function WidgetBase::addMoreSubmit

Submission handler for the "Add another item" button.

File

core/lib/Drupal/Core/Field/WidgetBase.php, line 291

Class

WidgetBase

Base class for 'Field widget' plugin implementations.

Namespace

Code

public static function addMoreSubmit(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));
    $field_name = $element['#field_name'];
    $parents = $element['#field_parents'];
    // Increment the items count.
    $field_state = static::getWidgetState($parents, $field_name, $form_state);
    $field_state['items_count']++;
    static::setWidgetState($parents, $field_name, $form_state, $field_state);
    $form_state->setRebuild();
}