Hi everybody, maybe I'm not using hibernate so good. I've this situation
using JSF
I have a form that refers to a "A" object.
Now I must reload page when the value of a combo changes. I made that in this way:

<h:selectOneMenu id="myvalues" valueChangeListener="#{backbean.myOnChange}" onchange="document.forms[0].submit();" value="#{backbean.value}">
<f:selectItems value="#{personeEditor.values}"/>
</h:selectOneMenu>

Of course I've lot of inputBoxes referred to "A" fields.
My problems is that when I reload page changing combo value, modifies to "A" object are saved to Database. I don't wanna that. I'd like to save my modify in a temp object and have that after reload but I want decide when to save them on DB (apply button).
Anybody could help me??

My Hibernate ver is 3.0
Bye

First, find out if transactions are for you. Even if things get saved to the DB, if it happens in a transaction you can still roll it back. This is the best solution, as transactions are common to all DB access libraries: the next solution is hibernate-specific.

If there's reasons you can't do that (e.g. there are other objects that you want to update in the same transaction), then you can detach your objects at any time by calling session.evict(obj). Assuming that the problem is that, in your action class, you're doing something likeTo "undo" the changes in the !success block, call session.evict(obj) where the Marker comment is.

You can also evict the object earlier, then use session.merge() instead of session.update() to save the detached object.

I don't know if I'm a brainstone or hibernate documentation is not so clear. However thanks my saver. I understand more things by your 2 posts than by a month of studying.
Bye
Peppe