Nextras\Orm\Mapper\Dbal\RelationshipMapperOneHasMany::executeCounts PHP Метод

    protected function executeCounts(DbalCollection $collection, IEntity $parent)
    {
        $builder = $collection->getQueryBuilder();
        $preloadIterator = $parent->getPreloadContainer();
        $values = $preloadIterator ? $preloadIterator->getPreloadValues('id') : [$parent->getValue('id')];
        $cacheKey = $this->calculateCacheKey($builder, $values);
        $data =& $this->cacheCounts[$cacheKey];
        if ($data !== null) {
            return $data;
        }
        $data = $this->fetchCounts($builder, $values);
        return $data;
    }