New Twiddle

controllers.application.js

import Ember from 'ember';

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

models.post.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('string'),
  user: belongsTo()
});

models.user.js

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

export default Model.extend({
  post: hasMany()
});

routes.application.js

import Ember from 'ember';

export default Ember.Route.extend({
  model(){
    return this.store.createRecord('post'); 
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{outlet}}

<h1>Edit Post</h1>
{{#bs-form model=(changeset model) as |form|}}
		{{form.element controlType="text" label="Name"}}

    {{#form.element controlType="model-select" propertyName="user" label="User" as |el|}}
        {{el.control}}
    {{/form.element}}
{{/bs-form}}
<br>
<br>

twiddle.json

{
  "version": "0.15.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "3.2.2",
    "ember-template-compiler": "3.2.2",
    "ember-testing": "3.2.2"
  },
  "addons": {
    "ember-data": "3.2.0",
    "ember-changeset": "1.5.0",
    "ember-bootstrap": "2.0.0",
    "bootstrap": "4.1.0",
    "ember-model-select": "0.1.0-alpha.4",
    "ember-bootstrap-model-select": "0.1.0-alpha.3"
  }
}