使用与同一个类相关的一些动态表单

Question

Symfony 2.3

I'm embedding some Forms to be able to change each user property related to permissions. I've created an UserAdminType which is displayed for each user in the same page:

<?php

namespace Msalsas\UserAdminBundle\Form;

use Msalsas\UserBundle\Entity\User;
use Msalsas\UserBundle\Entity\ExtendedUser;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\OptionsResolver\OptionsResolverInterface;
use Symfony\Component\Form\FormInterface;
use Symfony\Component\Form\FormEvents;
use Symfony\Component\Form\FormEvent;

class UserAdminType extends AbstractType
{
private $user;

public function __construct(User $user)
{
    $this->user = $user;
    $this->extendedUser = new ExtendedUser($this->user);
}

/**
 * @param FormBuilderInterface $builder
 * @param array $options
 */
public function buildForm(FormBuilderInterface $builder, array $options)
{

    $extendedUser = $this->extendedUser;

    $builder
        ->add('extendedRole',
            'choice', array('choices' => array(
                $extendedUser::ROLE_1 => "Role 1",
                $extendedUser::ROLE_2 => "Role 2",
                $extendedUser::ROLE_3 => "Role 3",
             ),
            'label' => $this->user->getUsername()
        ))
        ->add('Change roles for '.$this->user->getUsername(), 'submit')
    ;

    $builder->addEventListener(
        FormEvents::POST_SUBMIT,
        function (FormEvent $event) {
            $form = $event->getForm();

            $data = $event->getData();

            if( ! $form->getClickedButton('Change roles for '.$this->user->getUsername()) )
            {
                  // Here I should avoid submitting the form 
            }

        }
    );

}

/**
 * @param OptionsResolverInterface $resolver
 */
public function setDefaultOptions(OptionsResolverInterface $resolver)
{
    $resolver->setDefaults(array(
        'data_class' => 'Msalsas\UserBundle\Entity\ExtendedUser',
        'empty_data' => function (FormInterface $form) {
                return null;
            }
    ));
}

/**
 * @return string
 */
public function getName()
{
    return 'extendedUserRoleForm';
}
}

The problem is that when I submit one of those forms, all other forms are also submitted, returning an error, because the extendedUser uses a constructor to initialize the object with the User as parameter:

Catchable Fatal Error: Argument 1 passed to Msalsas\UserBundle\Entity\ExtendedUser::__construct() must be an instance of Msalsas\UserBundle\Entity\User, none given, called in .../vendor/symfony/symfony/src/Symfony/Component/Form/Extension/Core/Type/FormType.php on line 140 and defined

I've also tried to set the empty_data with a new default ExtendedUser:

public function setDefaultOptions(OptionsResolverInterface $resolver)
{
    $resolver->setDefaults(array(
        'data_class' => 'Msalsas\UserBundle\Entity\ExtendedUser',
        'empty_data' => function (FormInterface $form) {
                return $this->extendedUser;                    
            }
    ));
}

Now, when submitting the form, the new entity is persisted, but the other forms are still submitted, and returning an error: This form should not contain extra fields. This seems to be due to the duplicated property name (extendedRole).

How could I avoid the other forms to be submitted?

Answer 1

I've found out the solution here.

Each Form must have different name. So I've added a $name property, and assigned it in the constructor:

private $user;
private $name = 'default_name_';
private $extendedUser;

public function __construct(User $user, $formName)
{
    $this->user = $user;
    $this->extendedUser = new ExtendedUser($this->user);
    $this->name = $this->name.$formName;
}

//... (No event required)

/**
 * @return string
 */
public function getName()
{
    return $this->name;
}

The $formName parameter is relative to the current user. In this way, only the "clicked" form is submitted. Wish it helps.