The following (simple) question from me:

```
  $user = new User();
  $user->setEventid(2);
  $user->setT(new \DateTime('now'));

  $em = $this->getDoctrine()->getManager();
  $em->persist($user);
  $em->flush();

  $form = $this->createFormBuilder($user)
    ->add('email', 'email')
    ->add('terms', 'checkbox', array(
          'label'     => 'Read terms?',
          'required'  => true))
    ->getForm();

```

This is my code. Email is property of the user, terms not.
I want them users to save their email and check the terms-checkbox but i just need to save the email, not if they check the box - if they don't they cant submit the form.

You know what i mean? I'm shure its pretty simple to achieve this ;)

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