Refresh object in Session from Database Hibernate

Question

Hibernate, as I know updates the Database once the attached Objects in the session's value changes. Is there a way to obtain a fresh copy from the database and reattach the fresh copy discarding the changed object?

Below is an object I obtained from Querying the Database using Hibernate.

Rtpmast rtpmast = (Rtpmast) iterator.next();

Once executed the below code

rtp.setRptval1(promotionMethod.getType());

Hibernate registers that the the object has changed. And when I commit a transaction later on or query the Database the Session is flushed?

What I want is to temporally update the Rtpmast object and discard the changed object later.

I found the lead - Hibernate evict() method

Chan
– Chan

2012-04-24 06:32:21 +00:00
Commented Apr 24, 2012 at 6:32 — Chan
– Chan, Commented Apr 24, 2012 at 6:32

Ross · Accepted Answer · 2015-03-17 05:55:51Z

5

Hibernate, as I know updates the Database once the attached Objects in the session's value changes.

Actually,Hibernate updates the database only after invoking session.save(...), session.delete(...) etc. methods. If you're in a transaction you'd also have to commit changes.

What you want is either use evict() and re-query the object, as you've mentioned, or detach the instance you're working on, which means you need to close() the Session (there are other, less trivial, ways to do so as mentioned here).

edited Mar 17, 2015 at 5:55

Ross

1,03314 silver badges32 bronze badges

answered Apr 24, 2012 at 6:42

yair

9,2954 gold badges36 silver badges53 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Chan Over a year ago

Oh thanks... Do I need to close() the session to detach the object?

yair Over a year ago

That's one of the typical ways.

Collectives™ on Stack Overflow

Refresh object in Session from Database Hibernate

1 Answer 1

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related