Query an entity in a different Language - typo3

Question

I'm trying to query entietes in a language, other than the system default one, my repository method looks like this,
public function findOneByMaterialnumber( $materialnumber, $sysLanguageUid ){
$query = $this->createQuery();
$query->matching($query->like('materialnumber',$materialnumber));
$query->getQuerySettings()->setIgnoreEnableFields(true);
$query->getQuerySettings()->setRespectStoragePage(false);
$query->getQuerySettings()->setLanguageUid($sysLanguageUid);
//$query->getQuerySettings()->setRespectSysLanguage(false);
//$query->getQuerySettings()->setLanguageMode('strict');
//$query->getQuerySettings()->setLanguageOverlayMode(false);
$parser = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance('TYPO3\\CMS\\Extbase\\Persistence\\Generic\\Storage\\Typo3DbQueryParser');
$queryParts = $parser->parseQuery($query);
//\TYPO3\CMS\Core\Utility\DebugUtility::debug($queryParts, 'Query');
print_r($queryParts);
exit;
return $query->execute()->getFirst();
}
but the query this results in still incorporates the sys_language_uid in the non-strict way. The debugged query object looks like this.
[keywords] => Array
(
)
[tables] => Array
(
[tx_productfinder_domain_model_product] => tx_productfinder_domain_model_product
)
[unions] => Array
(
)
[fields] => Array
(
[tx_productfinder_domain_model_product] => tx_productfinder_domain_model_product.*
)
[where] => Array
(
[0] => tx_productfinder_domain_model_product.materialnumber LIKE :
)
[additionalWhereClause] => Array
(
[0] => (tx_productfinder_domain_model_product.sys_language_uid IN (0,-1))
)
[orderings] => Array
(
[0] => tx_productfinder_domain_model_product.ordercode ASC
[1] => tx_productfinder_domain_model_product.title ASC
[2] => tx_productfinder_domain_model_product.materialnumber ASC
)
[limit] =>
[offset] =>
[tableAliasMap] => Array
(
[tx_productfinder_domain_model_product] => tx_productfinder_domain_model_product
)
This happens regardless of the sys_language_uid i query for. What am I doing wrong?
As you can see, I've tried combinations of all sorts of QuerySettings, setRespectSysLanguage, setLanguageMode and setLanguageOverlayMode. As I understand it, I have to query strictly and without language overlay. But none of those, nor their combinations, worked as intended.

Answer 1

This works with TYPO3 8.7.xx
use TYPO3\CMS\Core\Database\ConnectionPool;
use TYPO3\CMS\Core\Utility\GeneralUtility;
use TYPO3\CMS\Extbase\Persistence\Generic\Mapper\DataMapper;
/**
* The repository for Products
*/
class ProductRepository extends \TYPO3\CMS\Extbase\Persistence\Repository
{
/*
* #param int $uid id of record
* #param int $langUid sys_language_uid of the record
* #return \ITSHofmann\ItsProductfile\Domain\Mpdell\Product
*/
public function findByUidAndLanguageUid($uid,$langUid)
{
$query = $this->createQuery();
$object = $query->matching(
$query->equals('uid', $uid)
)->execute()->getFirst();
if ($object) {
$className = get_class ($object);
$dataMapper = $this->objectManager->get(DataMapper::class);
$tableName = $dataMapper->getDataMap($className)->getTableName();
$transOrigPointerField = $GLOBALS['TCA'][$tableName]['ctrl']['transOrigPointerField'];
$languageField = $GLOBALS['TCA'][$tableName]['ctrl']['languageField'];
$connection = GeneralUtility::makeInstance(ConnectionPool::class);
$queryBuilder = $connection->getQueryBuilderForTable($tableName );
$statement = $queryBuilder->select('*')
->from($tableName )
->where(
$queryBuilder->expr()->eq(
$transOrigPointerField,$queryBuilder->createNamedParameter($object->getUid(), \PDO::PARAM_INT)),
$queryBuilder->expr()->eq(
$languageField,$queryBuilder->createNamedParameter($langUid, \PDO::PARAM_INT))
)->execute();
$objectRow = $statement ->fetch();
if ($objectRow) {
$langObject = $dataMapper->map($className,[$objectRow]);
if ($langObject ) {
return reset ($langObject );
}
}
}
return $object;
}
}

Answer 2

edit. The answer I posted here originally turned out not to work either. What I ended up doing instead, was to write a custom statement, execute it to return the raw data and map it, via DataMapper->map(); Refer to Christop Hofmanns answer for details.