在不更改密码的情况下更新UserEntiy

I have User Entity for user registration on Symfony 4

I have User entity which has password.

Now I want to update some parts of row by Sonata Admin Bundle.

However it fails to update User entity because of there is no password.

in my UserAdmin.php

$formMapper->add('email');
$formMapper->add('nickName',null,array('required' => false));
$formMapper->add('enabled',null,array('required' => false));

I just want to change nickName or email without touching password.

in Entity I don't use validation, use Assert like this

User.php

/**
 * @Assert\NotBlank()
 * @Assert\Length(max=4096)
 */
private $plainPassword;

/**
 * The below length depends on the "algorithm" you use for encoding
 * the password, but this works well with bcrypt.
 *
 * @ORM\Column(type="string", length=64)
 */
private $password;

When registration, it works well like this in Controller.

$password = $passwordEncoder->encodePassword($user, $user->getPlainPassword());
$user->setPassword($password);

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