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- <?php
- namespace Drupal\Core\Field;
- use Drupal\Core\Entity\FieldableEntityInterface;
- use Drupal\Core\Form\FormStateInterface;
- /**
- * Defines a item list class for entity reference fields.
- */
- class EntityReferenceFieldItemList extends FieldItemList implements EntityReferenceFieldItemListInterface {
- /**
- * {@inheritdoc}
- */
- public function getConstraints() {
- $constraints = parent::getConstraints();
- $constraint_manager = $this->getTypedDataManager()->getValidationConstraintManager();
- $constraints[] = $constraint_manager->create('ValidReference', []);
- return $constraints;
- }
- /**
- * {@inheritdoc}
- */
- public function referencedEntities() {
- if (empty($this->list)) {
- return [];
- }
- // Collect the IDs of existing entities to load, and directly grab the
- // "autocreate" entities that are already populated in $item->entity.
- $target_entities = $ids = [];
- foreach ($this->list as $delta => $item) {
- if ($item->target_id !== NULL) {
- $ids[$delta] = $item->target_id;
- }
- elseif ($item->hasNewEntity()) {
- $target_entities[$delta] = $item->entity;
- }
- }
- // Load and add the existing entities.
- if ($ids) {
- $target_type = $this->getFieldDefinition()->getSetting('target_type');
- $entities = \Drupal::entityManager()->getStorage($target_type)->loadMultiple($ids);
- foreach ($ids as $delta => $target_id) {
- if (isset($entities[$target_id])) {
- $target_entities[$delta] = $entities[$target_id];
- }
- }
- // Ensure the returned array is ordered by deltas.
- ksort($target_entities);
- }
- return $target_entities;
- }
- /**
- * {@inheritdoc}
- */
- public static function processDefaultValue($default_value, FieldableEntityInterface $entity, FieldDefinitionInterface $definition) {
- $default_value = parent::processDefaultValue($default_value, $entity, $definition);
- if ($default_value) {
- // Convert UUIDs to numeric IDs.
- $uuids = [];
- foreach ($default_value as $delta => $properties) {
- if (isset($properties['target_uuid'])) {
- $uuids[$delta] = $properties['target_uuid'];
- }
- }
- if ($uuids) {
- $target_type = $definition->getSetting('target_type');
- $entity_ids = \Drupal::entityQuery($target_type)
- ->condition('uuid', $uuids, 'IN')
- ->execute();
- $entities = \Drupal::entityManager()
- ->getStorage($target_type)
- ->loadMultiple($entity_ids);
- $entity_uuids = [];
- foreach ($entities as $id => $entity) {
- $entity_uuids[$entity->uuid()] = $id;
- }
- foreach ($uuids as $delta => $uuid) {
- if (isset($entity_uuids[$uuid])) {
- $default_value[$delta]['target_id'] = $entity_uuids[$uuid];
- unset($default_value[$delta]['target_uuid']);
- }
- else {
- unset($default_value[$delta]);
- }
- }
- }
- // Ensure we return consecutive deltas, in case we removed unknown UUIDs.
- $default_value = array_values($default_value);
- }
- return $default_value;
- }
- /**
- * {@inheritdoc}
- */
- public function defaultValuesFormSubmit(array $element, array &$form, FormStateInterface $form_state) {
- $default_value = parent::defaultValuesFormSubmit($element, $form, $form_state);
- // Convert numeric IDs to UUIDs to ensure config deployability.
- $ids = [];
- foreach ($default_value as $delta => $properties) {
- if (isset($properties['entity']) && $properties['entity']->isNew()) {
- // This may be a newly created term.
- $properties['entity']->save();
- $default_value[$delta]['target_id'] = $properties['entity']->id();
- unset($default_value[$delta]['entity']);
- }
- $ids[] = $default_value[$delta]['target_id'];
- }
- $entities = \Drupal::entityManager()
- ->getStorage($this->getSetting('target_type'))
- ->loadMultiple($ids);
- foreach ($default_value as $delta => $properties) {
- unset($default_value[$delta]['target_id']);
- $default_value[$delta]['target_uuid'] = $entities[$properties['target_id']]->uuid();
- }
- return $default_value;
- }
- }
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