在symfony2中创建自定义表单类型:无法覆盖buildView()

问题描述

我正在symfony2中创建一个自定义表单类型.但是每次我尝试覆盖buildForm()方法时，都会出现此错误:

I am creating a custom form type in symfony2. But every time I try to overwrite the buildForm() method I get this error:

我当然知道这意味着什么.我什至从提到的界面复制了方法签名.还是一样.这是我的课程:

Of course I understand what this means. I even copied the method signature from the mentioned interface. Still the same. This is my class:

namespace SeduceMe\SiteBundle\Form\Type;

use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilder;

class UniFormTextType extends AbstractType 
{
    public function getDefaultOptions(array $options)
    {
        return array('placeholder' => null);
    }

    public function getParent(array $options)
    {
        return 'text';
    }

    public function getName()
    {
        return 'UniFormText';
    }

    public function buildForm(FormBuilder $builder, array $options)
    {
        $builder->setAttribute('placeholder', $options['placeholder']);
    }

    public function buildView(FormView $view, FormInterface $form)
    {
        $view->set('placeholder', $form->getAttribute('placeholder'));
    }
}

推荐答案

需要为FormView和FormInterface添加use语句.

Need to add use statements for FormView and FormInterface.

use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilder;
use Symfony\Component\Form\FormView;
use Symfony\Component\Form\FormInterface;
use Symfony\Component\Form\FormError;
use Symfony\Component\Form\CallbackValidator;
use Symfony\Component\Form\FormValidatorInterface;

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