Symfony如何禁用默认选项 [英] Symfony how to disable the default option

问题描述

根据此网址将默认文本设置为选择（下拉框）/菜单我需要在symfony中为占位符添加 disabled 属性。这是我的代码。

  $ builder 
  - > add（'name'，'text'，array（
'标签'=>'商业名称'，
））
  - > add（'country'，'entity'，array（
'class'=>'AppBundle：Country' ，
'property'=>'name'，
'placeholder'=>'请选择'，
））; 
  

现在我需要添加 disabled code>< option value =disabled>请选择< / option>

我该怎么做？什么是最好的方式来做到这一点？

解决方案

如果这个话题仍然是开放的...我今天有类似的问题，这样管理它。 （在symfony 2.7.10中测试过）

显然，占位符是变量中的一个独立属性，因此您不能选择它在 finishView 中。

在 buildForm 方法：
$ b $ pre $ $ builder-> add（'label'，'choice'，array（
'data'= > $ var，//您的默认数据
'read_only'=> true，
'placeholder'=> false，//执行条件以检查您想要的选项是否只读
））;

实现 finishView 方法 AbstractType ）：

  public function finishView（FormView $ view，FormInterface $ $ options 
 
 foreach（$ view-> children ['country']  - > vars ['choices'] as $ id => $ choiceView）{$ b $如果（$ id！= $ yourAcceptedValueId）{
 $ choiceView-> attr = ['disabled'=>}; //实现一个条件来阻止接受/希望的选项被禁用。 禁用]; 
} 
} 
} 
  

不幸的是，没有占位符选项，所以你必须实现两个设置来实现这一点。

问候

According to this URL Set Default Text in a Select (drop-down) box/menu I need add disabled attribute for the placeholder in symfony. This is my code.

$builder
    ->add('name', 'text', array(
        'label' => 'Business Name',
    ))           
    ->add('country', 'entity', array(
        'class' => 'AppBundle:Country',
        'property' => 'name',
        'placeholder' => 'Please select',
    )); 

Now I need to add disabled like <option value="" disabled>Please select</option>

How can I do it? What is the best way to do that?

解决方案

if this topic is still open... I had a similar problem today and managed it this way. (tested in symfony 2.7.10)

Obviously the placeholder is a standalone attribute in vars, therefore you cannot select it in the finishView.

In your buildForm method:

$builder->add('label', 'choice', array(
    'data' => $var, // your default data
    'read_only' => true,
    'placeholder' => false, // implement a condition to check wether you want the choice read only
));

Implement the finishView Method (Interface implementation from AbstractType):

public function finishView(FormView $view, FormInterface $form, array $options)
{
    foreach ($view->children['country']->vars['choices'] as $id => $choiceView) {
        // implement a condition to prevent the accepted/wanted option be disabled
        if ($id != $yourAcceptedValueId) {
            $choiceView->attr = ['disabled' => 'disabled'];
        }
    }
}

Unfortunately in the choices list is no placeholder option, so you have to implement two settings to achieve this.

Greets

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