如何指定我的先例表格的物件？

在我的專案中，我想使用由我的先例形式創建的物件：

這是我的資料庫的架構：

我的測驗控制器

public function creation(Request $request){
        $quiz = new Quiz();
        $user = $this->getUser();

        $formQuiz = $this->createForm(QuizType::class, $quiz);

        $formQuiz->handleRequest($request);
  

        if ($formQuiz->isSubmitted() && $formQuiz->isValid() ) {
            $quiz->setCreatedAt(new DateTimeImmutable());
            $quiz->setCreatedBy($user);
            $entityManager = $this->getDoctrine()->getManager();
            $entityManager->persist($quiz);
            $entityManager->flush();

            return $this->redirectToRoute('creation_questions');
        }
        return $this->render('quiz/creation.html.twig', [
            'formQuiz' => $formQuiz->createView(),
        ]);
    }

還有我的 QuestionController 必須與測驗表格連接

public function creation_questions(Request $request){
        $quiz = ?
        $question = new Questions();

        $formQuestions = $this->createForm(QuestionType::class, $question);
        
        $formQuestions->handleRequest($request);

        if ($formQuestions->isSubmitted() && $formQuestions->isValid() ) {
            $question->setCreatedAt(new DateTimeImmutable());
            $question->setQuiz($quiz);
 
            $entityManager = $this->getDoctrine()->getManager();
            $entityManager->persist($question);
  
            $entityManager->flush();

            return $this->redirectToRoute('home');
        }
        return $this->render('questions/questions.html.twig', [
            'formQuestion' => $formQuestions->createView()
        ]);
    }

我必須寫什么來代替“？”？

uj5u.com熱心網友回復：

您沒有顯示您的路由，但您可以使用 SensioFrameworkExtraBundle 中的 paramConverte "magic" 并執行類似的操作。

/**
 * @Route("/some-route/{id}", name="some_route_name")
 */
public function creation_questions(Request $request, Quiz $quiz)
{
    $question = new Questions();

    $formQuestions = $this->createForm(QuestionType::class, $question);

    $formQuestions->handleRequest($request);

    if ($formQuestions->isSubmitted() && $formQuestions->isValid()) {
        $question->setCreatedAt(new DateTimeImmutable());
        $question->setQuiz($quiz);

        $entityManager = $this->getDoctrine()->getManager();
        $entityManager->persist($question);

        $entityManager->flush();

        return $this->redirectToRoute('home');
    }
    return $this->render('questions/questions.html.twig', [
        'formQuestion' => $formQuestions->createView()
    ]);
}

其中{id}部分/someRoute/{id}是測驗 ID。Symfony 應該自動獲取與該 ID 匹配的測驗。或者您可以更明確地說明引數轉換器應如何解釋這樣的值。更多資訊在這里https://symfony.com/bundles/SensioFrameworkExtraBundle/current/annotations/converters.html

或者，您可以傳遞測驗 id 并手動獲取測驗（不那么神奇，但完全合法）。

/**
 * @Route("/some-route/{id}", name="some_route_name")
 */
public function creation_questions(Request $request, int $id)
{
    $entityManager = $this->getDoctrine()->getManager();
    $quiz = $entityManager->getRepository(Quiz::class)->find($id);
    $question = new Questions();

    $formQuestions = $this->createForm(QuestionType::class, $question);

    $formQuestions->handleRequest($request);

    if ($formQuestions->isSubmitted() && $formQuestions->isValid()) {
        $question->setCreatedAt(new DateTimeImmutable());
        $question->setQuiz($quiz);

        $entityManager->persist($question);

        $entityManager->flush();

        return $this->redirectToRoute('home');
    }
    return $this->render('questions/questions.html.twig', [
        'formQuestion' => $formQuestions->createView()
    ]);
}

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