php - Symfony custom constraint to Reset Password function form -

i have implemented password reset page project. working, try use best practices , reusable code. here problem. have formtype password reset form , resetting controller. know validating means mapping fields of form type object of class , having validation rules on properties of object. password reset, think using "non mapped" fields required. now, submit form , values in resettingcontroller. there check myself if user email, birthday , security answer exists. working think not implemented right way. possible add custom constraint whole resetformtype , when submitting form, should call constraint checks if user exists. want use symfony validation system, not "if, else , if..." wrote in controller.

here code:

resetpwformtype:

 public function buildform(formbuilderinterface $builder, array $options) {     $builder             ->add('username', null, array(                 'label' => 'resetting.request.username',                 'translation_domain' => 'fosuserbundle',                 'mapped' => false             ))             ->add('birthday', 'date', array(                 'years' => range(date('y') - 74, date('y') - 18),                 'label' => 'register.user.contact.birthdayblank',                 'translation_domain' => 'startup',                  'mapped' => false             ))             ->add('plainsecurityanswer', 'text', array(                 'label' => 'register.user.security.answer',                 'translation_domain' => 'startup',                  'mapped' => false             )); } 

resettingcontroller:

        $form = $this->container->get('form.factory')->create(new resetpwformtype());         $form->handlerequest($this->container->get('request'));          $username = $form->get('username')->getdata();         $birthday = $form->get('birthday')->getdata();         $securityanswer = $form->get('plainsecurityanswer')->getdata();          /** @var $user userinterface */         $user = $this->container->get('doctrine')->getrepository('userbundle:user')->finduserforpasswordreset($username, $birthday, $securityanswer);          $jsonreturn = array();          if($user !== null)         {           // etc.         } 

i'd use here "$form->isvalid()" method, not saving each field of form in variable, passing repository method , checking there if user exists manually. , that, think constraint whole form required ..?

update: think need model class reset process, , whole class, can add custom validation constraint.

regards.

you can use 'constraints' option in form builder:

public function buildform(formbuilderinterface $builder, array $options) {     $builder         ->add('username', null, array(             'label' => 'resetting.request.username',             'translation_domain' => 'fosuserbundle',             'mapped' => false,             'constraints' => [                 new yourcustomconstraint()             ]         )); }