This week's giveaway is in the EJB and other Java EE Technologies forum. We're giving away four copies of EJB 3 in Action and have Debu Panda, Reza Rahman, Ryan Cuprak, and Michael Remijan on-line! See this thread for details.
I am using hibernate, jpa 2.0, I can persist a OneToMany relationship ok but can't update it (by adding a new element), I have tried many methods and get 1 of two errors each time, "can't insert null into user_id" or "UserRoles is transient persist first". There seems to be no way to do this, are my annotations wrong. It seems it wants me to persist user roles first but if I try it tells me user_id can not be null, but I can't set user id only user object???