ThinkPHP6多个模型事务的提交和回滚

        TopicOrderModel::startTrans();
        TopicOrderCommentModel::startTrans();
        try {
            $topicOrderModel = new TopicOrderModel;
            $topicOrderModel -> status = 4;
            $topicOrderModel -> save();
            TopicOrderModel::commit();

            $topicOrderCommentModel= new TopicOrderCommentModel;
            $topicOrderCommentModel-> topic_order_id = $findOrder -> id;
            $topicOrderCommentModel-> content = input('content');
            $topicOrderCommentModel-> pics = input('pics');
            $topicOrderCommentModel-> from_user_id = $findOrder -> user_id;
            $topicOrderCommentModel-> to_user_id = 'ppp';// 这里提交的数据和数据表的对应的字段类型不一致，会抛出异常
            $topicOrderCommentModel-> save();
            TopicOrderCommentModel::commit();
        } catch(\Exception $error) {
            TopicOrderModel::rollback();
            TopicOrderCommentModel::rollback();
            echo '回滚了';
        }