public static function Select2Widget::validateElement in Select 2 8

Form validation handler for widget elements.

Parameters

array $element: The form element.

\Drupal\Core\Form\FormStateInterface $form_state: The form state.

Overrides OptionsWidgetBase::validateElement

File

src/Plugin/Field/FieldWidget/Select2Widget.php, line 81

Class

Select2Widget

Plugin implementation of the 'select2' widget.

Namespace

Drupal\select2\Plugin\Field\FieldWidget

Code

public static function validateElement(array $element, FormStateInterface $form_state) {
  if ($element['#required'] && $element['#value'] == '') {
    $form_state
      ->setError($element, t('@name field is required.', [
      '@name' => $element['#title'],
    ]));
  }

  // Massage submitted form values.
  // Drupal\Core\Field\WidgetBase::submit() expects values as
  // an array of values keyed by delta first, then by column, while our
  // widgets return the opposite.
  if (is_array($element['#value'])) {
    $values = array_values($element['#value']);
  }
  else {
    $values = [
      $element['#value'],
    ];
  }

  // Filter out the '' option. Use a strict comparison, because
  // 0 == 'any string'.
  $index = array_search('', $values, TRUE);
  if ($index !== FALSE) {
    unset($values[$index]);
  }
  $items = static::prepareFieldValues($values, $element);
  $form_state
    ->setValueForElement($element, $items);
}