Data Relationships

adapters.application.js

import LSAdapter from 'ember-localstorage-adapter';

export default LSAdapter.extend({
  namespace: 'twiddleApp'
});

components.drop-down.js

import Ember from 'ember';

export default Ember.Component.extend({
  tagName: 'select'
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Data relationship demo'
});

instance-initializers.create-store-entries.js

import RSVP from 'rsvp';

export function initialize(appInstance) {
	const store = appInstance.lookup('service:store');
  //console.log('DEBUG: creating initial store entries');
	const promises = [];
  
  // Leak the store for debugging / testing
  window.debug = {
    store
  };
  
  // Roles
  let camera = store.createRecord('role', {
  	name: 'Camera',
  })

  // Drivers
  let usbCamera = store.createRecord('driver', {
  	name: 'USB camera',
    roles: [ camera ]
  })
  promises.push(usbCamera.save());
  let networkCamera = store.createRecord('driver', {
  	name: 'Network camera',
    roles: [ camera ]
  })
  promises.push(networkCamera.save());
  
  camera.set('drivers', [ usbCamera, networkCamera ]);
  promises.push(camera.save());

  // Devices
  let device = store.createRecord('device', {
  	name: 'Camera 1',
    driver: usbCamera
  })
  promises.push(device.save());

  device = store.createRecord('device', {
  	name: 'Camera 2',
    driver: usbCamera
  })
  promises.push(device.save());
  
  device = store.createRecord('device', {
  	name: 'Camera 3',
    driver: networkCamera
  })
  promises.push(device.save());

  return RSVP.all(promises);
}

export default {
	name: 'create-store-entries',
	after: 'ember-data',
	initialize
};

models.device.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'),
    driver: belongsTo('driver'),
});

models.driver.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'),
    devices: hasMany('device'),
    roles: hasMany('role'),
});

models.role.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'),
    driver: belongsTo('driver')
});

routes.application.js

import Ember from 'ember';
import RSVP from 'rsvp';

export default Ember.Route.extend({
  model() {
  	return RSVP.hash({
      roles: this.get('store').findAll('role'),
      devices: this.get('store').findAll('device'),
      drivers: this.get('store').findAll('driver')
    })
  }
});

serializers.application.js

import { LSSerializer } from 'ember-localstorage-adapter';

export default LSSerializer.extend();

templates.application.hbs

<h1>{{appName}}</h1>

<h2>Roles</h2>
<ul>
{{#each model.roles as |role|}}
 	{{!log 'role' role}}
  <li>{{role.name}} has the following drivers:
    <ul>{{#each role.drivers as |driver|}}
    	{{!log 'driver' driver}}
    	<li>{{driver.name}} is used by the following devices:
        <ul>{{#each driver.devices as |device|}}
          {{!log 'device' device}}
          <li>{{device.name}}</li>
        {{/each}}</ul>
      </li>
    {{/each}}</ul>
    <br>
    FIXME: How can I make a drop-down of all {{role.name}} instances here? {{drop-down options=getOptions}}
  </li>
{{/each}}
</ul>



<br>
{{outlet}}
<br>

templates.components.drop-down.hbs

{{#each options as |option|}}
{{log 'option' option}}
<option value={{option.value}} selected={{option.isSelected}}>{{option.name}}</option>
{{/each}}

tests.helpers.destroy-app.js

import Ember from 'ember';

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

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": "0.12.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.12.0",
    "ember-template-compiler": "2.12.0",
    "ember-testing": "2.12.0"
  },
  "addons": {
    "ember-data": "2.12.1",
    "ember-localstorage-adapter": "1.0.0"
  }
}