/** * Saves an entity revision. * * @param \Drupal\Core\Entity\ContentEntityInterface $entity * The entity object. * * @return int * The revision id. */ protected function saveRevision(ContentEntityInterface $entity) { $record = $this->mapToStorageRecord($entity->getUntranslated(), $this->revisionTable); $entity->preSaveRevision($this, $record); if ($entity->isNewRevision()) { $insert_id = $this->database->insert($this->revisionTable, array('return' => Database::RETURN_INSERT_ID))->fields((array) $record)->execute(); // Even if this is a new revision, the revision ID key might have been // set in which case we should not override the provided revision ID. if (!isset($record->{$this->revisionKey})) { $record->{$this->revisionKey} = $insert_id; } if ($entity->isDefaultRevision()) { $this->database->update($this->entityType->getBaseTable())->fields(array($this->revisionKey => $record->{$this->revisionKey}))->condition($this->idKey, $record->{$this->idKey})->execute(); } } else { $this->database->update($this->revisionTable)->fields((array) $record)->condition($this->revisionKey, $record->{$this->revisionKey})->execute(); } // Make sure to update the new revision key for the entity. $entity->{$this->revisionKey}->value = $record->{$this->revisionKey}; return $record->{$this->revisionKey}; }