DrupalAPI.de

1. drupal
   1. drupal6
   2. drupal7

Code

modules/node/node.module, line 2737

<?php
function node_assign_owner_action_validate($form, $form_state) {
  $count = db_result(db_query("SELECT COUNT(*) FROM {users} WHERE name = '%s'", $form_state['values']['owner_name']));
  if (intval($count) != 1) {
    form_set_error('owner_name', t('Please enter a valid username.'));
  }
}
?>