Model prop undefined

controllers.application\.js

import Ember from 'ember';
export default Ember.Controller.extend({
  example: Ember.computed(function() {
    const rec = this.store.createRecord('my-model', {
      
    });
    
    console.log(rec);
  })
});

models.my-model\.js

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

export default Model.extend({
  foo: attr('string')
});

templates.application\.hbs

<h1>Test model prop undefined</h1>
<br>
<br>
{{example}}
<br>
<br>

twiddle\.json

{
  "version": "0.16.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "3.14.3",
    "ember-template-compiler": "3.14.3",
    "ember-testing": "3.14.3"
  },
  "addons": {
    "ember-data": "3.14.1"
  }
}