New Twiddle

adapters.user.js

import DS from "ember-data";

export default DS.JSONAPIAdapter.extend({
  findRecord(store, type, id, snapshot) {
    console.log(type, id)
    return {
      data: {
        id: '1',
				type: 'users',
        relationships: {
          cards: {
            data: [{
              id: '1',
              type: 'cards'
            }]
          }
        }
      },
      included: [{
        id: '1',
        type: 'cards'
      }]
    }
  }
});

controllers.application.js

import Ember from 'ember';

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

models.card.js

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

export default Model.extend({
  title: attr('string'),
  description: attr('string'),
  users: hasMany('user')
});

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({
  email: attr('string'),
  name: attr('string'),
  cards: hasMany('card')
});

routes.index.js

import Ember from 'ember';

export default Ember.Route.extend({
  model() {
    this.store.findRecord('user', '1')
      .then(user => user.get('cards'))
      .then(cards => console.log(cards));
  }
});

templates.application.hbs

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

twiddle.json

{
  "version": "0.10.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.6.0",
    "ember-data": "2.6.1",
    "ember-template-compiler": "2.6.0"
  },
  "addons": {}
}