好的，我被卡住了，文档中没有关于这方面的信息（如果我错了，请纠正我）
示例：我在控制器中更新了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，以便如果更改"成功"，或者如果查询没有执行，如果有错误，我可以发送闪烁消息"未能对数据库进行更改"
这是我的代码示例，但我认为flush会返回void或null，所以这不是正确的方法，也许它会在失败时返回一些我不知道的异常。。
/**
* @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' => $form->createView()
));
}
你可以这样做：
...
if($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 $this->redirectToRoute('home', array(), 301);
}
...
然而，您不需要检查flush是否正常工作，如果出现问题，它会抛出异常。。
评论更新：
if($form->isValid()) {
try {
$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)
));
}
} catch (SOMEEXCEPTION $e) {
return $this->redirectToRoute('home', array(), 301);
}
}
更改
return $this->render('success/success.html.twig', array(
'test' => var_dump($pom)
));
if($pom) {
$this->addFlash(
'notice',
'You have successfully created post'
);
}
至
if($pom) {
$this->addFlash(
'notice',
'You have successfully created post'
);
}
return $this->render('success/success.html.twig', array(
'test' => var_dump($pom)
));
在返回响应