Hi
I have a basic question(being newbie to hibernate)
I use hibernate to load Objects from Database. Once I load the object with let's say 10 attributes, how do I reset the value of few of those attributes?
If I call the setter method and pass null, that works but when I commit, the actual values in the database are not getting reset.
Is there a flag I should set for these kind of situations?

Thx
Ravi

What do you mean by reset? Changed to some default value, or changed to what they were before some recent in-memory updates?

Hibernate doesn't provide a way to do either of these things. You have to know the default values yourself, and you have to manually undo changes or rollback transactions if you need to.

You can use session.refresh(object) to reject all changes in object (i.e. get the current DB values back into the object), then re-make all the "correct" changes. But the best plan is to only make "correct" changes in the first place. One way of doing this is to construct an in-memory version of the relevant object and make your changes to it. When you're ready to save, copy the "correct" changes to the persistent version of the object, and save that.

Hi
Let's say I have a Object X(and table) with following attributes
Integer A (Primary Key)
Integer B
String C
String D
....

Let's say that all the values are populated and not null.
I load this object from database using Hibernate in a Tx. Make changes so that C is set to null and D is set to null. When I commit the Tx, I expect Hibernate to reset these values in the database to be null(for that particular row). That doesn't seem to happen. But if I change the values of C and D to different value, those get updated just fine in the database.
How do I reset values for Attributes C and D since setting them to null doesn't seem to work.

Thx
Ravi

Setting them to null certainly works in most cases. The only way I can think of to get that to happen is to set dynamic-insert="true" and/or dynamic-update="true" on your class mapping. If you've done that, remove it.