New Twiddle

components.todo-item.js

import Ember from 'ember';

export default Ember.Component.extend({
});

components.todo-list.js

import Ember from 'ember';

export default Ember.Component.extend({
	
});

router.js

import Ember from 'ember';
import config from './config/environment';

const Router = Ember.Router.extend({
  location: 'none',
  rootURL: config.rootURL
});

Router.map(function() {
  this.route('active');
  this.route('completed');
});

export default Router;

routes.active.js

import Ember from 'ember';

export default Ember.Route.extend({
  todoService: Ember.inject.service('todo'),
  
  model() {
   return this.get('todoService').get('activeTasks');  
  }
});

routes.completed.js

import Ember from 'ember';

export default Ember.Route.extend({
    todoService: Ember.inject.service('todo'),
  
  model() {
   return this.get('todoService').get('completedTasks');
  }
});

routes.index.js

import Ember from 'ember';

export default Ember.Route.extend( {
  todoService: Ember.inject.service('todo'),
  
  
  model() {
   return this.get('todoService').get('tasks');
  }
});

services.todo.js

import Ember from 'ember';

export default Ember.Service.extend({
  
  completedTasks: Ember.computed.filterBy('tasks', 'isCompleted', true),
  
    activeTasks: Ember.computed.filterBy('tasks', 'isCompleted', false),

  
  tasks: [{
  	name: 'First',
    isCompleted: false
  },{
  	name: 'Second',
    isCompleted: false
  },{
  	name: 'Third',
    isCompleted: false
  },{
  	name: 'Fourth',
    isCompleted: true
  },{
  	name: 'Fifth',
    isCompleted: true
  }]
  
});

styles.app.css

body {
  margin: 12px 16px;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 12pt;
}

ul {
	list-style:none;
}

templates.active.hbs

{{todo-list tasks=model}}

templates.application.hbs

<h1>todos</h1>
{{input placeholder="What needs to be done?"}}

<section>
{{outlet}}
</section>

<section>
	{{#link-to 'index'}}All{{/link-to}}
  {{#link-to 'active'}}Active{{/link-to}}
  {{#link-to 'completed'}}Completed{{/link-to}}
	<button>Clear all completed</button>
</section>

templates.completed.hbs

{{todo-list tasks=model}}

templates.components.todo-item.hbs

<input type="checkbox" id="first" checked={{task.isCompleted}}><label for="first">{{task.name}}</label> <button>clear item</button>

templates.components.todo-list.hbs

<ul>
{{#each tasks as |task|}}
	{{todo-item task=task}}
{{/each}}
</ul>
<span> 2 items left</span>

templates.index.hbs

{{todo-list tasks=model}}

twiddle.json

{
  "version": "0.12.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.12.0",
    "ember-template-compiler": "2.12.0",
    "ember-testing": "2.12.0"
  },
  "addons": {
    "ember-data": "2.12.1"
  }
}