protected void createDepartmentInput(Form<T> form) {
Fragment f = new Fragment("dept", "department", this);
DropDownChoice<UserDepartment> userDepartment =
new DropDownChoice<UserDepartment>(
"user.userDepartment",
getUserDepartments(),
new ChoiceRenderer<UserDepartment>("name"));
userDepartment.setRequired(true);
userDepartment.setLabel(new ResourceModel("admin.user.department"));
userDepartment.add(new ValidatingFormComponentAjaxBehavior());
f.add(userDepartment);
f.add(new AjaxFormComponentFeedbackIndicator("departmentValidationError", userDepartment));
form.add(f);
}