Extended Ember Validations Controller Mixin extend original ember validations component controller mixin with IsValid & IsInvalid properties for each validated property and model validation errors array.

extended-ember-validations-controller.js

// This mixin extend original ember validations component controller mixin with
// IsValid & IsInvalid properties for each validated property and model validation errors array
// Module import for Ember
import Ember from 'ember';
// Module import for Ember-Validations component
import EmberValidations from 'ember-validations';
// Module export for extended ember validations controller mixin definition
export default Ember.Mixin.create(EmberValidations.Mixin,{
  init() {
    // this call is necessary to execute parent activate hook if existed and avoid overriding it
    this._super();
    // get mixin reference
    let mixin = this,
    // get validated properties list
      properties =_.uniq(_.map(Ember.get(mixin, 'validators'),validator=> validator.property));
    // Define IsValid & IsInvalid properties for each validated property
    _.each(properties, function (property) {
      // Define [propertyName]IsValid Ember computed property for validated property
      Ember.defineProperty(mixin, property + 'IsValid', Ember.computed(property, function () {
        return Ember.get(mixin, 'errors.' + property).length === 0;
      }));
      // Define [propertyName]IsInvalid Ember computed property for validated property
      Ember.defineProperty(mixin, property + 'IsInvalid', Ember.computed(property, function () {
        return Ember.get(mixin, 'errors.' + property).length > 0;
      }));
    });
  },
  // an Ember property that represent model validation errors array
  modelErrors: Ember.computed('validators.@each.isValid', function () {
    let mixin = this, // get mixin reference
      messages = [],  // error messages container
      validators = _.keys(Ember.get(mixin, 'errors')); // get validation properties list
    _.each(validators, function (validator) {
      // push error messages for each validation property
      messages.pushObjects(Ember.get(mixin, 'errors.' + validator));
    });
    // return all error messages
    return messages;
  })
});