New Twiddle

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  
  actions: {
    deleteRecord(item) {
      item.deleteRecord();
    }
  }
});

models.address.js

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

export default Model.extend({
  person: belongsTo()
});

models.cat.js

import Pet from "./pet";
import attr from "ember-data/attr";
import { belongsTo, hasMany } from "ember-data/relationships";

export default Pet.extend({
});

models.person.js

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

export default Model.extend({
  pets: hasMany({polymorphic: true}),
  addresses: hasMany(),
  
  firstPet: Ember.computed('pets.[]', function() {
    return this.get('pets.firstObject');
  }),
  
  firstAddress: Ember.computed('addresses.[]', function() {
    return this.get('addresses.firstObject');
  })
});

models.pet.js

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

export default Model.extend({
  person: belongsTo()
});

routes.application.js

import Ember from 'ember';

export default Ember.Route.extend({
  model() {
    const person = this.store.createRecord('person');
    
    const address = this.store.createRecord('address', {street: 'Main', person});
    const cat = this.store.createRecord('cat', {name: 'Garfield'});
    
    person.get('addresses').addObject(address);
    person.get('pets').addObject(cat);
    
    return person;
  }
});

templates.application.hbs

Addresses:
{{#each model.addresses as |address|}}
  <li>{{address.street}}</li>
{{/each}}

Pets:
{{#each model.pets as |pet|}}
  <li>{{pet.name}}</li>
{{/each}}

First address:<br>
new: {{model.firstAddress.isNew}}<br>
deleted: {{model.firstAddress.isDeleted}}<br>

<br>
First pet:<br>
new: {{model.firstPet.isNew}}<br>
deleted: {{model.firstPet.isDeleted}}<br>

<button {{action 'deleteRecord' model.firstAddress}}>delete first address</button>
<button {{action 'deleteRecord' model.firstPet}}>delete first pet</button>

tests.acceptance.polymorphic-model-test.js

import { test } from 'qunit';
import moduleForAcceptance from '../../tests/helpers/module-for-acceptance';

import Ember from 'ember';
import Model from "ember-data/model";

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



moduleForAcceptance('TODO: put something here');

const Person = Model.extend({
  addresses: hasMany(),
  pets: hasMany({polymorphic: true})
});

const Address = Model.extend({
  person: belongsTo()
});

const Pet = Model.extend({
  person: belongsTo()
});

const Cat = Pet.extend();

test('visiting /polymorphic-model', function(assert) {
  const done = assert.async();

  const store = this.application.__container__.lookup('service:store');
  Ember.run(function() {
    const person = store.createRecord('person');
    const address = store.createRecord('address', {person});
    const cat = store.createRecord('cat', {person});
  
    person.get('addresses').addObject(address);
    person.get('pets').addObject(cat);
  
    assert.equal(person.get('addresses.length'), 1);
    assert.equal(person.get('pets.length'), 1);
    
    address.deleteRecord();
    cat.deleteRecord();

    assert.equal(person.get('addresses.length'), 0);
    assert.equal(person.get('pets.length'), 0, 'expected no pets after cat record was deleted');

    done();
  });
});

tests.helpers.destroy-app.js

import Ember from 'ember';

export default function destroyApp(application) {
  Ember.run(application, 'destroy');
}

tests.helpers.module-for-acceptance.js

import { module } from 'qunit';
import Ember from 'ember';
import startApp from '../helpers/start-app';
import destroyApp from '../helpers/destroy-app';

const { RSVP: { Promise } } = Ember;

export default function(name, options = {}) {
  module(name, {
    beforeEach() {
      this.application = startApp();

      if (options.beforeEach) {
        return options.beforeEach.apply(this, arguments);
      }
    },

    afterEach() {
      let afterEach = options.afterEach && options.afterEach.apply(this, arguments);
      return Promise.resolve(afterEach).then(() => destroyApp(this.application));
    }
  });
}

tests.helpers.resolver.js

import Resolver from '../../resolver';
import config from '../../config/environment';

const resolver = Resolver.create();

resolver.namespace = {
  modulePrefix: config.modulePrefix,
  podModulePrefix: config.podModulePrefix
};

export default resolver;

tests.helpers.start-app.js

import Ember from 'ember';
import Application from '../../app';
import config from '../../config/environment';

const { run } = Ember;
const assign = Ember.assign || Ember.merge;

export default function startApp(attrs) {
  let application;

  let attributes = assign({rootElement: "#test-root"}, config.APP);
  attributes = assign(attributes, attrs); // use defaults, but you can override;

  run(() => {
    application = Application.create(attributes);
    application.setupForTesting();
    application.injectTestHelpers();
  });

  return application;
}

tests.test-helper.js

import resolver from './helpers/resolver';
import {
  setResolver
} from 'ember-qunit';

setResolver(resolver);

twiddle.json

{
  "version": "0.10.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": true
  },
  "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": {}
}