我使用symfony 2.8,我在用户和博客(一个用户多个博客)之间创建了一对多关系。此外,我还创建了博客和评论之间的一对多关系。同样,用户和评论之间也有一对多的关系。现在我的评语表看起来像这样Symfony在用户和博客上保存博客评论
评语表
id Primary int(11)
user_id Primary int(11)
blog_id Primary int(11)
comment varchar(2000)
created_at datetime
评论实体
博客实体
用户实体
博客控制器 - >的showAction方法
/**
* @Route("/blog/show/{id}", name="blog_show")
*/
public function showAction(Request $request,$id)
{
$blog = $this->getDoctrine()->getRepository(Blog::class)->findOneById($id);
$comment = new Comment();
$form = $this->createForm(CommentType::class, $comment);
$form->handleRequest($request);
if ($form->isSubmitted() && $form->isValid()) {
$user = new User();
$blog = new Blog();
$comment->setUser($this->getUser());
$comment->setBlog($blog);
$em = $this->getDoctrine()->getManager();
$em->persist($comment);
$em->flush();
return $this->redirect($this->generateUrl('blog_show', array('id' => $id)), 301);
}
return $this->render('Blog/show.html.twig', array('blog'=> $blog,'form' => $form->createView()));
}
现在,当我提出从博客显示页面的评论形式,它显示了我这个错误
"A new entity was found through the relationship 'AppBundle\Entity\Comment#blog' that was not configured to cascade persist operations for entity: AppBundle\Entity\[email protected] To solve this issue: Either explicitly call EntityManager#persist() on this unknown entity or configure cascade persist this association in the mapping for example @ManyToOne(..,cascade={"persist"}). If you cannot find out which entity causes the problem implement 'AppBundle\Entity\Blog#__toString()' to get a clue."
我在这里错过了什么。任何帮助深表感谢。由于
它告诉你在类中没有叫做getBlog的函数。真的吗? –
如果您检查我的评论实体,则有一个函数定义了getBlog()。但它仍然显示错误。 – Aamir
但是这在'Comment'实体中。当你调用'$ this-> getBlog();'它正在'BlogController'本身寻找这个函数。你需要从表单中获取它吗? –