function entity_extract_ids

Extracts ID, revision ID, and bundle name from an entity.

Parameters

$entity_type: The entity type; e.g. 'node' or 'user'.

$entity: The entity from which to extract values.

Return value

A numerically indexed array (not a hash table) containing these: elements:

• 0: Primary ID of the entity.
• 1: Revision ID of the entity, or NULL if $entity_type is not versioned.
• 2: Bundle name of the entity.

File

core/modules/entity/entity.module, line 444

Entity API for handling entities like nodes or users.

Code

function entity_extract_ids($entity_type, $entity) {
  $info = entity_get_info($entity_type);

  // Objects being created might not have id/vid yet.
  if (!empty($info['entity keys'])) {
    $id = isset($entity->{$info['entity keys']['id']}) ? $entity->{$info['entity keys']['id']} : NULL;
    $vid = ($info['entity keys']['revision'] && isset($entity->{$info['entity keys']['revision']})) ? $entity->{$info['entity keys']['revision']} : NULL;
  }
  else {
    $id = NULL;
    $vid = NULL;
  }

  if (!empty($info['entity keys']['bundle'])) {
    // Explicitly fail for malformed entities missing the bundle property.
    if (!isset($entity->{$info['entity keys']['bundle']}) || $entity->{$info['entity keys']['bundle']} === '') {
      throw new EntityMalformedException(t('Missing bundle property on entity of type @entity_type.', array('@entity_type' => $entity_type)));
    }
    $bundle = $entity->{$info['entity keys']['bundle']};
  }
  else {
    // The entity type provides no bundle key: assume a single bundle, named
    // after the entity type.
    $bundle = $entity_type;
  }

  return array($id, $vid, $bundle);
}