EntityReferenceFieldItemNormalizerTrait.php in Drupal 8

Namespace

Drupal\serialization\Normalizer

File

core/modules/serialization/src/Normalizer/EntityReferenceFieldItemNormalizerTrait.php

<?php

namespace Drupal\serialization\Normalizer;

use Drupal\Core\Field\Plugin\Field\FieldType\EntityReferenceItem;

/**
 * Converts empty reference values for entity reference items.
 */
trait EntityReferenceFieldItemNormalizerTrait {
  protected function normalizeRootReferenceValue(&$values, EntityReferenceItem $field_item) {

    // @todo Generalize for all tree-structured entity types.
    if ($this
      ->fieldItemReferencesTaxonomyTerm($field_item) && empty($values['target_id'])) {
      $values['target_id'] = NULL;
    }
  }

  /**
   * Determines if a field item references a taxonomy term.
   *
   * @param \Drupal\Core\Field\Plugin\Field\FieldType\EntityReferenceItem $field_item
   *
   * @return bool
   */
  protected function fieldItemReferencesTaxonomyTerm(EntityReferenceItem $field_item) {
    return $field_item
      ->getFieldDefinition()
      ->getSetting('target_type') === 'taxonomy_term';
  }

}

Traits

Name	Description
EntityReferenceFieldItemNormalizerTrait	Converts empty reference values for entity reference items.