Question

I have a JPA entity Person which has a @Version long version field. I do the following:

<<transaction - begin>>
person.getId() --> == NULL
person.setVersion(1);
em.persist(person);
person.getId() --> returns 1 (this one is generated inside the persist call)
person.getVersion(); --> returns 1
<<transaction - end>>

Now if I check the DB, the version = 2, but the bean incorrectly contains 1.

I see the id of the person entity gets reflected correctly in the person instance. However, the version remains the one before calling persist(). Why?

Answer 1

Maybe you are “outside” the specification borders:

An entity may access the state of its version field or property or
export a method for use by the application to access the version, but
must not modify the version value. Only the persistence provider is
permitted to set or update the value of the version attribute in the
object.

(Quote from JPA specification)