route model laziness

application.controller.js

import Ember from 'ember';

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

application.route.js

import Ember from 'ember';

let next = function(previous = 0) {
  return ++previous;
};

export default Ember.Route.extend({
  model: function(params) {
    console.log('params', params);
    return {id: next(params.previous)};
  }
});

application.template.hbs

<h1>Welcome to {{appName}}</h1>
model hook invoked: <b>{{model.id}}</b>
{{#link-to 'next' model.id}}Next{{/link-to}}

<br>
<br>
{{outlet}}
<br>
<br>

next.route.js

import Ember from 'ember';

let next = function(previous = 0) {
  return ++previous;
};

export default Ember.Route.extend({
  model: function(params) {
    console.log('params', params);
    var model = {id: next(params.previous)};
    console.log('model', model);
    return model;
  }
  /*,
  
  setupController: function(controller, model) {
    console.log('setupController called');
    this._super(...arguments);
  }*/
});

router.js

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

var Router = Ember.Router.extend({
  location: config.locationType
});

Router.map(function() {
  this.route('next', {path: '/next/:previous'});
});

export default Router;

twiddle.json

{
  "version": "0.4.13",
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/1.13.10/ember.debug.js",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/1.13.13/ember-data.js",
    "ember-template-compiler": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/1.13.10/ember-template-compiler.js"
  }
}