Testing relationship

controllers.application.js

import Ember from 'ember';

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

routes.application.js

import Ember from 'ember';

export default Ember.Route.extend({
  model() {
    return fetch('/stations.json');  
  }
});

stations.json

{
  "data": [
    {
      "id": "15",
      "type": "stations",
      "attributes": {
        "name": "Test",
        "description": null,
        "slug": "test",
        "current_position": 1
      },
      "relationships": {
        "currently_playing": {
          "links": {
            "related": "http://localhost:3000/api/v1/schedules?filter[position][]=1&filter[station_id]=15"
          },
          "data": {
            "type": "schedules",
            "id": "4"
          }
        }
      }
    }
  ],
  "included": [
    {
      "id": "4",
      "type": "schedules",
      "attributes": {
        "position": 1,
        "status": "queued"
      },
      "relationships": {
        "track": {
          "links": {
            "related": "http://localhost:3000/api/v1/tracks/3103845"
          }
        },
        "station": {
          "links": {
            "related": "http://localhost:3000/api/v1/stations/15"
          }
        }
      }
    }
  ],
  "meta": {
    
  }
}

templates.application.hbs

<h1>Model test</h1>
{{this.model}}

twiddle.json

{
  "version": "0.15.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "3.4.3",
    "ember-template-compiler": "3.4.3",
    "ember-testing": "3.4.3"
  },
  "addons": {
    "ember-data": "3.4.2"
  }
}