在Symfony2中设置表单值转换器的默认值

I have the following form type set up in Symfony2 and I'm trying to add a default value to dateField but can't seem to get it to work.

我在Symfony2中设置了以下表单类型，我正在尝试向dateField添加一个默认值，但似乎无法让它工作。

In "Tried 1" below I get a "The form's view data is expected to be an instance of class DateTime, but is a(n) string" error... which puzzles me a little because if I give a string it tells me it needs to be a DateTime object, and in "Tried 2" it runs without errors but no default values are changed. Currently the form defaults to '-0001-11-30 00:00:00'. Is there any way to set these defaults like this?

在下面的“Tried 1”中，我得到一个“表单的视图数据应该是类DateTime的实例，但是是一个（n）字符串”错误...这让我感到困惑，因为如果我给它一个字符串它告诉我它必须是一个DateTime对象，并且在“Tried 2”中它运行时没有错误，但没有更改默认值。目前表单默认为'-0001-11-30 00:00:00'。有没有办法设置这样的默认值？

$builder
        ->add(
            $builder->create('dateField', 'hidden' )->addViewTransformer( new DateTimeToStringTransformer() )
        )
        ->add('field2', 'hidden')
        ->add('field3', 'hidden')
        ->add('submit', 'submit')
        ->getForm();

Tried 1:

试过1：

->add($builder->create('boutDate', 'hidden', array('data' => new \DateTime()))->addViewTransformer( new DateTimeToStringTransformer() ))

Tried 2:

尝试2：

->add(
    $builder->create('boutDate', 'hidden' )->addViewTransformer( new   DateTimeToStringTransformer() ),
        'hidden',
        array('data' => '2014-01-02')
)

1 个解决方案

#1

You don't have to use transformer. Just set string default value

您不必使用变压器。只需设置字符串默认值

$builder
        ->add($builder->create('boutDate', 'hidden', array('data' => '2014-01-02')))
        ->add('field2', 'hidden')
        ->add('field3', 'hidden')
        ->add('submit', 'submit')
        ->getForm();