错误搜索表单（变量“form”不存在。）symfony

Question

我想用 symfony 创建一个搜索表单 我首先创建一个表单（Form/SearchType.php） 然后在控制器中渲染它（SearchController.php） 然后将渲染发送给查看器以显示表单 （部分/Header.html.twig） 但我收到此错误：变量“form”不存在。 预先感谢

Header.html.twig：

<header class="hero-header">
    <h1 class="hero-title">
        Désigner.<br>Coder.<br>Assembler.
    </h1>
    <p class="hero-subtitle">
        DevPlanTech : Où Passion et Technologie Se Rencontrent - Explorez les Dernières Tendances, Trouvez les Meilleurs Bons Plans, et Maîtrisez l'Art du Dev et du Design
    </p>
    <div class="search-box">
        {{ form_start(form) }}
        {{ form_widget(form) }}
        {{ form_end(form) }}
    </div>
</header>

表单/SearchType.php：

<?php
namespace App\Form;

use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\Extension\Core\Type\SearchType as FormSearchType;
use Symfony\Component\Form\FormBuilderInterface;

class SearchType extends AbstractType
{
public function buildForm(FormBuilderInterface $builder, array $options): void
{
        $builder->add('q', FormSearchType::class, [
            'label' => false,
            'attr' => [
            'placeholder' => 'Recherchez un article',
            'aria-label' => 'Recherchez un article'
            ]
        ]);
    }
}

SearchController.php：

<?php

namespace App\Controller;

use App\Form\SearchType;
use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\Routing\Attribute\Route;
use App\Repository\ArticlesRepository;

class SearchController extends AbstractController
{
    #[Route('/search', name: 'search')]
    public function search(Request $request, ArticlesRepository $articlesRepository): Response
    {
        $form = $this->createForm(SearchType::class);
        $form->handleRequest($request);

        if ($form->isSubmitted() && $form->isValid()) {
            $searchText = $form->get('q')->getData();
            $articles = $articlesRepository->findByKeywordInTitle($searchText);
            return $this->render('partials/search_results.html.twig', [
                'searchText' => $searchText,
                'articles' => $articles,
            ]);
        }

        return $this->render('partials/Header.html.twig', [
            'form' => $form->createView(),
        ]);
    }
}

Answer 1

{{ form_widget(form.q) }}

尽管在这个简单的情况下，您可以将所有三个 Twig 线替换为

{{ form(form) }}