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

    protected function fetchByTwoPassStrategy(QueryBuilder $builder, array $values)
    {
        $builder = clone $builder;
        $targetPrimaryKey = $this->targetMapper->getStorageReflection()->getStoragePrimaryKey();
        $isComposite = count($targetPrimaryKey) !== 1;
        foreach (array_unique(array_merge($targetPrimaryKey, [$this->joinStorageKey])) as $key) {
            $builder->addSelect("[{$key}]");
        }
        $sqls = $args = [];
        foreach ($values as $primaryValue) {
            $builderPart = clone $builder;
            $builderPart->andWhere("%column = %any", $this->joinStorageKey, $primaryValue);
            $sqls[] = $builderPart->getQuerySQL();
            $args = array_merge($args, $builderPart->getQueryParameters());
        }
        $query = '(' . implode(') UNION ALL (', $sqls) . ')';
        $result = $this->connection->queryArgs($query, $args);
        $map = $ids = [];
        if ($isComposite) {
            foreach ($result as $row) {
                $id = [];
                foreach ($targetPrimaryKey as $key) {
                    $id[] = $row->{$key};
                }
                $ids[] = $id;
                $map[$row->{$this->joinStorageKey}][] = implode(',', $id);
            }
        } else {
            $targetPrimaryKey = $targetPrimaryKey[0];
            foreach ($result as $row) {
                $ids[] = $row->{$targetPrimaryKey};
                $map[$row->{$this->joinStorageKey}][] = $row->{$targetPrimaryKey};
            }
        }
        if (count($ids) === 0) {
            return new EntityIterator([]);
        }
        if ($isComposite) {
            $builder = $this->targetMapper->builder();
            $builder->andWhere('(%column[]) IN %any', $targetPrimaryKey, $ids);
            $entitiesResult = [];
            $collection = $this->targetMapper->toCollection($builder);
            foreach ($collection as $entity) {
                $entitiesResult[implode(',', $entity->getValue('id'))] = $entity;
            }
        } else {
            $entitiesResult = $this->targetRepository->findBy(['id' => $ids])->fetchPairs('id', null);
        }
        $entities = [];
        foreach ($map as $joiningStorageKey => $primaryValues) {
            foreach ($primaryValues as $primaryValue) {
                $entity = $entitiesResult[$primaryValue];
                $entities[$entity->getRawValue($this->metadata->relationship->property)][] = $entity;
            }
        }
        return new EntityIterator($entities);
    }