org.hibernate.TransientObjectException: object references an unsaved transient instance
来源:互联网 发布:js 0除以0 nan 编辑:程序博客网 时间:2024/05/22 00:42
异常1:not-null property references a null or transient value
解决方法:将“一对多”关系中的“一”方,not-null设置为false
(参考资料:http://www.thearcmind.com/confluence/pages/viewpage.action?pageId=212)
异常2:org.hibernate.TransientObjectException: object references an unsaved transient instance
解决方法:cascade="save-update,persist"
(参考资料:http://www.laliluna.de/254.html)
异常3:org.hibernate.QueryException: could not resolve property
解决方法:"from Category category where category.userID = :userID"修改为"from Category category where userID = :userID"或者"from Category category where category.user.id = :userID"
(参考资料:http://www.laliluna.de/277.html)
异常4:could not initialize proxy - the owning Session was closed
解决方法:设置lazy为false
(参考资料:http://forum.springframework.org/showthread.php?t=27993)
异常2我在应用中碰到了这样的问题:
有三个表:userInfo deptmentInfo role
userInfo 与deptmentInfo为many to one
userInfo 与role为many to one
下面为保存UserInfo对象时的代码:
DeptmentInfo dept = new DeptmentInfo();
dept.setDeptName(deptName);
Role role = new Role();
role.setRoleName(roleName);
UserInfo user = new UserInfo();
user.setUserName(userName);
user.setUserSex(userSex);
user.setDuty(duty);
user.setPhone(phone);
user.setMobileNum(mobileNum);
user.setEmail(email);
user.setQq(qq);
user.setMsn(msn);
user.setAdress(adress);
user.setDeptmentInfo(dept);
user.setRole(role);
dao.save(user);
执行时有错:org.hibernate.TransientObjectException: object references an unsaved transient instance
于是改了UserInfo.hbm.xml的一些地方
如下:
<many-to-one name="role" class="com.oa.domain.Role"
cascade="save-update,persist" fetch="select">
<column name="ROLE_ID" precision="22" scale="0" />
</many-to-one>
<many-to-one name="deptmentInfo"
class="com.oa.domain.DeptmentInfo" cascade="save-update,persist"
fetch="select">
<column name="DEPT_ID" precision="22" scale="0" />
</many-to-one>
加了上面红色部分的,就OK了,能保存了。
本文转载自:http://hi.baidu.com/wl858621/blog/item/741446d7f3a420d8a144dfdd.html/cmtid/4b83ee0ff6931fe4ab6457fa
- org.hibernate.TransientObjectException: object references an unsaved transient instance
- org.hibernate.TransientObjectException: object references an unsaved transient instance
- org.hibernate.TransientObjectException: object references an unsaved transient instance
- org.hibernate.TransientObjectException: object references an unsaved transient instance
- 关于org.hibernate.TransientObjectException: object references an unsaved transient instance
- org.hibernate.TransientObjectException: object references an unsaved transient instance
- org.hibernate.TransientObjectException: object references an unsaved transient instance
- org.hibernate.TransientObjectException: object references an unsaved transient instance
- org.hibernate.TransientObjectException: object references an unsaved transient instance
- Hibernate 级联保存TransientObjectException object references an unsaved transient instance
- Hibernate错误,org.hibernate.TransientObjectException: object references an unsaved transient instance
- org.hibernate.TransientObjectException: object references an unsaved transient instance - save the t
- Caused by: org.hibernate.TransientObjectException: object references an unsaved transient instance -
- org.hibernate.TransientObjectException: object references an unsaved transient instance - save the t
- Caused by: org.hibernate.TransientObjectException: object references an unsaved transient instance -
- net.sf.hibernate.TransientObjectException: object references an unsaved transient instance - save the transient instance before
- hibernate关联问题, org.hibernate.TransientObjectException: object references an unsaved transient instan
- org.hibernate.TransientObjectException: object references an unsaved t...
- 克波拉里客户管理系统助企业“强身健体”
- 代码优化的第一步是判定程序热点
- 光驱,软驱,USB的禁用和启用
- get url from plugin
- 关于多线程编程
- org.hibernate.TransientObjectException: object references an unsaved transient instance
- 遭遇ORA-12514: TNS:listener does not currently know of service requested in connect descriptor
- 怎样删除WORD文档中的所有超链接
- 解决浏览器缓存和中文乱码问题
- 关于估价函数的实现-------基于python语言(网络爬虫)
- xls文档的读写改(使用的jxl版本是2.6.8)
- 关于XML解析的测试
- JS万年历
- rmi