Hello everybody.
I'm learning Hibernate, and I found something so strange when using version checking in Hibernate.
When I get, load, or select an object from database, although I don't modify it, the session is always marked dirty. So when I commit the transaction, the version of that row is increased.
I think this is an error.
This is my code:
------------------------------------------------------------
Session session = sessionFactory.openSession();
Transaction tx = session.beginTransaction();

TestDepartment department =
(TestDepartment)session.get(TestDepartment.class, new Long(1));

tx.commit(); //the version of department is increased after this line.
session.close();
------------------------------------------------------------

And this is the hbm.xml file:

<class
name="generated.de.TestDepartment"
table="TEST_DEPARTMENT"
schema="INDEXATION"
dynamic-update="true"
lazy="false">

<id name="departmentId" type="long">
<column name="DEPARTMENT_ID" scale="0" />
<generator class="native" />
</id>

<version
name="version"
column="VERSION"
unsaved-value="null">
</version>

<property name="name" type="string">
<column name="NAME" />
</property>
</class>
Can you tell me why. Did I make any mistakes?

Check that your not doing something wrong in the domain object.

Can you explain it more clearly? I'm just a newbie.
Thanks any way.

If your domain object is coded incorrectly it can result in a dirty status so an update will occur. This is not so uncommon for beginners when they are cut-and-pasting setters/getters but forget to change the field reference. For example, two setters refer to the save private field so when the object is loaded Hibernate sets the fields which internally the POJO is changed when the state is checked. Hope this is clear.

Hi,

Although I don't know why you are facing this issue, I am sure the hibernate logs would atleast get us started with figuring it out. Can you attach them here ?