Last Updated: February 25, 2016

Symfony2 custom field & validator

Uses:

use Symfony\Component\Form\CallbackValidator;
use Symfony\Component\Form\FormInterface;
use Symfony\Component\Form\FormError;

... some code

$builder ->add('custom_field', 'text', array(
 'mapped' => false,
 ));

$callback = function(FormInterface $form) {
 if ($form['custom_field']->getData() == 'something' )
 {
 $form->addError(new FormError('Oops ! Error Message'));
 }
 };

$builder->addValidator(new CallbackValidator($callback));

some code...

symfony v. 2.1