Question

用户可以拥有包含许多图片的相册，他可以删除图片或上传新图片。我希望这张专辑有1张或更多张图片，但永远不会为空（0）。因此，在用户删除图片之前，我希望能够检查图片的数量是否超过一个，如果小于一个，则显示一个flashbag消息，通知用户他的相册中不能有0张图片。< / p>

这就是我所做的：

/**
 * @Security("has_role('ROLE_USER')")
 */
public function avatarUserDeletedAction($id)
{
    $em = $this->getDoctrine()->getManager();
    $entity = $em->getRepository('ApplicationSonataUserBundle:Avatar')->find($id);

    if ($this->container->get('security.token_storage')->getToken()->getUser() != $entity->getUser() || !$entity)
        return $this->redirect($this->generateUrl('avatarUser'));

    $em->remove($entity);
    $em->flush();

    return $this->redirect($this->generateUrl('avatarUser'));
    //return $this->redirectToRoute('avatarUser');
}

ADD：

/**
 * @Security("has_role('ROLE_USER')")
 */
public function avatarUserDeletedAction(Request $request,$id)
{
    $em = $this->getDoctrine()->getManager();
    $entity = $em->getRepository('ApplicationSonataUserBundle:Avatar')->find($id);

    if ($entity == 1) {
        $request->getSession()
            ->getFlashBag()
            ->add('success', 'You cannot have less than 1 picture');
    } else{
        if ($this->container->get('security.token_storage')->getToken()->getUser() != $entity->getUser() || !$entity)
            return $this->redirect($this->generateUrl('avatarUser'));
        $em->remove($entity);
        $em->flush();
        }
    return $this->redirect($this->generateUrl('avatarUser'));
    //return $this->redirectToRoute('avatarUser');
}

我有以下错误：

注意：类Application \ Sonata \ UserBundle \ Entity \ Avatar的对象无法转换为int

Answer 1

您需要计算列表$entity中您实际为$entity创造条件的项目数量;

你的条件应该在int

上执行

$entityCount= count ($entity);

Answer 2

这个怎么样？

public function avatarUserDeletedAction($id)
{
    $em = $this->getDoctrine()->getManager();
    $entity = $em->getRepository('ApplicationSonataUserBundle:Avatar')->find($id);
    $qb = $em->createQueryBuilder();
    $qb->select('count(entity.id)');    
    $qb->from('ApplicationSonataUserBundle:Avatar','entity');

    $count = $qb->getQuery()->getSingleScalarResult();

    if ($this->container->get('security.token_storage')->getToken()->getUser() != $entity->getUser() || !$entity)
        return $this->redirect($this->generateUrl('avatarUser'));

    if($count >= 2) {
        $em->remove($entity);
        $em->flush();    
    }
    else {
        //generate error indicating user that can't have zero elements in the album 
    }

    return $this->redirect($this->generateUrl('avatarUser'));
    //return $this->redirectToRoute('avatarUser');
}

删除元素之前的条件[symfony2]

2 个答案: