Question

所以我试图通过各自的服务将FormType与FormHandler一起使用，以获得非常干净的Form流程。现在问题是我在Symfony 3.0中收到错误： Expected argument of type "string", "AppBundle\Form\Type\CurrencyType" given

我不确定如何在新版本中使用它。

FormType：

/**
 * Class CurrencyType
 * @package AppBundle\Form\Type
 */
class CurrencyType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('displayName', TextType::class)
            ->add('symbol', TextType::class)
            ->add('save', SubmitType::class, array('label' => 'Voeg Currency toe'))
        ;
    }

    public function setDefaultOptions(OptionsResolver $resolver)
    {
        $resolver->setDefaults(array(
            'data_class' => 'AppBundle\Entity\Currency'
        ));
    }
}

表单处理程序：

class CurrencyFormHandler
{
    /**
     * @var Request
     */
    protected $requestStack;

    /**
     * @var CurrencyManager
     */
    protected $currencyManager;

    /**
     * @var FormInterface
     */
    protected $form;

    /**
     * CurrencyFormHandler constructor.
     * @param FormInterface $form
     * @param RequestStack $requestStack
     * @param CurrencyManager $currencyManager
     */
    public function __construct(FormInterface $form, RequestStack $requestStack, CurrencyManager $currencyManager)
    {
        $this->form = $form;
        $this->requestStack = $requestStack;
        $this->currencyManager = $currencyManager;
    }

    /**
     * Process the form
     *
     * @param Currency|null $currency
     * @return bool
     */
    public function process(Currency $currency = null)
    {
        if (null === $currency) {
            $holiday = $this->currencyManager->create();
        }
        $this->form->setData($currency);
        $this->form->handleRequest($this->requestStack->getCurrentRequest());
        if ($this->form->isValid()) {
            $this->onSuccess($currency);
            return true;
        }
        return false;
    }

    /**
     * When the form is succesfully posted
     *
     * @param Currency $currency
     */
    public function onSuccess(Currency $currency)
    {
        $this->currencyManager->save($currency);
    }
}

服务：

<service id="app.currency.form" class="Symfony\Component\Form\Form">
            <argument>app_currency</argument>
            <argument type="service" id="app.currency.form.type" />
            <factory method="createNamed" service="form.factory" />
        </service>
        <service id="app.currency.form.type" class="AppBundle\Form\Type\CurrencyType">
            <tag name="form.type" alias="currencyform"/>
        </service>
        <service id="app.currency.form.handler"
                 class="AppBundle\Form\Handler\CurrencyFormHandler">
            <argument type="service" id="app.currency.form" />
            <argument type="service" id="request_stack" />
            <argument type="service" id="app.currency.manager"/>
        </service>

控制器：

/**
 * Class AddController
 * @package AppBundle\Controller\Currency
 */
class AddController extends Controller
{
    /**
     * @Route("/currency/add", name="currency_add")
     * @param Request $request
     * @return \Symfony\Component\HttpFoundation\RedirectResponse|\Symfony\Component\HttpFoundation\Response
     */
    public function indexAction(Request $request)
    {
        $form = $this->get('app.currency.form');
        $formHandler = $this->get('app.currency.form.handler');
        $process = $formHandler->process();

        if ($process) {
            $this->get('session')->getFlashBag()->add('success', 'Currency succesvol toegevoegd');
            return $this->redirect($this->generateUrl('currency_overview'));
        }

        return $this->render(':currency:add.html.twig', [
            'form' => $form->createView(),
        ]);
    }
}

那么到底出了什么问题呢？这曾经在Symfony 2中一直有效。

Answer 1

您的表单处理程序看起来不正确。你已宣布：

/**
 * @var CurrencyManager
 */
protected $currencyManager;

但我相信默认情况下是一个字符串。然后你这样做：

public function onSuccess(Currency $currency)
{
  $this->currencyManager->save($currency);
}

尝试将其设置为＆＃34; Currency＆＃34;而不是＆＃34;字符串＆＃34;！

FormType和FormHandler作为Symfony3中的服务

1 个答案: