how to add validation to unbound form field in symfony2

Question

I am trying to validate an unbound field in my symfony2 form.

I have googled it and found several similar solutions, so I did a copy-paste and put my own stuff in there, but it doesn't work for me. There is probably a use statement or something that was missing from all the solutions I read, omitted because everyone would know them to be necessary.. .except the rookie here that is.

My code:

<?php

namespace BizTV\UserBundle\Form;

use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilder;

use Symfony\Component\Validator\Constraints\CallbackValidator as CallbackValidator;
use Symfony\Component\Form\FormValidatorInterface;

use Doctrine\ORM\EntityRepository;

class newServerType extends AbstractType
{

    public function buildForm(FormBuilder $builder, array $options)
    {

        $builder
            ->add('company', 'entity', array(
                'label' => 'Vilket företag tillhör servern? ',
                'multiple' => FALSE,
                'expanded' => FALSE,
                'property' => 'companyName',
                'class'    => 'BizTV\BackendBundle\Entity\company',
            ));     

        $builder->add('screenName', null, array('property_path' => false, 'label' => 'Namn på skärmen (användaren kan ändra det senare) '));

        $builder-> addValidator(new CallbackValidator(function(FormInterface $form){
          $screenName = $form['screenName'];
            if (empty($screenName)) {
              $form['screenName']->addError(new FormError("Du måste ange ett namn för den nya skärmen"));
            }
        }));

        $builder
            ->add('username', 'text', array('label' => 'Servernamn (endast för serverns login samt vår referens)'))            
            ->add('plainPassword', 'repeated', array('type' => 'password', 'first_name' => 'Lösenord för server ', 'second_name' => 'Upprepa lösenord för server',));

    }

    public function getName()
    {
        return 'biztv_userbundle_newservertype';
    }
}

My error:

Catchable Fatal Error: Argument 1 passed to Symfony\Component\Form\FormBuilder::addValidator() must implement interface Symfony\Component\Form\FormValidatorInterface, instance of Symfony\Component\Validator\Constraints\CallbackValidator given, called in /var/www/biztv_symfony/src/BizTV/UserBundle/Form/newServerType.php on line 35 and defined in /var/www/biztv_symfony/vendor/symfony/src/Symfony/Component/Form/FormBuilder.php line 255

score 5 · Accepted Answer · answered Aug 17 '12 at 18:55

So, for anyone else needing validation for unbound form fields in symfony 2 here Is how I ended up doing it - turned out I was missing a bunch of use statements, they weren't listed on any of the sites where I found other threads on the subject.

I have weeded out everything but the essentials. Thanks to m2mdas for helping me along on this one.

<?php

namespace BizTV\UserBundle\Form;

use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilder;
use Symfony\Component\Form\FormInterface;
use Symfony\Component\Form\CallbackValidator;
use Symfony\Component\Form\FormValidatorInterface;
use Symfony\Component\Form\FormError;


use Doctrine\ORM\EntityRepository;

class newServerType extends AbstractType
{

    public function buildForm(FormBuilder $builder, array $options)
    {   
        $builder->add('screenName', null, array('property_path' => false, 'label' => 'Namn på skärmen (användaren kan ändra det senare) '));

        $builder-> addValidator(new CallbackValidator(function(FormInterface $form){
          $screenName = $form->get('screenName')->getData();
            if (empty($screenName)) {
              $form['screenName']->addError(new FormError("Du måste ange ett namn för den nya skärmen"));
            }
        }));    
    }

    public function getName()
    {
        return 'biztv_userbundle_newservertype';
    }
}

This method is deprecated in 2.1. See the following thread for more details: http://stackoverflow.com/questions/12911686/symfony-validate-form-with-mapped-false-form-fields — Żabojad, Jul 30 '13 at 16:34
Call to undefined method Symfony\Component\Form\FormBuilder::addValidator() — afilina, Jul 07 '15 at 14:32

score 2 · Answer 2 · answered Aug 16 '12 at 21:21

2

CallbackValidator FQCN should be Symfony\Component\Form\CallbackValidator .

answered Aug 16 '12 at 21:21

Mun Mun Das

14,992
2
44
43

Changed the USE as you said, I get a similar error message: Catchable Fatal Error: Argument 1 passed to BizTV\UserBundle\Form\{closure}() must be an instance of BizTV\UserBundle\Form\FormInterface, instance of Symfony\Component\Form\Form given in /var/www/biztv_symfony/src/BizTV/UserBundle/Form/newServerType.php line 30 – Matt Welander Aug 16 '12 at 21:36
1

Add `use Symfony\Component\Form\FormInterface;` at use section. – Mun Mun Das Aug 16 '12 at 21:43

how to add validation to unbound form field in symfony2

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