New Twiddle

controllers.application.js

import Ember from 'ember';
import { buildValidations, validator } from 'ember-cp-validations';

const Validations = buildValidations({
  email: { 
    type: 'email',
    validators: [
    	validator('format'),
 			validator('uniqueness')
 		]
  }
});

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

templates.application.hbs

{{input value=(mut email) placeholder="Enter an email"}}

{{validations.attrs.email.message}}

twiddle.json

{
  "version": "0.10.7",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.10.0",
    "ember-data": "2.10.0",
    "ember-template-compiler": "2.10.0",
    "ember-testing": "2.10.0"
  },
  "addons": {
    "ember-cp-validations": "3.1.5"
  }
}

validators.uniqueness.js

import BaseValidator from 'ember-cp-validations/validators/base';

export default BaseValidator.extend({
  validate(value, options) {
    console.log(value + ' should have been an email?');
    return ' and open the console';
  }
});