protected static function EntityResource::relationshipArityIsAffected in JSON:API 8

Checks whether relationship arity is affected.

Parameters

\Drupal\Core\Field\EntityReferenceFieldItemListInterface $old: The old (stored) entity references.

\Drupal\Core\Field\EntityReferenceFieldItemListInterface $new: The new (updated) entity references.

Return value

bool Whether entities already being referenced now have additional references.

See also

\Drupal\jsonapi\Normalizer\Value\RelationshipNormalizerValue::ensureUniqueResourceIdentifierObjects()

1 call to EntityResource::relationshipArityIsAffected()

EntityResource::createRelationship in src/Controller/EntityResource.php

Adds a relationship to a to-many relationship.

File

src/Controller/EntityResource.php, line 636

Class

EntityResource

Process all entity requests.

Namespace

Drupal\jsonapi\Controller

Code

protected static function relationshipArityIsAffected(EntityReferenceFieldItemListInterface $old, EntityReferenceFieldItemListInterface $new) {
  $old_targets = static::toTargets($old);
  $new_targets = static::toTargets($new);
  $relationship_count_changed = count($old_targets) !== count($new_targets);
  $existing_relationships_updated = !empty(array_unique(array_intersect($old_targets, $new_targets)));
  return $relationship_count_changed && $existing_relationships_updated;
}