表单即服务不起作用

Question

我在 Symfony 3.2 中加载表单作为服务时遇到问题，我将自定义字段创建为：

class ImageType extends AbstractType
{
    private $path;

    /**
     * ImageType constructor.
     */
    public function __construct($path)
    {
        $this->path = $path;
    }

    /**
     * @return string
     */
    public function getParent()
    {
        return FileType::class;
    }

    /**
     * @return string
     */
    public function getName()
    {
        return 'image';
    }

    /**
     * @param OptionsResolver $resolver
     */
    public function configureOptions(OptionsResolver $resolver)
    {
        $resolver->setDefaults(array(
            'image_name' => ''
        ));
    }

    /**
     * @param FormView $view
     * @param FormInterface $form
     * @param array $options
     */
    public function buildView(FormView $view, FormInterface $form, array $options)
    {
        $view->vars['image_name'] = $options['image_name'];
    }

    /**
     * @param FormBuilderInterface $builder
     * @param array $options
     */
    public function buildForm(FormBuilderInterface $builder, array $options)
    {

        $builder
            ->setAttribute('image_name', $options['image_name'])
            ->addModelTransformer(new ImageTransformer($this->path));
    }
}

和service.yml：

services:
    app.form_image_type:
        class: AppBundle\Form\Type\ImageType
        arguments: ['%upload_directory%']
        tags: [form.type]

但是当我运行代码时我有错误：

2/2 FileLoaderLoadException in FileLoader.php line 118: A "tags" entry must be an array for service "app.form_image_type" in /var/www/exammple.pl/app/config/services.yml. Check your YAML syntax in /var/www/example/app/config/services.yml (which is being imported from "/var/www/example.pl/app/config/config.yml"). 1/2 InvalidArgumentException in YamlFileLoader.php line 270: A "tags" entry must be an array for service "app.form_image_type" in /var/www/example.pl/app/config/services.yml. Check your YAML syntax.

但是根据文档，标签定义正确，所以这个问题已经解决了吗？

Answer 1

尝试使用此代码：

tags:
   - { name: form.type }

用3.2版本

看doc

表单即服务不起作用

Form as service not working

forms

symfony

symfony-3.2