Search code examples
javajpapersistencepersist

EntityManager em.remove() and em.persist() not reflected in same context while changes in Entity are reflected

I am calling a 

 SomeEntity someEntity = em.find(EntityPK.Class,entityPK);
 em.Remove(entityPK);

and then persist on same primary key

 em.persist(someEntity)

SQLIntegrityContraintViolatinException is thrown that entity with primary key already exist.

while if I changes 

someEntity.setName("Test");

and then gets the same entity back with 

someEntity = em.find(EntityPK.Class,entityPK);

it gives me back updated someEntity with 

 someEntity.getName()

returns 'Test'.

Changes in the someEntity are reflected while its removal is not reflected.

I am new to the JPA and any help would be appreciated.

Solution

  • Reincarnating objects is normally not a good idea. It is better to use a new id for a new object, such as a generated id.

    If you must reincarnate and object, try doing it in a separate transaction, or at least call flush() after the remove to delete it from the database first.