function field_field_config_presave

Implements hook_ENTITY_TYPE_presave() for 'field_config'.

Determine the selection handler plugin ID for an entity reference field.

File

core/modules/field/field.module, line 394

Code

function field_field_config_presave(FieldConfigInterface $field) {
  // Don't change anything during a configuration sync.
  if ($field->isSyncing()) {
    return;
  }
  // Act on all sub-types of the entity_reference field type.
  /** @var \Drupal\Core\Field\FieldTypePluginManager $field_type_manager */
  $field_type_manager = \Drupal::service('plugin.manager.field.field_type');
  $item_class = 'Drupal\\Core\\Field\\Plugin\\Field\\FieldType\\EntityReferenceItem';
  $class = $field_type_manager->getPluginClass($field->getType());
  if ($class !== $item_class && !is_subclass_of($class, $item_class)) {
    return;
  }
  // Make sure the selection handler plugin is the correct derivative for the
  // target entity type.
  $target_type = $field->getFieldStorageDefinition()
    ->getSetting('target_type');
  $selection_manager = \Drupal::service('plugin.manager.entity_reference_selection');
  [$current_handler] = explode(':', $field->getSetting('handler'), 2);
  $field->setSetting('handler', $selection_manager->getPluginId($target_type, $current_handler));
  // In case we removed all the target bundles allowed by the field in
  // EntityReferenceItem::onDependencyRemoval() or field_entity_bundle_delete()
  // we have to log a critical message because the field will not function
  // correctly anymore.
  $handler_settings = $field->getSetting('handler_settings');
  if (isset($handler_settings['target_bundles']) && $handler_settings['target_bundles'] === []) {
    \Drupal::logger('entity_reference')->critical('The %field_name entity reference field (entity_type: %entity_type, bundle: %bundle) no longer has any valid bundle it can reference. The field is not working correctly anymore and has to be adjusted.', [
      '%field_name' => $field->getName(),
      '%entity_type' => $field->getTargetEntityTypeId(),
      '%bundle' => $field->getTargetBundle(),
    ]);
  }
}