Symfony 2.7。如何在表单提交后获得/设置表单字段的值？ [英] Symfony 2.7. How to get/set value of the Form field after Form submission?

问题描述

我想在表单提交之后为Symfony 2.7设置表单隐藏日期时间元素的值（unix timestamp）。

  $ starttimeStr = $ form-> get（'meetingbundle_event [starttimeStr]'）; //这里我打算以字符串格式获取用户输入的日期
 $ dateObj = new \Datetime（$ starttimeStr）; 
 $ starttimeInt = $ dateObj-> getTimestamp（）; 
 $ form-> get（'meetingbundle_event [starttimeInt]'） - > setData（$ starttimeInt）; //这里我想设置十进制格式的日期时间
  

但是这不起作用，因为也没有id meetingbundle_event_starttime ，也不是名称 meetingbundle_event [starttimeStr] 不被接受为的有效参数get（string $ name ）FormInterface：
http://api.symfony.com/3.0/Symfony/Component/Form/FormInterface.html
我通过在Firefox中使用Tools-> WebDeveloperExtension-> Forms-> DisplayFormDetails知道名称和id。

因此我尝试了 $ elem = $ form-> all（）; 来查看我的名字表单元素，但我看不到结果：

  print_r（$ elem）; //崩溃网页浏览器
 $ fs-> dumpFile（'C：\Bitnami\wampstack-5.5.30-0\sym_prog\proj2_27\form.txt'，$ elem）; * /抱怨没有内存
 
 $ elemser = serialize（$ elem）; //给出php不能序列化的错误Closure 
 
 $ elemjson = json_encode（$ elem）; 
 $ fs-> dumpFile（'C：\Bitnami\wampstack-5.5.30-0\sym_prog\proj2_27\form.txt'，$ elemjson）; //输出空字符串
  

什么是Form字段的默认命名规则，以便我可以检索它们 $ form-> get（'field_name'）？

解决方案

要获取元素值，请使用 $ form-> getData（）['％element_name％']

因为我知道无法更改提交的表单通过调用 $ form-> setData（）显式调用元素值。所以如果你想改变表单中提交的表单元素值，可以使用 FormBuilder 方法 addViewTransformer http://symfony.com/doc/current/cookbook/form/data_transformers.html 或在表单事件监听器 http://symfony.com/doc/current/components/form/ form_events.html 。

I want to set the value (unix timestamp) for the form hidden datetime element after the form submission, Symfony 2.7.

$starttimeStr=$form->get('meetingbundle_event[starttimeStr]');// here i intend to get user input for the date in string format
$dateObj = new \Datetime($starttimeStr); 
$starttimeInt=$dateObj->getTimestamp();
$form->get('meetingbundle_event[starttimeInt]')->setData($starttimeInt); //here i want to set  the datetime in decimal format

But this does not work, because nor id meetingbundle_event_starttime, nor name meetingbundle_event[starttimeStr] are not accepted as valid arguments for get(string $name) of FormInterface: http://api.symfony.com/3.0/Symfony/Component/Form/FormInterface.html I know name and id by using Tools-> WebDeveloperExtension->Forms->DisplayFormDetails in Firefox.

Thus i tried $elem=$form->all(); to see what are the names of my form elements, but i can not see the result:

print_r($elem); // crashes web-browser
$fs->dumpFile('C:\Bitnami\wampstack-5.5.30-0\sym_prog\proj2_27\form.txt', $elem ); */ Complains that there is no memory

$elemser=  serialize($elem); //gives error that  php can not serialize Closure

$elemjson = json_encode($elem);
$fs->dumpFile('C:\Bitnami\wampstack-5.5.30-0\sym_prog\proj2_27\form.txt', $elemjson ); // outputs empty strings

What is the default naming rules for Form fields in order i could retrieve them using $form->get('field_name')?

解决方案

To get element value use $form->getData()['%element_name%']
As I know it is impossible to change submitted form element value explicit by calling $form->setData(). So if you want to change submitted form element value inside form use FormBuilder method addViewTransformer http://symfony.com/doc/current/cookbook/form/data_transformers.html or do it in form event listener http://symfony.com/doc/current/components/form/form_events.html.

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