray.pushObject(item);
          break;
        case 'ticket':
          ticketsArray.pushObject(item);
          break;
        default:
          rafflesArray.pushObject(item);
          break;
      }
    });
    
    this.setProperties({
    	itemsArray,
      donationsArray,
      ticketsArray,
      rafflesArray
    });
  })),

  actions: {
  	add(type) {
      console.time('a');
    	this.get('model.items').pushObject({
      	item_type: type
      });
      console.log('after pushobject');
      console.timeEnd('a');
    }
  }
});

application.template.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
Items array: <br/>
{{#each itemsArray as |item|}}
	{{item.item_type}}
{{/each}}
<hr/>
Donation array: <br/>
{{#each donationsArray as |item|}}
	{{item.item_type}}
{{/each}}
<hr/>
Tickets array: <br/>
{{#each ticketsArray as |item|}}
	{{item.item_type}}
{{/each}}
<hr/>
Raffles array: <br/>
{{#each rafflesArray as |item|}}
	{{item.item_type}}
{{/each}}
<br>
<br>
<button {{action 'add' 'bid'}}>Add item</button><button {{action 'add' 'donation'}}>Add donation</button><button {{action 'add' 'ticket'}}>Add ticket</button><button {{action 'add' 'raffle'}}>Add raffle</button>

twiddle.json

{
  "version": "0.5.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.2.0/ember.debug.js",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/2.2.0/ember-data.js",
    "ember-template-compiler": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.2.0/ember-template-compiler.js"
  }
}