調用未定義的方法getPosition（） - 爲什麼和修復

Question

我做了一個類Appointment與expertises屬性和另一個subExpertises同類型的extbase擴展。
這是他們看起來像在Appointment類（subExpertises是相同的）：

/** 
* 
* @param \Domain\Model\Appointment $appointment 
* @return void 
*/ 
public function bookAction(\Domain\Model\Appointment $appointment) { 

    //empty all expertises of appointment - then fill them with the selected from lawyer 
    $appointment->setExpertises(new \TYPO3\CMS\Extbase\Persistence\ObjectStorage()); 
    $appointment->setSubExpertises(new \TYPO3\CMS\Extbase\Persistence\ObjectStorage()); 

    //add all checked expertises of lawyer to appointment 
    foreach ($appointment->getLawyer()->getExpertises() as $expertise) { 
     if ($expertise->getChecked()) { 
      $appointment->addExpertise($expertise); 
     } 
     foreach ($expertise->getSubExpertises() as $subExpertise) { 
      if ($subExpertise->getChecked()) { 
       $appointment->addSubExpertise($subExpertise); 
      } 
     } 
    } 
    $this->appointmentRepository->update($appointment); 
} 

：

/** 
    * expertises 
    * 
    * @var \TYPO3\CMS\Extbase\Persistence\ObjectStorage<...\Domain\Model\Expertise> 
    */ 
    protected $expertises = NULL; 

    /** 
    * Adds an expertise 
    * 
    * @param ...\Domain\Model\Expertise $expertise 
    * @return void 
    */ 
    public function addExpertise(...\Domain\Model\Expertise $expertise) { 
     $this->expertises->attach($expertise); 
    } 

我流體的形式編輯後任命執行在我的控制器此代碼時得到一個錯誤

這是錯誤：

Fatal error: Call to undefined method \Domain\Model\Expertise::getPosition() in /var/www/typo3_src/typo3_src-6.2.25/typo3/sysext/extbase/Classes/Persistence/Generic/Backend.php on line 453

現在看來，TYPO3認爲Expertise是ObjectStorage型的，因爲它試圖調用getPosition()，但我不知道爲什麼它這是否和我應該爲了成功地挽救我Appointment對象與新Expertises改變。

我試着調試約會對象，但我找不到問題 - 對我來說似乎沒關係，它只是表明expertises和subExpertises已被修改。

Answer 1

Extbase中的Getter方法並不神奇，您必須明確定義它們。

如果您正在處理n：n關係，則還需要在模型中將屬性初始化爲ObjectStorage並在TCA中對其進行配置。

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