使用学说和 symfony 从 $form 对象中检索 POST

Question

我的问题
表单请求/POST 中的这两行有什么区别？

• $article->getComments() as $comment
• $form->get('Comments')->getData() as $comment

上下文

实体文章

 class Article
 {
     private Comments
     public function __construct() {
       $this->Comments = new\Doctrine\Common\Collections\ArrayCollection()
     }
     public function getComments() 
     {
           return $this->comments
     }

表单请求

$article 是一个带有一些 cmets 的对象。

$form = $this->createForm(new ArticleType(), $article);
$request = $this->getRequest();
if($request->getMethode() == 'POST'){
    $form->bind($request);
    if($form->isValid()) {
       $liste_comments = array();
       $liste_comments_bis = array();
       foreach($article->getComments() as $comment){
           $liste_comments[] = $comment
       }
       foreach($form->get('comments')->getData() as $comment_bis){
           $liste_comments_bis[] = $comment_bis
       }
    }
}

文章类型 添加文章内容并添加cmets集合

Answer 1

在$form->bind($request) 所做的所有工作的深处，Symfony 的表单系统从 HTTP 请求中读取所有数据并将其分配给表单的底层数据对象。因此，当您运行 $form->getData() 时，它会返回表单的默认值与请求中的值合并。

让我们来看看吧

// Create a form object based on the ArticleType with default data of $article
$form = $this->createForm(new ArticleType(), $article);

// Walk over data in the requests and bind values to properties of the
// underlying data. Note: they are NOT bound to $article - $article just
// provides the defaults/initial state
$form->bind($request);

// Get the Article entity with bound form data
$updatedArticle = $form->getData();

// This loops over the default comments
foreach ($article->getComments() as $comment) {}

// This loops over the submitted comments
foreach ($updatedArticle ->getComments() as $comment) {}

// For the purpose of my example, these two lines return the same thing
$form->get('comments')->getData();
$form->getData()->getComments();

这有帮助吗？