public static function WidgetBase::addMoreAjax in Drupal 8
Same name and namespace in other branches
- 9 core/lib/Drupal/Core/Field/WidgetBase.php \Drupal\Core\Field\WidgetBase::addMoreAjax()
Ajax callback for the "Add another item" button.
This returns the new page content to replace the page content made obsolete by the form submission.
File
- core/
lib/ Drupal/ Core/ Field/ WidgetBase.php, line 313
Class
- WidgetBase
- Base class for 'Field widget' plugin implementations.
Namespace
Drupal\Core\FieldCode
public static function addMoreAjax(array $form, FormStateInterface $form_state) {
$button = $form_state
->getTriggeringElement();
// Go one level up in the form, to the widgets container.
$element = NestedArray::getValue($form, array_slice($button['#array_parents'], 0, -1));
// Ensure the widget allows adding additional items.
if ($element['#cardinality'] != FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED) {
return;
}
// Add a DIV around the delta receiving the Ajax effect.
$delta = $element['#max_delta'];
$element[$delta]['#prefix'] = '<div class="ajax-new-content">' . (isset($element[$delta]['#prefix']) ? $element[$delta]['#prefix'] : '');
$element[$delta]['#suffix'] = (isset($element[$delta]['#suffix']) ? $element[$delta]['#suffix'] : '') . '</div>';
return $element;
}