Symfony-Disabling specific field validations from controller - symfony

Question

I am using Symfony 2.7.6. I have created an entity called employee and its interactive forms are generated using doctrine crud generator. Entity have the following fields
1. id
2. firstname
3. lastname
4. email
5. username
6. password
validations are working as expected from user registration form for all the fields.
ISSUE: I have created a login form and i want to suppress validation for the fields firstname, lastname and email and exclude these elements from rendering on my page
I have modified my controller like this for rendering my form
$entity = $em->getRepository('XXXEmployeeBundle:Employee');
$form = $this->createForm(new \XXX\EmployeeBundle\Form\EmployeeType(), $entity, array(
'action' => $this->generateUrl('user_login'),
'method' => 'POST',
));
$form->add('submit', 'submit', array('label' => 'Update'));
$form->remove('firstname');
$form->remove('lastname');
$form->remove('email');
$form->handleRequest($request);
This works fine when the from is rendering as the fields are excluded from the form. But my $form->isvalid() is returning false. As I have printed the errors using $form->getErrorsAsString() method, its showing like:
firstname: ERROR: First name cannot be empty. lastname: ERROR: Last name code cannot be empty. employeeFirstName: ERROR: Employee first name cannot be empty. email: ERROR: Email cannot be empty.
Is this the right method to achieve this functionality?? Please help me in solving the issue. Thanks

Answer 1

In your entity you mush include nullable=true like this
/**
* #ORM\Column(type="string", nullable=true)
*
* #var string
*/
protected $nombre;
And telling doctrine that is nullable, neither backend/frontend check the value.
Greetings !

Answer 2

I think problem in logic.
When you create registration form - you want to create and save new
entity.
When you create login form - you want to compare login and
password between form and entity.
So. You should create special form class for login (not from registration) and don't set data-enitity (second parameter in createForm function)
And, please check if you have the same form object in controller action that handles this form.

Answer 3

You can make a work around
Get all form's errors within your controller by
$form->getErrors()
and then loop over them, if it's the error you know it would happen, just bypass it on purpose and process further.
if ($form->isSubmitted()) { // remove $form->isValid() check
foreach($form->getErrors() as $error) {
// check if it's expected error, then do nothing and proceed further for user
// if it's unexpected throw an exception, catch them below and add error message to session flashbag. or something similar
}
}