function path_form_element_validate

Form element validation handler for URL alias form element.

See also

path_form_element()

File

core/modules/path/path.module, line 922

Enables users to customize URLs and provide automatic URL alias patterns.

Code

function path_form_element_validate($element, &$form_state, $complete_form) {
  if (!empty($form_state['values']['path']['alias'])) {
    // Trim the submitted value.
    $alias = trim($form_state['values']['path']['alias']);
    form_set_value($element['alias'], $alias, $form_state);
    // Node language needs special care. Since the language of the URL alias
    // depends on the node language, and the node language can be switched
    // right within the same form, we need to conditionally overload the
    // originally assigned URL alias language.
    if (isset($form_state['values']['langcode'])) {
      form_set_value($element['langcode'], $form_state['values']['langcode'], $form_state);
    }

    $path = $form_state['values']['path'];

    // Ensure that the submitted alias does not exist yet.
    $query = db_select('url_alias')
      ->condition('alias', $path['alias'])
      ->condition('langcode', $path['langcode']);
    if (!empty($path['source'])) {
      $query->condition('source', $path['source'], '<>');
    }
    $query->addExpression('1');
    $query->range(0, 1);
    if ($query->execute()->fetchField()) {
      form_error($element, t('The alias is already in use.'));
    }
  }
}