Java开发网 - 第一次试验hibernate的one-to-many,不成功

Topic: 第一次试验hibernate的one-to-many,不成功

1.第一次试验hibernate的one-to-many,不成功

Posted by: guorui_wh
Posted on: 2004-11-15 11:20

我的环境是spring+hibernate
例子是Forum和Topic的one to many关系,是这样配置的
Forum:
<set name="topics" lazy="false" outer-join="auto" inverse="true"
  cascade="all" sort="unsorted" table="t_bbs_topic">
  <key column="forum_id"></key>
  <one-to-many class="com.bbs.po.hibernatepo.TbbsTopic" />
</set>

Topic:
<many-to-one name="forum"
  class="com.bbs.po.hibernatepo.TbbsForum" column="forum_id"
  outer-join="auto" cascade="none" access="property" update="true"
  insert="true" not-null="true">
</many-to-one>

Test code :

TbbsForum forum = findById(1);
System.out.println("Name:" + forum.getName());
TbbsTopic topic = new TbbsTopic();
topic.setContent("test");
topic.setCreateDate(Function.getSystime());
topic.setCreateUser("guorui_wh");
topic.setId(new Integer(234));
topic.setLastReplyDate(Function.getSystime());
topic.setLastReplyUser("guorui_wh");
topic.setReplyCount(0);
topic.setShowFlag(true);
topic.setTitle("asdfasdf");
topic.setTopFlag(true);

topic.setForum(forum);
forum.getTopics().add(topic);
getHibernateTemplate().save(forum);

2.Re:第一次试验hibernate的one-to-many,不成功 [Re: guorui_wh]	Copy to clipboard
Posted by: guorui_wh Posted on: 2004-11-15 11:22 Exception info: Hibernate: insert into t_bbs_forum (name, master, create_date, create_user, remark, id) values (?, ?, ?, ?, ?, ?) java.sql.BatchUpdateException: Invalid argument value: Duplicate entry '1' for key 1 为什么会是插入到forum 中去呢,我是按照夏昕的hibernate开发指南上一步一步作的

3.Re:第一次试验hibernate的one-to-many,不成功 [Re: guorui_wh]	Copy to clipboard
Posted by: yipsilon Posted on: 2004-12-05 20:45 Topic的key是不是原始类型的? 像int或long这样的? 如果是, 使用Integer或Long替代....

4.Re:第一次试验hibernate的one-to-many,不成功 [Re: guorui_wh]	Copy to clipboard
Posted by: wenyuqiu Posted on: 2004-12-05 23:14 有某个主键重复了吧自己再仔细查查看,