[TYPO3-mvc] Cannot add objects from Controller, but from Backend

[freetime coder]

Hi,

I have been fighting with typo3 for weeks, mostly successful, but now I ran into something I have not been able to figure out. I am using version 6.1.5 and have created a rudimentary plugin base by using the Extension Builder. I created a map as aggregate root and a report m:n relation. Reports should mark spots on the map.

First I created test reports in the backend and added the records manually to the map, but now I wrote frontend templates for creating, editing and deleting them. While the backend solution works the frontend controller methods only create the reports but adding them to the map does not work.

So here is what I got:
MapController -> list, show
ReportController -> new, create, list, edit, delete

and here are the used methods:

ReportController;

public function newAction(\myPackage\myExt\Domain\Model\Map $map, \myPackage\myExt\Domain\Model\Report $newReport = NULL) {
	$this->view->assign('newReport', $newReport);
	$this->view->assign('map', $map);
}

public function createAction(\myPackage\myExt\Domain\Model\Report $newReport, \myPackage\myExt\Domain\Model\Map $map) {
	$this->reportRepository->add($newReport);
	$map->addReport($newReport);
	$this->redirect('update', 'Map', NULL, array('map' => $map));
}


MapController:

public function updateAction(\myPackage\myExt\Domain\Model\Map $map) {
	$this->mapRepository->update($map); //has to be done for persistence manager

	$this->redirect('show', 'Map', NULL, array('map' => $map));
}


Everything runs without error, but the map does not get the new report. I have read that redirect calls the persistenceManager's persistAll, but I also tried to call it directly, which does not make a difference.

Is there anything obvious I am missing?

greetings and thanks for any info,
freetimecoder