registerUserForm.class.php

<?php

class RegisterUserForm extends BaseRegisterUserForm {

  public function configure()
  {
    parent::configure();

		$this->widgetSchema['is_condition'] = new sfWidgetFormInputCheckbox();
		$this->setValidator('is_condition', new sfValidatorChoice(array('choices' => array('on'))));
		unset($this['salt']);

		$this->widgetSchema->setLabels(Array(
			'username'			=>		'Nom d\'utilisateur',
			'email'				=>		'E-mail',
			'password'			=>		'Mot de passe',
			'firstname'			=>		'Prénom',
			'lastname'			=>		'Nom de famille',
			'phone'				=>		'Téléphone',
			'company'			=>		'Compagnie',
			'companyType'		=>		'Objet de la compagnie',
			'companyVat'		=>		'N° de TVA',
			'companyAddress'	=>		'Adresse',
			'companyCp'			=>		'Code Postal',
			'companyCity'		=>		'Ville',
			'companyCountry'	=>		'Pays',
			'companyPhone'		=>		'Téléphone',
			'companyUrl'		=>		'Site Web',
			'companyFunction'	=>		'Fonction au sein de l\'entreprise',
			'is_mailinglist'	=>		's\'abonner à la newsletter',
			'repeat_password'	=>		'répéter le mot de passe',
			'is_condition' 		=>		'accepter les <a href=\'#\' id=\'condition\'>conditions d\'utilisation</a>'
		));
  }
}

baseRegisterUserForm.class.php

<?php

class BaseRegisterUserForm extends PluginUserForm {

  public function configure()
  {
    $this->setWidget('password',  new sfWidgetFormInputPassword());
    $this->setWidget('repeat_password',  new sfWidgetFormInputPassword());

    $this->setValidators(array(
      'id' => new sfValidatorDoctrineChoice(array('model' => $this->getModelName(), 'column' => 'id', 'required' => false)),
      'username' => new sfValidatorString(array('required'=> true)),
      'email' => new sfValidatorEmail(array('required'=> true)),
      'password' => new sfValidatorString(array('required'=> true)),
      'repeat_password' => new sfValidatorString(array('required'=> true)),
    ));

    unset($this['id'],$this['is_active'],$this['is_super_admin'],$this['last_login'],$this['created_at'],$this['updated_at']);

    $this->validatorSchema->setPostValidator(new sfValidatorAnd(array(
      new sfValidatorSchemaCompare('password', '==', 'repeat_password'),
      new sfValidatorDoctrineUnique(array('model'=> 'User','column'=> 'email')),
      new sfValidatorDoctrineUnique(array('model'=> 'User','column'=> 'username')),
    )));
  }
}

?>