如何在提交后清除值字段symfony表单

Question

我想在提交后清理Symfony表单的值字段，但我不知道如何做到。

表单文件

<?php
namespace AppForm;
use AppEntityComment;
use SymfonyComponentFormAbstractType;
use SymfonyComponentFormFormBuilderInterface;
use SymfonyComponentOptionsResolverOptionsResolver;
use SymfonyComponentFormExtensionCoreTypeHiddenType;
use SymfonyComponentFormExtensionCoreTypeTextareaType;
use SymfonyComponentFormExtensionCoreTypeSubmitType;
class CommentType extends AbstractType
{
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('text',TextareaType::class)
->add('visible',HiddenType::class)
->add('user',HiddenType::class)
->add('recipe',HiddenType::class)
->add('save', SubmitType::class, [
'label' => "Comentar",
'attr' => ['class' => 'save'],
]);
;
}
public function configureOptions(OptionsResolver $resolver)
{
$resolver->setDefaults([
'data_class' => Comment::class,
]);
}
}

控制器文件

/**
* @Route("/receta/{title}", name="recipe_show", methods={"GET"})
* @Route("/receta/{title}", name="recipe_show")
*/
public function show(Recipe $recipe,RecipeRepository $recipeRepository,CommentRepository $commentRepository, Request $request): Response
{ 
$comment = new Comment();
$comment_form = $this->createForm(CommentType::class, $comment);
$comment_form->handleRequest($request);
if ($comment_form->isSubmitted() && $comment_form->isValid()) {
$comment->setVisible(0);
$user = $this->getUser();
$comment->setUser($user);
$comment->setRecipe($recipe);
$entityManager = $this->getDoctrine()->getManager();
$entityManager->persist($comment);
$entityManager->flush();  
$this->addFlash('success', '¡Comentario registrado con exito! Tu comentario estará visible una vez que el administrador lo revise.');


}
$comments = $commentRepository->findCommentsByRecipe($recipe);

return $this->render('recipe/show/show.html.twig', [
'recipe' => $recipe,
'comment_form' => $comment_form->createView(),
'comments' => $comments
]);
}

具体来说，我需要在提交后清理文本字段，但我不知道如何做到。我也需要在提交之后显示一个addFlash。在这个过程中不能错过。我该如何解决？

Answer 1

正如@Cerad所建议的，您应该更仔细地阅读文档。Symfony文档维护良好，易于搜索：

https://symfony.com/doc/current/forms.html#processing-形成

如果你的控制器扩展了Symfony的AbstractController，你可以使用快捷方式：

if ($comment_form->isSubmitted() && $comment_form->isValid()) {
// ... your form submission logic here
$this->addFlash('success', '¡Comentario registrado con exito! Tu comentario estará visible una vez que el administrador lo revise.');

// Add this line, it will redirect to the same page, without the post data:
return $this->redirectToRoute('recipe_show', ['title' => 'sometitle']);
}