TYPO3 Extbase Dependency Injection Error/Bug in v7? - typo3

Question

I am currently upgrading an extbase-extension to be TYPO3 v7 compatible,
and there is a very strange extbase behavior I simply have no clue to.
Within BackendController, A derived model has to be updated,
which looks like this:
/**
* action update
*
* #param \Vendor\MyExt\Domain\Model\Thing $thing
* #return void
*/
public function updateAction(\Vendor\MyExt\Domain\Model\Thing $thing) {
if ($this->request->hasArgument('exit')) {
$this->redirect('list');
exit;
}
$this->setFalItems($thing);
$this->updateStuff($thing);
$this->updateTypeModel($thing);
//...
}
protected function updateTypeModel( \Vendor\MyExt\Domain\Model\Thing $thing ) {
//...
$objectManager = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance('TYPO3\\CMS\\Extbase\\Object\\ObjectManager');
$mytypeRepository = $this->objectManager->get('Vendor\MyExt\Domain\Repository\TypeWhateverRepository');
$typeModel = $mytypeRepository->findByUid( $TypeId );
//...
in v6, vardump( $typemodel ) showed the corresponding Object,Vendor\MyExt\Domain\Model\TypeWhatever
in v7, vardump( $typemodel ) is showing the parent Object,Vendor\MyExt\Domain\Model\Thing
Why is it working in v6?
Why is the exact same code not working in v7 anymore?
[dreams of dreaded bugs at night]
I digged a little bit deeper, This problem is somehow related to Dependency Injection.:
/**
* typeWhateverRepository
*
* #var \Vendor\MyExt\Domain\Repository\TypeWhateverRepository
* #inject
*/
protected $typeWhateverRepository;
protected function updateTypeModel(\Vendor\MyExt\Domain\Model\Thing $thing) {
// $typeWhateverRepository = $this->objectManager->get('Vendor\\MyExt\\Domain\\Repository\\TypeWhateverRepository');
$typeModel = $this->typeWhateverRepository->findByUid($thing->getTypeId());
-> still the same problem,
-> Call to undefined method Vendor\MyExt\Domain\Model\Thing::setWhatever()
So, DI didn't work at all, Grmpf.
What other prerequisites are necessary to get the DI right?
(BTW, inbetween tests, i un-and reinstall the ext, clearing all caches via installtool.)
Thank you in advance.

Answer 1

First of all... lets do some clean up...
I would recommend to use the inject of your repository:
/**
* seminarRepository
*
* #var \Vendor\MyExt\Domain\Repository\TypeWhateverRepository
*/
protected $typeWhateverRepository;
/**
* #param \Vendor\MyExt\Domain\Repository\TypeWhateverRepository $typeWhateverRepository
*/
public function injectTypeWhateverRepository(TypeWhateverRepository $typeWhateverRepository)
{
$this->typeWhateverRepository= $typeWhateverRepository;
}
Then I would use an Relation from Thing to Type so you don't have to fetch these from your Repository:
/**
* #lazy
* #var \Vendor\MyExt\Domain\Model\TypeWhatever
*/
protected $typeWhatever = null;
/**
* #return \Vendor\MyExt\Domain\Model\TypeWhatever $typeWhatever
*/
public function getTypeWhatever()
{
return $this->typeWhatever;
}
/**
* #param \Vendor\MyExt\Domain\Model\TypeWhatever $typeWhatever
*
* #return void
*/
public function setTypeWhatever(TypeWhatever $typeWhatever)
{
$this->typeWhatever = $typeWhatever;
}
In your Thing TCA put than:
'type_whatever' => [
'exclude' => 0,
'label' => 'LLL:EXT:my_ext/Resources/Private/Language/locallang_db.xlf:tx_myext_domain_model_thing.type_whatever',
'config' => [
'type' => 'select',
'foreign_table' => 'tx_myext_domain_model_typewhatever',
'items' => [
['LLL:EXT:my_ext/Resources/Private/Language/locallang_db.xlf:tx_myext_domain_model_thing.choose', 0],
],
'minitems' => 1,
'maxitems' => 1,
],
],

Answer 2

The Solution to this is trivial, but was hard to find, since I was doing an Extension Update.
the extbase-typoscript setup was missing the subclasses definition m)
extbase setup is usually found in the filetypo3conf/ext/my_ext/Configuration/TypoScript/setup.txt:
config.tx_extbase.persistence.classes {
Vendor\MyExt\Domain\Model\Thing {
subclasses {
0 = Vendor\MyExt\Domain\Model\TypeWhatever
}
}
}
Also note that it is necessary for the class to have a proper 'extends' definition in the Model file.
I still wonder why it worked in v6 at all - but well, nevermind.