[TYPO3-mvc] Relation-Field of existing objects not updated

[Joerg Schoppet]

Hi,

I have the following object-"structure".

Invoice
  - number
  - manuals
  - imports

Manual
  - name
  - price
  - invoice

Import
  - name
  - price
  - importedFrom
  - invoice


Positions (manual and import) can be created without an invoice. Problem 
is, that when I create a new invoice and assign e.g. three Imports, then 
the field "imports" is correctly updated with "3", but the "invoice" 
fields of the Imports are not updated.

Here is the code of the action:
         $invoice = 
t3lib_div::makeInstance('Tx_JrCustomer_Domain_Model_Invoice');
         $invoiceNumber = $this->calculateNumber(
             (int)date('j'),
             (int)date('n'),
             (int)date('Y')
         );
         $invoice->setNumber($invoiceNumber);

         if (isset($manuals)) {

             foreach ($manuals as $manualUid) {
                 $manual = 
$this->manualRepository->findOneByUid($manualUid);
                 $invoice->addManual($manual);
             }

         }

         if (isset($imports)) {

             foreach ($imports as $importUid) {
                 $import = 
$this->importRepository->findOneByUid($importUid);
                 $invoice->addImport($import);
             }

         }


Have I missed something?


Joerg