symfony - 表单提交成功后如何清除表单值

Question

表单提交成功后如何清除表单值？

这些没有帮助:

How to clear field value with Symfony2 forms

Clear form values after successful submit

Controller :

namespace Car\BrandBundle\Controller;

use Car\BrandBundle\Entity\BrandEntity;
use Car\BrandBundle\Form\Type\BrandType;
use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;

class BrandController extends Controller
{
    public function indexAction()
    {
        $form = $this->getFrom();

        return $this->render('CarBrandBundle:Default:brand.html.twig',
                array('page' => 'Brand', 'form' => $form->createView(), 'brands' => $this->getBrands()));
    }

    public function createAction(Request $request)
    {
        if ($request->getMethod() != 'POST')
        {
            return new Response('Only POST method is allowed');
        }

        $form = $this->getFrom();

        $form->handleRequest($request);

        if ($form->isValid())
        {
            $submission = $form->getData();

            $em = $this->getDoctrine()->getManager();

            $brand = new BrandEntity();
            $brand->setName($submission->getName());

            $em->persist($brand);
            $em->flush();

            $this->redirect($this->generateUrl('brand'));
        }

        return $this->render('CarBrandBundle:Default:brand.html.twig',
                array('page' => 'Brand', 'form' => $form->createView(), 'brands' => $this->getBrands()));
    }

    private function getFrom()
    {
        return $this->createForm(new BrandType(), new BrandEntity(),
                array('action' => $this->generateUrl('brandCreate')));
    }

    private function getBrands()
    {
        $repo = $this->getDoctrine()->getRepository('CarBrandBundle:BrandEntity');
        $brands = $repo->findAll();

        return $brands;
    }
} 

Answer 1

同一页面处理提交时重置 symfony 表单
在 Bazyl 的方法中，在取消设置当前表单后创建另一个表单可能是不必要的任务。我建议重定向到同一页面，因为 symfony 文档( handling-form-submissions )还显示了一个重定向到另一个 Controller 的示例。

    if ($form->isSubmitted() && $form->isValid()) {
        // ... perform some action, such as saving the task to the database
        return $this->redirect($request->getUri());
    }

我已将示例源添加到 GitHub