Question

获得以下错误..

在渲染模板期间抛出异常（＆＃34;表单的视图数据应该是标量，数组或\ ArrayAccess的实例，但是类Proxies__CG__的实例\ BLA \ MyBundle \ Entity \ TransportType。您可以通过将＆＃34; data_class＆＃34;选项设置为＆＃34; Proxies _CG __ \ BLA \ MyBundle \ Entity \ TransportType＆＃34;或者添加一个视图转换器来避免此错误将类Proxies__CG __ \ BLA \ MyBundle \ Entity \ TransportType的实例转换为MyBundle中的标量，数组或\ ArrayAccess的实例。＆＃34;）在第8行中运输：form.html.twig。

$builder->add('variables','collection', array(
            'type' => new AbcType(),
            'options'  => array(
                'required'  => true,
                ),
            'constraints' => new NotNull()));

AbcType.php

class AbcType extends AbstractType
{
    /**
     * Build form
     *
     * @param FormBuilder $builder
     * @param array       $options
     *
     * @return void
     */
    public function buildForm(FormBuilderInterface $builder, array $options)
    {

        $builder->add('importance', null, array('empty_value'=>false,'expanded'=>true,
                                'required'=>true,'multiple'=>false,
                                'constraints' => new NotNull()))
            ->add('timeSpent', null, array(
                                'empty_value'=>false,'expanded'=>true,
                                'required'=>true,'multiple'=>false,
                                'constraints' => new NotNull()
                                )
            );
    }

    /**
     * setDefaultOptions set Default values
     *
     * @param OptionsResolverInterface $resolver
     */
    public function setDefaultOptions(OptionsResolverInterface $resolver)
    {
        $resolver->setDefaults(array(
            'data_class' => 'Demo\MyBundle\Entity\Abc'
        ));
    }

    /**
     * getName will return Form name
     * @return string
     */
    public function getName()
    {
        return 'demo_mybundle_abctype';
    }
}

Answer 1

我使用以下链接解决了问题......

https://github.com/symfony/symfony/issues/14877

Answer 2

确保您拥有＆＃39; data_class＆＃39;在AbcType类的setDefaultOptions中指定的默认值：

... build form ...

/**
 * @param OptionsResolverInterface $resolver
 */
public function setDefaultOptions(OptionsResolverInterface $resolver)
{
    $resolver->setDefaults(array(
        'data_class' => 'AbcBundle\Entity\Abc'
    ));
}

Symfony 2.7升级后，带有单选按钮的Form CollectionType失败

2 个答案: