public static function Select2::processSelect in Select 2 8

Processes a select list form element.

This process callback is mandatory for select fields, since all user agents automatically preselect the first available option of single (non-multiple) select lists.

Parameters

array $element: The form element to process.

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

array $complete_form: The complete form structure.

Return value

array The processed element.

Overrides Select::processSelect

File

src/Element/Select2.php, line 174

Class

Select2: Provides an select2 form element.

Namespace

Drupal\select2\Element

Code

public static function processSelect(&$element, FormStateInterface $form_state, &$complete_form) {

  // Fill the options, because in autocomplete we cleared them and for the
  // validation the at least selected options are needed.
  if ($element['#autocomplete']) {
    $value_callable = isset($element['#autocomplete_options_callback']) ? $element['#autocomplete_options_callback'] : NULL;
    if (!$value_callable || !is_callable($value_callable)) {
      $value_callable = '\\Drupal\\select2\\Element\\Select2::getValidSelectedOptions';
    }
    $element['#options'] = call_user_func_array($value_callable, [
      $element,
      $form_state,
    ]);
  }

  // We need to disable form validation, because with autocreation the options
  // could contain non existing references. We still have validation in the
  // entity reference field.
  if ($element['#autocreate'] && $element['#target_type']) {
    unset($element['#needs_validation']);

    // Add back auto_create values.
    $values = is_array($element['#value']) ? $element['#value'] : [
      $element['#value'],
    ];
    foreach ($values as $key => $value) {
      if (is_string($key) && substr($key, 0, 4) === "\$ID:") {

        // Set option and remove ID from label.
        $element['#options'][$key] = substr($value, 0, 4) === "\$ID:" ? substr($value, 4) : $value;
      }
      elseif (!$element['#multiple'] && substr($value, 0, 4) === "\$ID:") {
        $element['#options'][$value] = substr($value, 4);
      }
    }
  }
  if (!$element['#multiple'] && !isset($element['#options'][$element['#empty_value']])) {
    $empty_option = [
      $element['#empty_value'] => '',
    ];
    $element['#options'] = $empty_option + $element['#options'];
  }

  // Set the type from select2 to select to get proper form validation.
  $element['#type'] = 'select';
  return $element;
}

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