is it a must to have id for each mapping file ?

Good day to all,

i'm newbie to hibernate, my question is do we really need to have a generator id for each database table for mapping ?

also, what are the best generator id strategy in hibernate ?

thank you very much for guidance

Yes you must have an id to uniquely identify the object to one and exactly one record/row/tuple in the database.

I usually choose auto for the generation type to allow Hibernate to just use the underlying databases generation type, this leaves you code generic enough for switching out databases.

Mark

Mark, i assume auto generate means by increment ?

Originally posted by Nakata kokuyo:
Mark, i assume auto generate means by increment ?

No, actually in the mapping file it is called "native" in JPA it is called Auto. "increment" works with MySql, but not Oracle which would need "sequence", but if I had "native" then it covers both MySql and Oracle because the dialect will tell which one the vendor natively uses.

Mark

Cool Mark, thanks for the guidance