TYPO3 Repository outside controller - typo3-extensions

Question

I am using TYPO3 10.4.15 and try to write a TcaProcFunc for my own extension.
namespace HGA\Album\UserFunc;
use TYPO3\CMS\Core\Utility\ExtensionManagementUtility;
use TYPO3\CMS\Core\Utility\GeneralUtility;
use TYPO3\CMS\Extbase\Object\ObjectManager;
use HGA\Album\Domain\Repository\AlbumRepository;
use HGA\Album\Domain\Model\Album;
use TYPO3\CMS\Extbase\Persistence\PersistenceManagerInterface;
class TcaProcFunc
{
/**
* #param array $config
*
*/
public function getLink(&$config)
{
$ret = [];
$objectManager = GeneralUtility::makeInstance(ObjectManager::class);
$albumRepository= $objectManager->get(AlbumRepository::class);
$albums = $albumRepository->findAll();
foreach ($albums as $album){
$ret[] = ["Test1","Test1"];
}
$i = count($albums);
error_log("Album: " . $i, 0 );
$ret[] = ["Test", "Test"];
$config['items'] = $ret;
// error_log("UserFunc: " . var_export($config, true), 0);
}
}
The problem is, that findall() does not provide any result. $albumsis empty, but there is one record inside the database.
HGA is my vendor name and Album the extension name. The TcaProcFunc is in generell is working, but I don't have any access to the extension database.
Can anybody tell me, what is wrong with my code or how I what I can do to findthe problem?
Thank you in advance.

Answer 1

Finally I did it with ConnectionPool
namespace HGA\Album\UserFunc;
use TYPO3\CMS\Core\Utility\GeneralUtility;
use TYPO3\CMS\Extbase\Object\ObjectManager;
use TYPO3\CMS\Core\Database\ConnectionPool;
class TcaProcFunc
{
/**
* #param array $config
*
*/
public function getLink(&$config)
{
$ret = [];
$albums = GeneralUtility::makeInstance(ConnectionPool::class)
->getConnectionForTable('tx_album_domain_model_album')
->select(
['uid', 'album_artist', 'album'],
'tx_album_domain_model_album',
[]
)->fetchAll();
foreach ($albums as $album){
$ret[] = [$album['album_artist'] . ": " . $album['album'], $album['uid']];
}
$config['items'] = $ret;
}
}