[TYPO3-mvc] Re: Create predefined fe_groups when activating extension

[NGUYEN Duc Quan]

Hi again,

I tried to add the following code to my ext_localconf.php file:

// Create default frontend group
// create new objectManager to instantiate FrontendUserGroupRepository and FrontendUserGroup
$objectManager = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance('TYPO3\CMS\Extbase\Object\ObjectManager');

// reference to FrontendUserGroupRepository to handle frontend user groups
$userGroupRepository = $objectManager->get('TYPO3\\CMS\\Extbase\\Domain\\Repository\\FrontendUserGroupRepository');

// create new frontend user group
$newFeGroup = $objectManager->create('\\TYPO3\\CMS\\Extbase\\Domain\\Model\\FrontendUserGroup');
$newFeGroup->setTitle('myNewGroup');
$userGroupRepository->frontendUserGroupRepository->add($newFeGroup);

try {
	$objectManager->objectManager
			->get('TYPO3\\CMS\\Extbase\\Persistence\\Generic\\PersistenceManager')
			->persistAll();
} catch (Exception $e) {
	echo 'Caught exception while adding group: ',  $e->getMessage(), "\n";
}

which leads to a fatal error:

( ! ) Fatal error: Call to a member function exec_SELECTgetSingleRow() on null in /home/vagrant/Projects/typo3_src-7.6.0/typo3/sysext/core/Classes/Cache/Backend/Typo3DatabaseBackend.php on line 174

Maybe this is the wrong approach to dynamically create a group when activating the plugin?