Extbase：存储库中的 PersistanceManager 为 NULL

Question

我正在为 TYPO3 8 构建一个扩展，也许我不太了解注入机制，但这是我的情况：

我写了一个服务 class 来查询 API。
所述服务还从本地存储库获取一些信息：

class ApiService {
    protected $myRepository

    public function __construct() {
        $objectManager = GeneralUtility::makeInstance('TYPO3\CMS\Extbase\Object\ObjectManager');
        $this->myRepository = GeneralUtility::makeInstance(MyRepository::class, $objectManager);
        var_dump($this->myRepository->persistanceManager); # outputs NULL
    }

    public function callerFunction() {
        var_dump($this->myRepository->persistenceManager); # outputs NULL
        myRepository->someRepositoryFunction();
    }
}

这会调用 myRepository->someRepositoryFunction():

class MyRepository extends \TYPO3\CMS\Extbase\Persistence\Repository {
     public function someRepositoryFunction() {
         var_dump($this->persistenceManager); # outputs a valid singleton PersistenceManager
         $data = $this->findAll(); # succeeds
     }
}

此代码在前端控制器中使用时有效。

class MyController extends \TYPO3\CMS\Extbase\Mvc\Controller\ActionController {
    /**
     * @var MyRepository
     * @inject
     */
    protected $myRepository = null;

    public function listAction() {
        myRepository->someRepositoryFunction();
    }
}

第一个 var_dump 以某种方式输出 NULL，而第二个 var_dump 神奇地输出了一个有效的单例。
print_r-Repository::__construct() 和 Repository::injectPersistenceManager() 中的语句似乎没有被调用。因此，我突然无法解释 PersistenceManager 的来源。

简化的堆栈跟踪：

#0 MyExtension\Domain\Repository\MyRepository->someRepositoryFunction() called at [myExtension/Classes/Service/ApiService.php]
#1 MyExtension\Service\ApiService->callerFunction() called at [myExtension/Classes/Domain/Repository/AnotherRepository.php]
#2 MyExtension\Domain\Repository\AnotherRepository->someOtherRepositoryFunction() called at [myExtension/Classes/Controller/MyController.php]
#3 MyExtension\Controller\MyController->listAction()

因为代码有效，所以这不是什么大问题。但是，如果我从 Task class 调用相同的代码，PersistenceManager stays NULL.

class MyTask extends AbstractTask
{

    protected $apiService = null;

    public function execute()
    {
        $this->apiService = GeneralUtility::makeInstance(ApiService::class);

        $data = $this->apiService->callerFunction();

        return true;
    }
}

再次简化 Stacktrace：

#0 MyExtension\Domain\Repository\MyRepository->someRepositoryFunction() called at [myExtension/Classes/Service/ApiService.php]
#1 MyExtension\Service\ApiService->callerFunction() called at [myExtension/Classes/Task/MyTask.php]
#2 MyExtension\Task\MyTask->execute() called at [typo3/sysext/scheduler/Classes/Scheduler.php]
#3 TYPO3\CMS\Scheduler\Scheduler->executeTask() called at [typo3/sysext/scheduler/Classes/Controller/SchedulerModuleController.php]

现在抛出 Call to a member function createQueryForType() on null 因为 MyRepository 的 PersistenceManager 是 NULL.

请注意，在这两种情况下，MyRepository 都是由 ApiService 实例化的！那么如果我从控制器或任务中调用它有什么区别呢？ ApiService::__construct 在这两种情况下都会被调用。（尽管 MyRepository 的实例此时仍为 NULL。）

为什么突然出现PersistenceManager？

Answer 1

而不是：

$objectManager = GeneralUtility::makeInstance('TYPO3\CMS\Extbase\Object\ObjectManager');
$this->myRepository = GeneralUtility::makeInstance(MyRepository::class, $objectManager);

试试这个：

$objectManager = GeneralUtility::makeInstance('TYPO3\CMS\Extbase\Object\ObjectManager');
$this->myRepository = $objectManager->get(MyRepository::class);

objectManager 解决了所有的依赖注入。

Extbase：存储库中的 PersistanceManager 为 NULL

Extbase: PersistanceManager in Repository is NULL

typo3

extbase

typo3-extensions

typo3-8.x