Cannot inject foreign repository into my controller

I’ve got a problem concerning a plugin I’m writing for Typo3. I want to have access to a repository (and the content of that) of a plugin in a different plugin. Like importing the stuff from one plugin to another. What I tried was using @inject in my controller, but the result is null.

    /**
     * @var SebklnAjaxselectlistDomainRepositoryOptionRecordRepository
     */
    protected $optionRecordRepository = null;

    /**
     * @param SebklnAjaxselectlistDomainRepositoryOptionRecordRepository
     */
    public function injectOptionRecordRepository(SebklnAjaxselectlistDomainRepositoryOptionRecordRepository $optionRecordRepository) {
        $this->optionRecordRepository = $optionRecordRepository;
    }

And my action function:

$standorts = $this->optionRecordRepository->findAll();
$this->view->assign('standorts', $standorts);

My Typo3 version is 9.5, so may one got an idea what I should do. Thanks in advance.

Answer

You have to set the storagePid where the records are stored.

plugin.tx_[lowercasedextensionname] {
  persistence {
    storagePid = 12,22
  }
}

Or ignore it in repository if records are stored at unknown places.

/**
  * Initializes the repository.
  */
public function initializeObject()
{
    /** @var TYPO3CMSExtbasePersistenceGenericQuerySettingsInterface $querySettings */
    $querySettings = $this->objectManager->get(QuerySettingsInterface::class);
    $querySettings->setRespectStoragePage(false);
    $this->setDefaultQuerySettings($querySettings);
}