New Twiddle

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  
  init() {
    this._super(...arguments);
    console.clear();
    this.get('store').createRecord('profile', {id: 0, name: 'Captain America'});
  },
  
  profile: Ember.computed(function() {
  	return this.get('store').peekRecord('profile', 0);
  })
  
});

controllers.first-route.js

import Ember from 'ember';

export default Ember.Controller.extend({
  actions: {
  	changeHero() {
    	const x = this.get('store').peekRecord('profile', 0);
      x.set('name', 'Iron Man');
    }
  }
});

controllers.second-route.js

import Ember from 'ember';

export default Ember.Controller.extend({
  actions: {
  	changeHero() {
    	const x = this.get('store').peekRecord('profile', 0);
      x.set('name', 'SpiderMan');
    }
  }
});

models.profile.js

import Model from "ember-data/model";
import attr from "ember-data/attr";
import { belongsTo, hasMany } from "ember-data/relationships";

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

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('first-route')
  this.route('second-route')
});

export default Router;

routes.first-route.js

import Ember from 'ember';

export default Ember.Route.extend({
  model() {
   return this.get('store').peekRecord('profile', 0);
  }
});

routes.second-route.js

import Ember from 'ember';

export default Ember.Route.extend({
  model() {
   return this.get('store').peekRecord('profile', 0);
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
My name is {{profile.name}}

<br>
<br>
 edit in the application level: {{input value=profile.name}}
<br>
<br>

{{#link-to 'first-route'}}First route{{/link-to}}
{{#link-to 'second-route'}}Second route{{/link-to}}

<br>
<br>



{{outlet}}
<br>
<br>

templates.first-route.hbs

<h2>First Route</h2>
current hero: {{model.name}}
<br>
<button {{action 'changeHero'}}>It clearly should be Iron Man</button>

templates.second-route.hbs

<h2>Second Route</h2>
current hero: {{model.name}}
<br>
<button {{action 'changeHero'}}>It should be SpiderMan</button>

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"
  }
}