Hi
I have question about updating DB from transient object.This is my flow:

1. Fetch Object from DB, present SOME of it's fields on web-tier for editing
--end of http and hibernte session
2.On post - create transient instance of object, call hibernate update.

What happens is that my transient object has null values for properties that i don't want the user to modify. And, of-couse, these null values are persisted to DB over "real" values.

What is the right and common solution for this flow?
Do i have to "manually" merge properties of transient object to pesistent(select befor update) instanse ?
Thanks

Transient objects means that they do not exist in the persistent layer (from the database). Hibernate expects it to have a null value for the Id. As my analysis is correct, and unless you used the session.evict(), Hibernate will never update a transient object, instead it creates a new persistent object.

Try LockMode NONE when you try to save the new values.

Transient object is the the object that was created using constructor...