/**
  * Indicates whether or not an error exists.
  *
  * @param  sfRequest $request A request object
  * @param  string $name  An error name
  *
  * @return bool true, if the error exists, otherwise false
  */
 public static function hasError($request, $name)
 {
     return $request->hasAttribute('errors[' . $name . ']');
 }