Lock a dropdown field for a specific role (for nsinelnikov)

Hi nsinelnikov,
in registration form (which assigns “patient” role) I have e dropdown to choose doctor name.
Doctors list in drop down is retrieved from the function:

function doctors_dropdown_list() {
$users = get_users(array(
  'meta_key' => 'last_name',
  'role' => 'um_doctor',
  'orderby' => 'meta_value',
));
  foreach ( $users as $user ) {
      $user_names[$user->display_name] = $user->display_name;
}
  return $user_names; 
}

then called back in the “Choices Callback” option in field, OK.

Now…when a doctor opens a patient’s profile I would like to block the dropdown so that it cannot be changed.
Practically prevent the “doctor” role from changing this field.
How can I do? Do you have anything to suggest to me?
Thanks in advance
Lion

• This topic was modified 4 years, 9 months ago by Lion73.