book_admin_edit_validate
Definition
book_admin_edit_validate($form, &$form_state)
drupal/modules/book/book.admin.inc, line 89
Description
Check that the book has not been changed while using the form.
@see book_admin_edit()
Code
function book_admin_edit_validate($form, &$form_state) {
if ($form_state['values']['tree_hash'] != $form_state['values']['tree_current_hash']) {
form_set_error('', t('This book has been modified by another user, the changes could not be saved.'));
$form_state['rebuild'] = TRUE;
}
}