Mybatis级联查询对象为null

记录自己一次二13的过程

SELECT
a.reader AS "Reader",
a.ispay AS "ispay",
location.name AS "Name",
location.position AS "position"
FROM
reading a 
LEFT JOIN location location ON location.number = a.number

在级联查询时 这样在数据库能查到数据。

但是 写到 xml文件中时 就会在查询时。location始终都是null

后来在谦虚求教的情况下知道。

SELECT
a.reader AS "Reader",
a.ispay AS "ispay",
location.name AS "location.Name",
location.position AS "location.position"
FROM
reading a 
LEFT JOIN location location ON location.number = a.number

需要把需要级联的对象一起匹配进去。。

小程序猿。。犯的错都很傻。。。