Doctrine\ODM\MongoDB\Mapping\ClassMetadataFactory::setInheritedShardKey PHP Метод

    private function setInheritedShardKey(ClassMetadata $subClass, ClassMetadata $parentClass)
    {
        if ($parentClass->isSharded()) {
            $subClass->setShardKey($parentClass->shardKey['keys'], $parentClass->shardKey['options']);
        }
    }