--- /dev/null
+<?php
+
+namespace Drupal\entity_reference_revisions\Normalizer;
+
+use Drupal\entity_reference_revisions\Plugin\Field\FieldType\EntityReferenceRevisionsItem;
+use Drupal\hal\Normalizer\EntityReferenceItemNormalizer;
+
+/**
+ * Defines a class for normalizing EntityReferenceRevisionItems.
+ */
+class EntityReferenceRevisionItemNormalizer extends EntityReferenceItemNormalizer {
+
+ /**
+ * The interface or class that this Normalizer supports.
+ *
+ * @var string
+ */
+ protected $supportedInterfaceOrClass = EntityReferenceRevisionsItem::class;
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function constructValue($data, $context) {
+ $value = parent::constructValue($data, $context);
+ if ($value) {
+ $value['target_revision_id'] = $data['target_revision_id'];
+ }
+ return $value;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function normalize($field_item, $format = NULL, array $context = array()) {
+ $data = parent::normalize($field_item, $format, $context);
+ $field_name = $field_item->getParent()->getName();
+ $entity = $field_item->getEntity();
+ $field_uri = $this->linkManager->getRelationUri($entity->getEntityTypeId(), $entity->bundle(), $field_name, $context);
+ $data['_embedded'][$field_uri][0]['target_revision_id'] = $field_item->target_revision_id;
+ return $data;
+ }
+
+}