saveOrUpdate() requires that
(1) the object has an identifier property
(2) the identifier class implements equals() and hashCode()
(3) unsaved-value is set correctly
I recommend that you try enabling logging to see what Hibernate is doing.
If you still can't find a solution, email me a simple main() method and
I will figure out whats wrong very quickly, I'm sure.
[EMAIL PROTECTED]
"Raible, Matt"
<[EMAIL PROTECTED]> To: "'[EMAIL PROTECTED]'"
Sent by: <[EMAIL PROTECTED]>
[EMAIL PROTECTED] cc:
eforge.net Subject: RE:
[Hibernate] Saving Children with composite-id
21/01/03 01:03 PM
Is it possible that saveOrUpdate will not work for the children of this
object, and I have to use update(obj, id) instead? Damn, I thought
hibernate was easy and now it's kicking my ass! It's probably something
super simple and I'm just not seeing it. To re-iterate (I know you guys
hate me by now), here's a brief overview of my code.
** all classes extend from BaseObject with has equals(), hashCode() and
toString() methods.
Parent.java
---
private Long id;
private List children;
+appropriate getters/setters
Parent.hbm.xml
---
<bag role="children" table="CHILDREN" cascade="all">
<key column="parent_id" length="22"/>
<one-to-many class="eg.Child"/>
</bag>
Child.java
---
private ChildId id;
+appropriate getter/setter
ChildId.java
---
private Long parentId;
private Long recordNum;
+ appropriate getter/setters
Child.hbm.xml
---
<composite-id name="id"
class="eg.ChildId"
unsaved-value="none">
<key-property column="parent_id" length="22" name="parentId"
type="long"/>
<key-property column="record_num" length="22" name="recordNum"
type="long"/>
</composite-id>
I am able to retrieve children just fine, but when I try to save the
parent,
hibernate tries to do an insert and I get a unique constraint violation.
I'm calling the following method to save everything:
public Parent saveParent(Parent p) throws DAOException {
storeObject(p);
return (Parent) retrieveObject(eg.Parent.class, p.getId());
}
I got the storeObject method from one of the examples floating around, so
it
could definitely be my problem:
protected void storeObject(Object obj) throws DAOException
{
Session ses = null;
try {
ses = HibernateSession.currentSession();
ses.saveOrUpdate(obj);
ses.flush();
ses.connection().commit();
} catch (Exception e) {
try {
ses.connection().rollback();
} catch (Exception ex) {
e.printStackTrace();
}
;
throw new DAOException(e);
} finally {
try {
HibernateSession.closeSession();
} catch (Exception ex) {
ex.printStackTrace();
}
;
}
}
Thanks,
Matt
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