public function initializeAction() {
 
	}
 
	public function indexAction() {                
                $productcategoryRepository = t3lib_div::makeInstance('tx_testext_Domain_Repository_ProductcategoryRepository');
		$productcategories = $productcategoryRepository->findAll();
 
                print_r($productcategories);
	}

class tx_testext_Domain_Repository_ProductcategoryRepository extends Tx_Extbase_Persistence_Repository { }

Tx_Extbase_Persistence_QueryResult Object ( [warning:Tx_Extbase_Persistence_QueryResult:private] => You should never see this warning. If you do, you probably used PHP array functions like current() on the Tx_Extbase_Persistence_QueryResult. To retrieve the first result, you can use the getFirst() method. [dataMapper:protected] => Tx_Extbase_Persistence_Mapper_DataMapper Object ( [identityMap:protected] => Tx_Extbase_Persistence_IdentityMap Object ( [objectMap:protected] => Tx_Extbase_Persistence_ObjectStorage Object ( [warning:Tx_Extbase_Persistence_ObjectStorage:private] => You should never see this warning. If you do, you probably used PHP array functions like current() on the Tx_Extbase_Persistence_ObjectStorage. To retrieve the first result, you can use the rewind() and current() methods. [storage:protected] => Array ( ) [isModified:protected] => ) [uuidMap:protected] => Array ( ) ) [reflectionService:protected] => Tx_Extbase_Reflection_Service Object ( [initialized:protected] => 1 [dataCache:protected] => t3lib_cache_frontend_VariableFrontend Object ( [useIgBinary:protected] => [identifier:protected] => cache_extbase_reflection [backend:protected] => t3lib_cache_backend_DbBackend Object ( [cacheTable:protected] => tx_extbase_cache_reflection [tagsTable:protected] => ...

#1: PHP Catchable Fatal Error: Object of class Tx_Extbase_Persistence_QueryResult could not be converted to string in ...

public function indexAction() {                
  $config = $this->configurationManager->getConfiguration(Tx_Extbase_Configuration_ConfigurationManagerInterface::CONFIGURATION_TYPE_FRAMEWORK);
  $productcategoryRepository = t3lib_div::makeInstance('Tx_JaReVoMCShop_Domain_Repository_ProductcategoryRepository');
  $productcategories = $productcategoryRepository->findAll();
  var_dump($productcategories);		     
  $this->view->assign('productcategories', $config['persistence']['storagePid']); // stimmt		
}

/**
 * A repository for Productcategories
 */
class tx_testext_Domain_Repository_ProductcategoryRepository extends Tx_Extbase_Persistence_Repository {
 
	public function findAll() {
            $query = $this->createQuery();
            return $query->execute();
	}
}