doctrine / orm

     */

    private function toIdentifierArray(ClassMetadata $metadata, $identifier)

    {

        if (is_object($identifier) && $this->em->getMetadataFactory()->hasMetadataFor(ClassUtils::getClass($identifier))) {

            $identifier = $this->uow->getSingleIdentifierValue($identifier);

            if ($identifier === null) {

                throw ORMInvalidArgumentException::invalidIdentifierBindingEntity();

            }

        }

        return [$metadata->identifier[0] => $identifier];

    }

        }

        foreach ($id as $i => $value) {

            if (is_object($value) && $this->metadataFactory->hasMetadataFor(ClassUtils::getClass($value))) {

                $id[$i] = $this->unitOfWork->getSingleIdentifierValue($value);

                if ($id[$i] === null) {

                    throw ORMInvalidArgumentException::invalidIdentifierBindingEntity();

                }

            }

        }

        $sortedId = [];