如何在不覆盖$exercise参数的情况下传输它

Question

这是找到具有特定lessonid的第一个练习的函数

public function exerciseAction($lessonid, $exercise)
{
$em = $this->getDoctrine()->getEntityManager();
$exercise = $em->getRepository('PrezentariPrezentariBundle:Exercise')->findOneByLesson($lessonid);
return $this->render('PrezentariPrezentariBundle:Page:exercise.html.twig', array(
        'exercise' => $exercise,
        'lessonid' => $lessonid,
    ));
}

在这里，我尝试实现一个函数来逐个练习

public function exercisePagerAction($exercise)
{
    $em = $this->getDoctrine()->getEntityManager();
    $nextExercise= $em->getRepository('PrezentariPrezentariBundle:Exercise')->getNext($exercise);
    return $this->render('PrezentariPrezentariBundle:Page:exercise.html.twig', array(
        'exercise' => $nextExercise,
    ));
}

Answer 1

你的问题在这里：

$nextExercise= $em->getRepository('PrezentariPrezentariBundle:Exercise')->getNext($exercise);

你需要找到sth。

$nextExercise= $em->getRepository('PrezentariPrezentariBundle:Exercise')->findOneById($exercise)->getNext();