"Class does not exist. Reflection failed." with lazy loading and object storages

Question

I'm upgrading a website from TYPO3 8 to TYPO3 9

All the code was working well with TYPO3 8.
Now I have to adapt a lot as it came from even earlier TYPO3 (TCA, doctrine, ...) and throws some errors.

At the moment I have the problem for some pages I only get this error (in slight modifications):

(1/2) #1278450972 TYPO3\CMS\Extbase\Reflection\Exception\UnknownClassException

Class VendorName\VendorExtensionName\Domain\Model\TYPO3\CMS\Extbase\Persistence\ObjectStorage does not exist. Reflection failed.

I assume it is triggered by this code:

<?php
namespace VendorName\VendorExtensionName\Controller;
use TYPO3\CMS\Extbase\Annotation\Inject;

class AnsprechpartnerController extends \TYPO3\CMS\Extbase\Mvc\Controller\ActionController {

    /**
     * ansprechpartnerRepository
     *
     * @Inject
     * @var \VendorName\VendorExtensionName\Domain\Repository\AnsprechpartnerRepository
     */
    protected $ansprechpartnerRepository;

    [...]

    /**
     * action showDetail
     *
     * @return void
     */
    public function showDetailAction() {
        $pids = $this->settings['pids'];
        $this->settings['ansprechpartner'] = explode(',', $this->settings['ansprechpartner']);
        foreach ($this->settings['ansprechpartner'] as $uid) {
            $person = $this->ansprechpartnerRepository->findByUid($uid);  

    [...]

as this last line is in the debug stack.

The extension has 8 kinds of records which relate to each other. I assume because of this the relations are defined lazy and object storages are used.

<?php
namespace VendorName\VendorExtensionName\Domain\Model;
use TYPO3\CMS\Extbase\Annotation\ORM\Lazy;
/**
 *
 * @package vendor_extension_name
 *
 */
class Ansprechpartner extends \TYPO3\CMS\Extbase\DomainObject\AbstractEntity {

[...]


/**
 * Organisationseinheit
 *
 * @var \TYPO3\CMS\Extbase\Persistence\ObjectStorage<\VendorName\VendorExtensionName\Domain\Model\Organisation>
 * @Lazy
 */
protected $organisationseinheit;

/**
 * Dienstleistungen
 *
 * @var \TYPO3\CMS\Extbase\Persistence\ObjectStorage<\VendorName\VendorExtensionName\Domain\Model\AnsprechpartnerDienstleistung>
 * @Lazy
 */
protected $dienstleistungen = NULL;

[...]

But here the order of the mixed up classes is reversed.
Nonetheless this might be the reason for the mixing/concatenating of the existing namespaces VendorName\VendorExtensionName\Domain\Model[\Ansprechpartner] and
\TYPO3\CMS\Extbase\Persistence\ObjectStorage to the strange class name
VendorName\VendorExtensionName\Domain\Model\TYPO3\CMS\Extbase\Persistence\ObjectStorage, which of course does not exist.

Edit:
insert the usage of
use TYPO3\CMS\Extbase\Annotation\Inject; and
use TYPO3\CMS\Extbase\Annotation\ORM\Lazy; instead of build in inject and lazy, which has no effect.

Edit 2:

Initialization of storages (example from the class above):

class Ansprechpartner extends \TYPO3\CMS\Extbase\DomainObject\AbstractEntity
{

    :
    /**
     * __construct
     *
     * @return Ansprechpartner
     */
    public function __construct() {
        $this->initStorageObjects();
    }

    /**
     * Initializes all ObjectStorage properties.
     *
     * @return void
     */
    protected function initStorageObjects() {
        $this->organisationseinheit = new \TYPO3\CMS\Extbase\Persistence\ObjectStorage();
        $this->dienstleistungen = new \TYPO3\CMS\Extbase\Persistence\ObjectStorage();
    }
    :

Do you have a stack trace? Do you instantiate ObjectStorage in your constructor or another initialization method? If so, did you prefix the class path with a backslash? — Jonas Osburg
my current stacktrace is 88 levels deep, 1242 lines. As I meanwhile inserted a lot of trace-code the line numbers no longer match the original code. I also commented some trys to get the origin of the fail. The storages are initialized like added to the question. — Bernd Wilke πφ

Thomas Löffler Thomas Löffler · Accepted Answer · 2019-05-15T14:12:12

In version 9.0 the annotation @lazy was replaced with @TYPO3\CMS\Extbase\Annotation\ORM\Lazy.

Maybe this can help: https://docs.typo3.org/typo3cms/extensions/core/latest/Changelog/9.0/Feature-83078-ReplaceLazyWithTYPO3CMSExtbaseAnnotationORMLazy.html

"Class does not exist. Reflection failed." with lazy loading and object storages

3 Answers