php - 未知的“表单”函数 php symfony/form twig

Question

在我的项目中，我安装了 symfony / form、symfony / twig-bridge，但是每当我运行模板时，我都无法识别我的标签来呈现我可能错过的表单？两者都在版本 5 中，一直显示这个，未知的“form”函数，未知的“form_start”函数

require 'vendor/autoload.php'; 
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\Extension\Core\Type\DateType;
use Symfony\Component\Form\Extension\Core\Type\SubmitType; 
use Symfony\Component\Form\Extension\Core\Type\TextType;  
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\Form\Forms; 
use Symfony\Component\Form\Extension\Core\Type\FormType;
use Symfony\Component\Validator\Validation;
use Symfony\Bridge\Twig\Form\TwigRendererEngine;     
use Symfony\Component\Form\Extension\Validator\ValidatorExtension;
use Symfony\Component\Form\Extension\Csrf\CsrfExtension;
use Symfony\Component\Security\Csrf\CsrfTokenManager;
use Symfony\Component\Translation\Translator;
use Symfony\Component\Translation\Loader\XliffFileLoader;
use Symfony\Bridge\Twig\Extension\TranslationExtension;
use Symfony\Bridge\Twig\Extension\FormExtension;
use Symfony\Component\Form\FormView;

class TaskController extends AbstractType
{
public function new()
{
    // creates a task object and initializes some data for this example       
    $formFactory = Forms::createFormFactory();
    $form = $formFactory->createBuilder()
        ->add('task', TextType::class)
        ->add('dueDate', DateType::class)
        ->add('save', SubmitType::class, ['label' => 'Create Task'])
        ->getForm();

    $loader = new \Twig\Loader\FilesystemLoader('vista/parte');
    $twig = new \Twig\Environment($loader, ['debug' => true]);                
    return $twig->render('foms.html.twig', ['form' => $form->createView()]);       
}
}

(new TaskController())->new();

Answer 1

你在这里遗漏了一些东西。

控制器和表单类型是两个不同的东西。您可以在控制器中创建表单，然后将其传递给视图。

但是，如果您想将表单与控制器分开，您可以创建一个将扩展的表单类型AbstractType

这应该是这样的：

class TaskController extends AbstractController // add the use for that one
{
    public function new()
    {
        $form = $this->createFormBuilder()
            ->add('task', TextType::class)
            ->add('dueDate', DateType::class)
            ->add('save', SubmitType::class, ['label' => 'Create Task'])
            ->getForm();

        return $twig->render('foms.html.twig', ['form' => $form->createView()]);       
    }
}