/** * Returns the identifier assigned to the given entity. * * {@inheritDoc} * * @throws \Doctrine\ORM\ORMException */ public function generate(EntityManager $em, $entity) { $class = $em->getClassMetadata(get_class($entity)); $idFields = $class->getIdentifierFieldNames(); $identifier = array(); foreach ($idFields as $idField) { $value = $class->getFieldValue($entity, $idField); if (!isset($value)) { throw ORMException::entityMissingAssignedIdForField($entity, $idField); } if (isset($class->associationMappings[$idField])) { // NOTE: Single Columns as associated identifiers only allowed - this constraint it is enforced. $value = $em->getUnitOfWork()->getSingleIdentifierValue($value); } $identifier[$idField] = $value; } return $identifier; }