TheOtherDude

import Ember from 'ember';
let count = 0
export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  model: {}
 	notified: Ember.computed('model', () => ++count),
  actions: {
   notify() {
  	// this.get('model').notifyPropertyChange('request')
    this.notifyPropertyChange('model') 

TheOtherDude

import Ember from 'ember';
let count = 0
export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  model: {request: {}},
 	notified: Ember.computed('model.request', () => ++count),
  actions: {
   notify() {
    this.notifyPropertyChange('model.request') 
   }

TheOtherDude

import Ember from 'ember';

export default Ember.Component.extend({
  displayProp: Ember.computed('prop', function() {
    return `Display ${this.get('prop.number')}`;
  }),
});