向Symfony3添加所有FormTypes的帮助选项

时间:2016-10-09 14:45:18

标签: php symfony symfony-forms

如何为所有现有的Symfony3 Type添加自定义'help'选项?

在Symfony2中,我这样做http://toni.uebernickel.info/2012/11/03/how-to-extend-form-fields-in-symfony2.1.html,但现在我升级到Symfony3并且它不再起作用了 - 它给了我“帮助”选项不存在

http://symfony.com/doc/current/form/form_customization.html#adding-help-messages可行,但需要将所有帮助文本移到模板中:

{{ form_widget(form.title, {'help': 'foobar'}) }}

...来自Type类:

->add(
    'periodFrom',
    TextType::class,
    [
        'label' => 'period-from',
        'required' => false,
        'help' => 'period-from.help'
    ]
)

我想避免这种情况。感谢。

1 个答案:

答案 0 :(得分:3)

为此,在此http://symfony.com/doc/current/form/form_customization.html#adding-help-messages之后,您可以创建表单类型扩展名,以便将help选项传递给所有表单字段:

<?php
// src/AppBundle/Form/Extension/FormTypeExtension.php
namespace AppBundle\Form\Extension;
use Symfony\Component\Form\AbstractTypeExtension;
use Symfony\Component\Form\Extension\Core\Type\FormType;
use Symfony\Component\Form\FormInterface;
use Symfony\Component\Form\FormView;
use Symfony\Component\OptionsResolver\OptionsResolver;

class FormTypeExtension extends AbstractTypeExtension
{
    public function buildView(FormView $view, FormInterface $form, array $options)
    {
        $view->vars['help'] = $options['help'];
    }

    public function configureOptions(OptionsResolver $resolver)
    {
        $resolver->setDefaults(array(
            'help' => null,
        ));
    }

    public function getExtendedType()
    {
        return FormType::class;
    }
}

现在注册表单类型扩展名:

services:
    app.form_type_extension:
        class: AppBundle\Form\Extension\FormTypeExtension
        tags:
            - { name: form.type_extension, extended_type: Symfony\Component\Form\Extension\Core\Type\FormType }