映射异常: An association from the table tb_baoxiao refers to an unmapped class: int

最新推荐文章于 2019-06-16 06:27:52 发布
原创 最新推荐文章于 2019-06-16 06:27:52 发布 · 5.9k 阅读 · 0 ·
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文章标签：

#class #table #user

本文介绍了一个常见的ORM配置问题，即在进行多对一关联时，容易忽略class属性而导致的错误。通过具体示例展示了正确的配置方式。

关联时，要注意：

<many-to-one name="user_id" column="user_id" class="dbTable.TbUser"></many-to-one>

不能忘记class，否则出题目所示错误。

关于An association from the table refers to an unmapped class
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1,检查你的hibernate.cfg.xml文件中是否添加了   2,检查你的hibernate.cfg.xml文件中的相关联的两个的顺序，可能有其中一个需要引用另一个， 但是另一个却还没有编译，就是说被用作外键的表要放在前面 3,检查你的*.hbm.xml文件名是否正确 4, 检查你的*.hbm.xml里面类全名，,区分大小写
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WITH aa AS ( SELECT a.shop_id, IF ( a.shop_id = 1000000000, "合生和总部",( SELECT s.NAME FROM shop_info s WHERE s.id = a.shop_id )) AS shopName, SUM( a.baoxiao_money ) AS sumMoney, COUNT( a.id ) AS baoxiaoCount FROM t_baoxiao a LEFT JOIN sys_user su ON a.user_id = su.user_id WHERE a.delmark = 1 AND a.shop_id != 0 GROUP BY a.shop_id ) SELECT *, ( SELECT SUM( aa.baoxiaoCount ) FROM aa ) AS baoxiaoSum FROM aa GROUP BY aa.shop_id ORDER BY sumMoney DESC
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使用了 CTE（Common Table Expression，公共表表达式）`aa` 进行初步的数据处理，在 `aa` 中，从 `t_baoxiao` 表左连接 `sys_user` 表，筛选出 `delmark` 为 1 且 `shop_id` 不为 0 的数据，按 `shop_id` 分组，计算...
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