Hibernate version: 2.1

I have two database tables and they have a parent-child relationship. These tables are called PERSON and ADDR. There can be 0 - many ADDR records for each PERSON record.



In the Person.hbm.xml file I have a set called addrs and I specified "inverse=true".

I have code that looks like the following:



The problem I have is after the above code is run the value of
person.getAddrs() is null. In other words, even though I added the two Addr objects to the database that is not reflected in the addrs Set of the Person object.

Can someone tell me what the problem is here? Can it be rectified by a change in the hbm.xml file? Will I need to restructure my code to support this?

Thanks in advance,

Try committing the transaction. ;)

So you're saying I need to use a Transaction object and perform a commit before the parent object will reflect the fact that I have added child records, right? Currently I am not using a Transaction object but I could change my code to utilize one.

I thought a Session.saveOrUpdate() and then a Session.flush() would take care of that. If performance is not an issue is there any reason not to do a Transaction.commit() after every Session.flush()?

http://hibernate.org/42.html
http://hibernate.org/43.html

And the reference documentation...

OK, what I take from the referenced documentation is, assuming I do not use auto-commit, I should always use beginTransaction() and commit().

To be honest I still don't quite understand why this will take care of my issue. When I look at the API documentation for the Transaction.commit() I see that commit "flushs the associated Session and ends the unit of work." Is the key here "ends the unit of work"?

My situation is a little more complicated than I original stated. The code sample I provided is actually a small part of a larger Transaction. A higher level view of my code is:



The point I want to make is that if I run into a probem and need to rollback I need to rollback a lot more than the code sample provided below. Can I do multiple commits for each beginTransaction()? If so, and I have to do a rollback, will I rollback to the beginTransaction() or to the last commit()?

I appreciate your help. :)