Required validation does not work for multiple select and empty array

[romario333]

Multiple select bound to model with ng-model and ng-options does not mark field as invalid if ng-model points to an empty array. Once you select and deselect value in select, validation starts to work as expected.

Here's the plunker demonstrating this issue.

Controller:

$scope.values = [
  {id: 1, name: 'one'},
  {id: 2, name: 'two'}
];
$scope.selectedValues = [];

HTML:

<select multiple 
  ng-required="true" 
  ng-model="selectedValues" 
  ng-options="value.name for value in values">
</select>

[romario333]

Similar issue is here: #2365

[petebacondarwin]

I have an easy fix for this. See #2365. Closing as a duplicate.