解决 There is no getter for property named ‘null‘ in ‘class 报错

1. 问题

mybatis-plus在更新删除操作时报错
Closing non transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@750ee72a]
2024-06-08 21:03:07 [http-nio-8080-exec-3] ERROR o.a.c.c.C.[.[.[.[dispatcherServlet] - Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.reflection.ReflectionException: There is no getter for property named ‘null’ in ‘class hero.mps.web.sys_menu.entity.SysMenu’] with root cause
org.apache.ibatis.reflection.ReflectionException: There is no getter for property named ‘null’ in ‘class hero.mps.web.sys_menu.entity.SysMenu’

2. 报错原因

在使用MyBatis-plus自带的删除和更新方法时，它都是通过ID来进行删除和更新，而我们的实体类没有id这个字段。

3.解决方案

在我们的实体类主键字段上加一个@TableId注解

如果实体类主键属性名为id无需加此注解