Hi,
I am running a test web application using a Spring,Hibernate,Struts. I have a table without any PrimaryKeys. But the The whole record is Unique.
Table has 3 records like this.

4545 9595 1234 James Yes
4545 9595 1234 John NoValue2
4545 9595 1234 Bobby NoValue2

I have fetched the record and displayed in JSP and selected middle record for edit. Then I have updated all fileds except first one(4545)

Ex: 4545 9595 1234 John NoValue2
Now it is : 4545 8888 7777 Mitch Developer

I am setting the values to a "Data" object and passing it method in "HibernateSupport" class called "getHibernateTemplate().update(data)getHibernateTemplate().update(data);;"

It does not throw exception and it did not updated the record.

I tried with getHibernateTemplate().saveOrUpdate(data) also. But no luck.

Here is my Mapping file

<hibernate-mapping package="com.test.model">
<class name="Data" table="apenodeproperties">
<composite-id >
<key-property name="sceneid" column="SCENEID" type="long"></key-property>
<key-property name="personid" column="PERSONID" type="long"></key-property>
<key-property name="nodeid" column="NODEID" type="long"></key-property>
<key-property name="name" column="NAME" type="java.lang.String"></key-property>
<key-property name="value" column="VALUE" type="java.lang.String"></key-property>
</composite-id>
</class>
</hibernate-mapping>

The question is : How this support class know which record I updated ?.
How to resolve this issue?.
I thout to pass actual values to the DAOHelper and search the record based on old values then update that object with new values but...here I am making two calls to DB.

Ant thouts will be appreciated.

Thanks

Try adding this line in the initDao() method of you HibernateDaoSupport subclass:

getHibernateTemplate().setFlushMode(HibernateTemplate.FLUSH_EAGER);

If you don't have primary key and change value of composite key, how can Hibernate deduce which one of the objects you want to update? Original session was closed, and new one don't have reference to your object.

You can use the following sequence while processing update:

1) Open transaction
2) Retrieve old object using old values
3) Update old object with new values
4) Commit transaction - changes should be saved now, because at this time session have reference to changed object.

But better design would be using surrogate primary key.

pkulka,

Here is my DAO support class. But I don't have init() method.

public class DataDAOHibernate extends HibernateDaoSupport implements DataDAO {

/* (non-Javadoc)
* @see com.amfam.lifewkfl.dao.DataDAO#saveData(com.amfam.lifewkfl.model.Data)
*/
public void saveData(Data data) {
try{
getHibernateTemplate().update(data);
System.out.println("I am here ...");
}catch (DataAccessException e) {
e.printStackTrace();
}

}

/* (non-Javadoc)
* @see com.amfam.lifewkfl.dao.DataDAO#searchData()
*/
public List searchData() {
List list = new ArrayList();
try {
Query q =
getSession().createQuery("from Data d where d.sceneid=4545");
list = q.list();


} catch (HibernateException e) {
e.printStackTrace();
}
return list;

}

}
Where should I put this line ?
getHibernateTemplate().setFlushMode(HibernateTemplate.FLUSH_EAGER);

sergeya,

What you have explained is my least opetion, Cause I have to send old values from Struts Action to all the way back to DAOSupport then fetch the data with old values and update which I already mentioned in my thread that it will be two call to DB and trying to find other ways :). But this is a general scenarion, every one does like this ? I mean making calles two times for edit ?

Thanks
Sudhakar

If you have secondary cache, then getting object by key not nessary resulted to query, but, if you didn't want select in any case, you may try following scenario:

1) Pass original unmodified object to lock method - this will associate object with session without query.
2) Modify object with new values.
3) Commit transaction

See http://www.hibernate.org/hib_docs/v3/reference/en/html/objectstate.html#objectstate-detached