Symfony2 FOSUserBundle merge resetPasswordform with custom form - php

Question

I am trying to create a form by merging 2 form types as following.
Teacher Entity that has a one to one relation with User Entity.
I am using FOSUserBundle and i want to merge the ResettingFormType with my custom TeacherFormType, to end up with a form that both fields from my custom & fos reset password form.
1- Teacher Entity:
/**
* #var \User
*
* #ORM\OneToOne(targetEntity="ITJari\UserBundle\Entity\User", fetch="EAGER")
* #ORM\JoinColumn(name="user_id", referencedColumnName="id")
*
*/
private $user;
public function getUser() {
return $this->user;
}
public function setUser($user) {
$this->user = $user;
return $this;
}
2- Extending FOS Reset password:
namespace ITJari\SchoolBundle\Form\Type;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;
class ResettingFormType extends AbstractType {
public function buildForm(FormBuilderInterface $builder, array $options) {
}
public function getParent() {
return 'fos_user_resetting';
}
public function getName() {
return 'ragab';
}
}
3- Teacher Form Type
namespace ITJari\SchoolBundle\Form\Type;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\OptionsResolver\OptionsResolverInterface;
class TeacherFormType extends AbstractType {
public function buildForm(FormBuilderInterface $builder, array $options) {
}
public function setDefaultOptions(OptionsResolverInterface $resolver) {
$resolver->setDefaults(array(
'data_class' => 'ITJari\SchoolBundle\Entity\Teacher',
));
}
public function getParent() {
return 'fos_user_resetting';
}
public function getName() {
return 'teacherform';
}
}
4- Inside controller:
$teacher = new \ITJari\SchoolBundle\Entity\Teacher();
$teacher->setUser($user);
$form = $this->createForm('teacherform', $teacher);
But i got the following error:
Neither the property "plainPassword" nor one of the methods "getPlainPassword()", "isPlainPassword()", "hasPlainPassword()", "__get()" exist and have public access in class "ITJari\SchoolBundle\Entity\Teacher".
500 Internal Server Error - NoSuchPropertyException