private function CerHandler::getReferenceIDs in Corresponding Entity References 7.2

Gets all the referenced entity IDs from a specific field on $entity.

Parameters

object $entity: The entity to scan for references.

array $field: Field or instance definition.

Return value

array Array of unique IDs, empty if there are no references or the field does not exist on $entity.

3 calls to CerHandler::getReferenceIDs()

CerHandler::getLocalReferenceIDs in ./handler.inc

Gets the IDs of the entities referenced by the local entity.

CerHandler::getRemoteReferenceIDs in ./handler.inc

Gets the IDs of the entities referenced by $entity.

CerHandler::update in ./handler.inc

Implements CerHandlerInterface::update().

File

./handler.inc, line 445

Contains base code for CER handlers, which are objects responsible for creating, updating and deleting corresponding references between entities.

Class

CerHandler

@class Generic CER handler with rudimentary language handling.

Code

private function getReferenceIDs($entity, $field) {
  $IDs = array();
  if (isset($entity->{$field['field_name']})) {
    foreach ($entity->{$field['field_name']} as $references) {
      foreach ($references as $reference) {
        $IDs[] = $reference['target_id'];
      }
    }
  }
  return array_unique(array_filter($IDs));
}