如何将参数从控制器传递给 FormType 构造函数 [英] How to pass parameter to FormType constructor from controller

问题描述

在 Symfony2.7 中，我能够在创建表单时直接将参数从控制器传递给表单类型构造函数，但是在 Symfony3 中我无法做到！

In Symfony2.7 i was able to pass parameter to Form Type constructor directly from controller while creating the form, however in Symfony3 i'm not able to do it!

Symfony2.7 之前

$postedBy = $this->getUser()->getFullname();
$form = $this->createForm(new NewsType($postedBy));

Symfony3 之后

$form = $this->createForm(NewsType::class); // no idea how to pass parameter?

更新:我还想从以下位置访问它:

Update: I also wanted to access it from:

$builder->addEventListener(FormEvents::PRE_SET_DATA, function (FormEvent $event) {
    // how to access posted_by_name here which is sent from controller
}

任何帮助将不胜感激..

Any help will be highly appreciated..

推荐答案

感谢您抽出宝贵时间！我自己解决了这个问题:

Thanks for your time! i resolved this myself:

我从 NewsType 构造函数中删除了参数，并使用 $options 数组将数据添加到了 PostedBy 表单字段，并将数据从控制器传递到了 $options 数组，请检查以下内容:

I removed parameter from NewsType constructor and added data to postedBy form field using $options array, and passed data to $options array from controller, please check following:

新闻类型

public function buildForm(FormBuilderInterface $builder, array $options)
{
    $builder
        ->add('postedBy', HiddenType::class, array(
            'data' => $options['postedBy']
          )
        )
    ;
}

// WARNING: this is a MANDATORY block! Only options described here will be allowed to be passed.
public function configureOptions(OptionsResolver $resolver)
{
    $resolver->setDefaults(array(
        'postedBy' => null,
    ));
}

控制器

$form = $this->createForm(NewsType::class, $news, array(
    'postedBy' => $this->getUser()->getFullname(),
);

更新:如果您想从 addEventListener 访问 $options 数组，请使用以下代码:

UPDATE: Please use below code if you want to access $options array from addEventListener:

$builder->addEventListener(FormEvents::PRE_SET_DATA, function (FormEvent $event) {
    $postedBy = $event->getForm()->getConfig()->getOptions()['postedBy'];
}

希望对大家有所帮助！ 

Hope it helps somebody! 

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