New Twiddle

controllers.application.js

import Ember from 'ember';

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

models.followup-status.js

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

export default Model.extend({
});

models.followup.js

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

export default Model.extend({
  followupStatus: belongsTo('FollowupStatus')
});

models.member.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:'test',
  followup: belongsTo('Followup'),
  donNotContact: Ember.computed.equal('followup.followupStatus.id', '2')
});

routes.application.js

import Ember from 'ember';

export default Ember.Route.extend({
  model(){
    return this.store.createRecord('Member', {
      followup: this.store.createRecord('Followup', {
        followupStatus: this.store.createRecord('FollowupStatus', {
          id: '2'
        })
      })
    });
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
name: {{model.name}}
<br>
doNotContact: {{model.doNotContact}}
<br>
<br>

twiddle.json

{
  "version": "0.10.6",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.9.0",
    "ember-data": "2.9.0",
    "ember-template-compiler": "2.9.0",
    "ember-testing": "2.9.0"
  },
 "addons": {
    "ember-cli-mirage": "0.1.14"
  }
}