modify the entity object wrapped by a Symfony 2.0 FormBuilder - symfony

Question

Here's my code:
$form = $this->createFormBuilder($signupAttempt)
->add('email', 'text', array("label" => "your email:"))
->add('password', 'password', array("label" => "your password:"))
->add('passwordRepeat', 'password', array("label" => "repeat password:"))
->getForm();
if ($request->isMethod('POST')) {
$form->bindRequest($request);
$attempt = $form->getData();
$this->changeSomeAttributesOfSignupAttempt($attempt); // this does not work
if ($form->isValid()) { // this is not taking into account the modification made inside changeSomeAttributesOfSignupAttempt
return new Response("data provided are valid - u signiged up!");
}
}
See my problem? I'd like to make some changes to the entity and expect the form to be aware of such changes. Unfortunately it looks like the changes that I make are not perceived and, as a result, the rules defined in validaition.xml for the class SignupAttempt are not fulfilled.
here's my validation.xml for the entity SignupAttempt:
<getter property="emailInUseAlready">
<constraint name="False">
<option name="message">signup_attempt.whole.email_in_use</option>
</constraint>
</getter>
and the entity class itself:
class SignupAttempt {
protected $id = null;
protected $email = null;
protected $password = null;
protected $passwordRepeat = null;
protected $emailInUseAlredy = true;
public function __construct($email = null, $password = null, $passwordReapeat = null) {
$this->email = $email;
$this->password = $password;
$this->passwordRepeat = $passwordReapeat;
}
public function getId() {
return $this->id;
}
public function setId($id) {
$this->id = $id;
}
public function getEmail() {
return $this->email;
}
public function setEmail($email) {
$this->email = $email;
}
public function getPassword() {
return $this->password;
}
public function setPassword($password) {
$this->password = $password;
}
public function getPasswordRepeat() {
return $this->passwordRepeat;
}
public function setPasswordRepeat($passwordRepeat) {
$this->passwordRepeat = $passwordRepeat;
}
public function setEmailInUseAlready($bool) {
$this->emailInUseAlredy = $bool;
}
public function isEmailInUseAlready() {
return $this->emailInUseAlredy;
}
public function isSecondPasswordMatching() {
return $this->password === $this->passwordRepeat;
}
public function import(array $data) {
throw new \RuntimeException("implement this");
}
}
any idea?

Answer 1

When one performs $form->isValid(), the returned (boolean) value is in fact pre-evaluated at the time when the request was bound to the form.
As a result, changing values of the entity returned by $form->getData() is totally useless as validation happens beforehand and on the initial values held by the entity object when it is originally created.