function DefaultContentSubscriber::preExport

Reacts before an entity is exported.

Parameters

\Drupal\Core\DefaultContent\PreExportEvent $event: The event object.

File

core/modules/path/src/EventSubscriber/DefaultContentSubscriber.php, line 37

Class

DefaultContentSubscriber

Subscribes to default content-related events.

Namespace

Code

public function preExport(PreExportEvent $event) : void {
  $event->setCallback('field_item:path', function (PathItem $item) : array {
    $values = $item->getValue();
    // Never export the path ID; it is recreated on import.
    unset($values['pid']);
    return $values;
  });
  // Despite being computed, export path fields anyway because, even though
  // they're undergirded by path_alias entities, they're not true entity
  // references and therefore aren't portable.
  foreach ($this->entityFieldManager
    ->getFieldMapByFieldType('path') as $path_fields_in_entity_type) {
    foreach (array_keys($path_fields_in_entity_type) as $name) {
      $event->setExportable($name, TRUE);
    }
  }
}