function views_post_update_filter_placeholder_text in Drupal 8

Add placeholder settings to string or numeric filters.

File

core/modules/views/views.post_update.php, line 252

Post update functions for Views.

Code

function views_post_update_filter_placeholder_text() {

  // Load all views.
  $views = \Drupal::entityTypeManager()
    ->getStorage('view')
    ->loadMultiple();

  /** @var \Drupal\views\Plugin\ViewsHandlerManager $filter_manager */
  $filter_manager = \Drupal::service('plugin.manager.views.filter');

  /* @var \Drupal\views\Entity\View[] $views */
  foreach ($views as $view) {
    $displays = $view
      ->get('display');
    $save = FALSE;
    foreach ($displays as $display_name => &$display) {
      if (isset($display['display_options']['filters'])) {
        foreach ($display['display_options']['filters'] as $filter_name => &$filter) {

          // Any of the children of the modified classes will also be inheriting
          // the new settings.
          $filter_instance = $filter_manager
            ->getHandler($filter);
          if ($filter_instance instanceof StringFilter) {
            if (!isset($filter['expose']['placeholder'])) {
              $filter['expose']['placeholder'] = '';
              $save = TRUE;
            }
          }
          elseif ($filter_instance instanceof NumericFilter) {
            if (!isset($filter['expose']['placeholder'])) {
              $filter['expose']['placeholder'] = '';
              $save = TRUE;
            }
            if (!isset($filter['expose']['min_placeholder'])) {
              $filter['expose']['min_placeholder'] = '';
              $save = TRUE;
            }
            if (!isset($filter['expose']['max_placeholder'])) {
              $filter['expose']['max_placeholder'] = '';
              $save = TRUE;
            }
          }
        }
      }
    }
    if ($save) {
      $view
        ->set('display', $displays);
      $view
        ->save();
    }
  }
}