function FieldConfig::preDelete

Overrides ConfigEntityBase::preDelete

File

core/modules/field/src/Entity/FieldConfig.php, line 209

Class

FieldConfig

Defines the Field entity.

Namespace

Code

public static function preDelete(EntityStorageInterface $storage, array $fields) {
  /** @var \Drupal\Core\Field\DeletedFieldsRepositoryInterface $deleted_fields_repository */
  $deleted_fields_repository = \Drupal::service('entity_field.deleted_fields_repository');
  $entity_type_manager = \Drupal::entityTypeManager();
  parent::preDelete($storage, $fields);
  // Keep the field definitions in the deleted fields repository so we can use
  // them later during field_purge_batch().
  /** @var \Drupal\field\FieldConfigInterface $field */
  foreach ($fields as $field) {
    // Only mark a field for purging if there is data. Otherwise, just remove
    // it.
    $target_entity_storage = $entity_type_manager->getStorage($field->getTargetEntityTypeId());
    if (!$field->deleted && $target_entity_storage instanceof FieldableEntityStorageInterface && $target_entity_storage->countFieldData($field->getFieldStorageDefinition(), TRUE)) {
      $field = clone $field;
      $field->deleted = TRUE;
      $field->fieldStorage = NULL;
      $deleted_fields_repository->addFieldDefinition($field);
    }
  }
}