在Formbuilder :: add（）中配置EntityType时访问类的属性和方法

I`ve got a dropdown list in my Symfony2 form like this:

$builder->add('categories','entity', array(
            'class'     => 'MyBundle:Myentity',
            'property'  => 'name',
            'label'     => 'Mylabel',
            'expanded'  => false,
            'multiple'  => false,
            'label_attr'   =>  array ( 'class'      => 'control-label' ),
            'attr'   =>  array  (   'class'         => 'form-control',
                                    'placeholder'   => 'Placeholder',
                                    'title'         => "Mytitle",
                                    'data-toggle'   => 'tooltip',
                                    'data-myidfromDB'   => '????',
                                    'data-mynamefromDB'=>'????' etc. )));

So I am getting a list of MyBundle:Myentity objects and when I choose one I want to show all its properties (like ID, name, etc.) which are stored in my DB and described in Entity class, in different html data-* fields. If I select another one from the list I want to see all information related to my newly selected option in HTML (to change dynamically). Any ideas how to do that?

Since Symfony 2.7 you can set the option choice_attr to ChoiceType and set it a callable receiving the choice as an argument.

EntityType inherits this option and the choice in that case is the instantiated entity, so you can write something like :

$builder->add('categories','entity', array(
    'class' => 'MyBundle:MyEntity',
    'property' => 'name',
    'label' => 'Mylabel',
    'attr' => array('class' => 'form-control'),
    'label_attr' => array('class' => 'control-label'),
    'choice_attr' => function (\AppBundle\Entity\MyEntity $myEntity) {
        return array(
            'data-private-property' => $entity->getPrivateProperty(),
            'data-some-value' => $entity->someMethod(),
        );
    },
);

You can't do that in easy way. But you can put more information in select label.

Look on http://symfony.com/doc/current/reference/forms/types/entity.html#choice-label

Yout can put here more field details and get it from your javascript.