$trans_result = true;
                $trans = M();
                $trans->startTrans();   // 开启事务

                try {   // 异常处理
                    // 更新实施
                    $busbidList = M("busbid")->where($map)->select();
                    foreach($busbidList as $k => $v) {
                        $map['id'] = $busbidList[$k]['id'];
                        $result = M('busbid')->where($map)->data($data)->save();
                        if ($result === false) {
                            throw new Exception(“错误原因”);
                        }
                    }
                } catch (Exception $ex) {
                    $trans_result = false;
                    // 记录日志
                    Log::record("== xxx更新失败 ==", 'DEBUG'); 
                    Log::record($ex->getMessage(), 'DEBUG');
                }

                if ($trans_result === false) {
                    $trans->rollback();
                    // 更新失败
                    $array['status'] = 0;
                } else {
                    $trans->commit();
                    // 更新成功
                    $array['status'] = 1;
                }