subroute model recomputation

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle'
});

router.js

import EmberRouter from '@ember/routing/router';
import config from './config/environment';

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

Router.map(function() {
  this.route('alpha');
  this.route('beta');
});

export default Router;

routes.alpha.js

import Ember from 'ember';

let i = 0;

export default Ember.Route.extend({
  model() {
    return `alpha:${i++}`;
  }
});

routes.application.js

import Ember from 'ember';

let i = 0;

export default Ember.Route.extend({
  model() {
    return `application:${i++}`;
  }
});

routes.beta.js

import Ember from 'ember';

let i = 0;

export default Ember.Route.extend({
  model() {
    return `beta:${i++}`;
  }
});

templates.alpha.hbs

alpha model count: {{model}}

templates.application.hbs

<h1>Subroute model recomputation</h1>

{{link-to 'alpha subroute' 'alpha'}}
<br>
{{link-to 'beta subroute' 'beta'}}
<br>
<br>
application model count: {{model}}
<br>
{{outlet}}
<br>
<br>

templates.beta.hbs

beta model count: {{model}}

twiddle.json

{
  "version": "0.15.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "3.4.3",
    "ember-template-compiler": "3.4.3",
    "ember-testing": "3.4.3"
  },
  "addons": {
    "ember-data": "3.4.2"
  }
}