Symfony 2 : Add a custom form element, not in an Entity

Question

I work with Symfony2 and I would like to create a registration form. I don't want to use FOSUserBundle.

So, I create an Entity Account (with fields : username, password, email...) and I create the form :

 $account = new Account();

$form = $this->createFormBuilder($account)
  ->add('username',         'text', array('label' => 'Nom de compte :'))
  ->add('password',    'password', array('label' => 'Mot de passe :'))
  ->add('email',            'email', array('label' => 'Adresse email :'))
  ->getForm();

Now, I want to add a confirmation field for the password. But, when I try to add a field with add() method, for example "password_confirmation" I have this :

Neither property "password_confirmation" nor method "getPasswordConfirmation()" nor method "isPasswordConfirmation()" exists in class "App\FrontBundle\Entity\Account"

How can I add a custom field ? And after, how to valid it ?

Thank you. BR.

Answer 1

An update for Symfony 2.1:

property_path has been deprecated and instead you should use mapped. The syntax remains the same:

->add('password_confirmation', 'password', array('mapped' => false))