Hey,

I'm using the ' unsaved-value="0" ' setting within my mapping file. In the code I'm getting a user object that exists from database. When I change a property (for example online=1) and then use ' getHibernateTemplate().save(user); ', the user is not updated but inserted with a new ID as a new entry in the database.

I debugged the code and everything seems to be okay. The user I get from the database has its ID other than 0. So why does Hibernate create a new entry?

Hibernate version: 3

Mapping documents:
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="de.tfhberlin.eclipsophone.server.beans" auto-import="true">
<class name="User" table="User" lazy="false">
<id name="id" column="id" type="long" unsaved-value="0">
<generator class="native"/>
</id>
<version name="version" column="version" unsaved-value="negative"/>
<property name="name" column="name" type="string"/>
<property name="password" column="password" type="string"/>
<property name="ipaddress" column="ipaddress" type="string"/>
<property name="enabled" column="enabled" type="int"/>
<property name="online" column="online" type="int"/>
<set name="subscribed_groups" table="UserGroup" inverse="true" lazy="false">
<key column="user_id"/>
<many-to-many class="Group" column="group_id"/>
</set>
<set name="offlinemessages" table="OfflineMessage" lazy="false">
<key column="receiver_userid"/>
<one-to-many class="OfflineMessage"/>
</set>
</class>
</hibernate-mapping>

Ok, the problem was save(). I have to use saveOrUpdate() -.-