public static function addLog($from, $to)
 {
     $from_log = new UserFriendInviteLog();
     $from_log->u_id = $from;
     $from_log->friend_id = $to;
     $from_log->save();
     $to_log = new UserFriendInviteLog();
     $to_log->u_id = $to;
     $to_log->friend_id = $from;
     $to_log->save();
 }
 public function removeInvite($id)
 {
     try {
         $log = UserFriendInviteLog::find($id);
         if (empty($log)) {
             throw new Exception("好友邀请已删除", 3001);
         }
         $u_id = $log->u_id;
         $friend = $log->friend_id;
         $userFriend = UsersFriend::findLinkById($u_id, $friend);
         if ($userFriend === UsersFriend::$RELATION_NONE) {
         } elseif ($userFriend->t_status == 1) {
             $userFriend->remove();
         }
         $log->delete();
         $re = Tools::reTrue('删除好友邀请成功');
     } catch (Exception $e) {
         $re = Tools::reFalse($e->getCode(), '删除好友邀请失败:' . $e->getMessage());
     }
     return Response::json($re);
 }