hook_form_alter根据用户的角色取消设置字段

Question

I am facing a problem when I try to use hook_form_alter to hide fields according to user's roles. I have used unset() and removed the field from the $form array, but it is still showing when the form is rendered.

Here is my code:

function mymodule_form_alter($form, $form_state, $form_id){
  global $user;
  if($form_id == 'my_content_type'){
    if(array_key_exists(5,$user->roles) && !array_key_exists(3,$user->roles)){
      if(empty($form_state['field']['args'][0]->title)){
        unset($form['field_body']);
      }
    }
  }
}

Answer 1

Instead of using unset() to hide a form element, you should set the #access property to FALSE . This keeps the form build tree intact, which avoids problems if other modules try to access or alter that information. Source

function MYMODULE_form_alter($form, $form_state, $form_id) {

  global $user;
  $account = $user;

  if ($form_id == 'MYCONTENTTYPE_node_form') {

    if (user_has_role(5, $account) && !user_has_role(3, $account)) {

      if (empty($form_state['field']['args'][0]->title)) {

        $form['field_body']['#access'] = FALSE;
      }
    }
  }
}

---

If this is still not working, double-check your if-requests. Are they really doing something? Are you currently logged-in as a corresponding user?

Answer 2

I have found the solution. I need just added the & with $form and $form_state in hook_form_alter parameters. Like hook_form_alter(&$form, &$form_state, $form_id)