Ember.js filterBy

HTML

<script src="http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<script src="http://cdnjs.cloudflare.com/ajax/libs/handlebars.js/1.0.0/handlebars.js"></script>
<script src="http://builds.emberjs.com.s3.amazonaws.com/tags/v1.0.0/ember.js"></script>
<script type="text/x-handlebars">
    <h2>Welcome to Ember.js</h2>

    <a href="#posts">Go</a>

    {{outlet}}
  </script>

  <script type="text/x-handlebars" id="posts">
  <ul>
    {{#each codePosts}}
      <li>{{#link-to 'post' this}}{{title}}{{/link-to}}</li>
    {{/each}}
  </ul>
  </script>

  <script type="text/x-handlebars" id="post">

  <div class="page-header sub-header clearfix">      
    <h1>{{title}}</h1>
    <span style="float: left; font-size: 10px; color: gray;">{{date.weekday}}, {{date.month}} {{date.day}}, {{date.year}}</span>
    <span style="float: right; font-size: 10px; color: gray;">4:02 PM</span>
  </div>

</script>

CSS

body {
    font-family: sans-serif ;
    font-size:2em;
    line-height:150%;
}

JavaScript

App = Ember.Application.create();

/****************************************************
ROUTER AND STORE SETUP
****************************************************/

App.Router.map(function() {
  this.resource('posts');
  this.resource('post', { path: ':post_id'});
});

/****************************************************
MODELS
****************************************************/


/****************************************************
ROUTES
****************************************************/

App.PostsRoute = Ember.Route.extend({
  model: function() {
    return posts;
  }
});

/****************************************************
CONTROLLERS
****************************************************/

App.PostsController = Ember.ArrayController.extend({
    codePosts: Ember.computed.filterBy('model', 'category', 'Pizza')
});

/****************************************************
FIXTURES
****************************************************/

var posts = [{
	category: 'Code',
	id: 'cssbestpractices',
	title: "CSS Best Practices",
	date: {
		weekday: "Friday",
		month: "November",
		day: "1",
		year: "2013"
	}
}, {
	category: 'Code',
	id: 'namingfiles',
	title: "Naming Files",
	date: {
		weekday: "Thursday",
		month: "October",
		day: "24",
		year: "2013"
	}
}, {
	category: 'Pizza',
	id: 'seo-copy-block',
	title: "SEO Copy Block",
	date: {
		weekday: "Tuesday",
		month: "November",
		day: "5",
		year: "2013"
	}
}];

/****************************************************
GLOBAL
****************************************************/