Async Validator with Injection

controllers.application.js

import Ember from 'ember';
import Changeset from 'ember-changeset';
import lookupValidator from 'ember-changeset-validations';
import ValidationFactory from 'twiddle/validations/application-factory';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  store: Ember.inject.service('store'),
  
  init() {
    let changeset, validations;
    this._super();
    validations = ValidationFactory.create(this.get('store'));
    changeset = new Changeset({}, lookupValidator(validations), validations);
    changeset.validate();
    this.set('changeset', changeset);
  },
  
  error: Ember.computed('changeset.error', function() {
    return JSON.stringify(this.get('changeset.error'), null, 2);
  }),
});

services.store.js

import Ember from 'ember';


export default Ember.Service.extend({
  isOneAsync(v) {
  	return new Ember.RSVP.Promise((resolve) => {
      Ember.run.later(this, () => {
      	resolve(v == 1);
      }, 2000);
    });
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{outlet}}
<br>
Enter a value to validate if it is 1
<br>
{{input type='text' value=changeset.textValue}}
<br>
{{error}}

twiddle.json

{
  "version": "0.11.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.10.2",
    "ember-data": "2.11.0",
    "ember-template-compiler": "2.10.2",
    "ember-testing": "2.10.2"
  },
  "addons": {
   	"ember-changeset": "*",
    "ember-changeset-validations": "*"
  }
}

validations.application-factory.js

import validateIsOne from 'twiddle/validators/is-one';

export function create(store) {
  return {
  	textValue: validateIsOne({ store })
  };
};

validators.is-one.js

import Ember from 'ember';

export default function validateIsOne({ store }) {
  return (key, newValue, oldValue, changes, content) => {
    return store.isOneAsync(newValue)
      .then(isOne => isOne || 'The value entered is not 1');
  };
}