Question

好的我卡住了，没有关于此的文档信息（如果我错了，请纠正我）

示例：我在控制器中有更新metod，某种形式，如果forim有效，我使用flush方法进行更改。我如何检查是否在数据库中进行了更改，以便我可以发送Flash消息，如果更改已成功“成功”或如果有错误则执行查询我发送闪存消息“无法更改数据库”

这是我的代码的示例，但我认为flush返回void或null所以这不是要走的路，也许它会在失败时返回一些例外我不知道..

/**
 * @Route("createpost", name="createpost")
 */
public function createPostAction(Request $request) {
    if (!$this->get('security.authorization_checker')->isGranted('ROLE_ADMIN')) {
        throw $this->createAccessDeniedException();
    }
    $post = new Post();

    $form = $this->createForm(new PostForm(), $post);

    $form->handleRequest($request);

    if($form->isValid()) {
        $user = $this->getUser();
        $author = $user->getUsername();

        //$post->setPublishDate(new \DateTime);
        $post->setAuthor($author);

        $em = $this->getDoctrine()->getManager();
        $em->persist($post);
        $pom = $em->flush();
        return $this->render('success/success.html.twig', array(
           'test' => var_dump($pom)
        ));
        if($pom) {
            $this->addFlash(
                'notice',
                'You have successfully created post'
            );

        }
        return $this->redirectToRoute('home', array(), 301);
    }
    return $this->render(
        'create/post.html.twig', array(
           'form' => $form->createView()
        ));
}

Answer 1

你可以这样做：

String

但是，您不需要检查flush是否正常工作，如果出现问题则会抛出异常..

评论更新：

...
if($form->isValid()) {
    $user = $this->getUser();
    $author = $user->getUsername();

    //$post->setPublishDate(new \DateTime);
    $post->setAuthor($author);

    $em = $this->getDoctrine()->getManager();
    $em->persist($post);
    $em->flush();

    if(null != $post->getId()) {
        $this->addFlash(
            'notice',
            'You have successfully created post'
        );

        return $this->render('success/success.html.twig', array(
            'test' => var_dump($pom)
        ));

    }

    // This line never be called
    return $this->redirectToRoute('home', array(), 301);
}
...

Answer 2

更改

    return $this->render('success/success.html.twig', array(
       'test' => var_dump($pom)
    ));
    if($pom) {
        $this->addFlash(
            'notice',
            'You have successfully created post'
        );

    }

要

    if($pom) {
        $this->addFlash(
            'notice',
            'You have successfully created post'
        );

    }
    return $this->render('success/success.html.twig', array(
       'test' => var_dump($pom)
    ));

您需要在返回响应之前添加闪存

Symfony2返回flush metode的值

2 个答案: