org.hibernate.TransientObjectException

kash_meu · **Posted:** Mon May 26, 2008 7:33 am

Hi All!

Please help me. I am facing the following problem.

Quote:

org.hibernate.TransientObjectException: object references an unsaved transient instance - save the transient instance before flushing: bloodbank.persistence.Blood
org.hibernate.engine.ForeignKeys.getEntityIdentifierIfNotUnsaved(ForeignKeys.java:216)
org.hibernate.type.EntityType.getIdentifier(EntityType.java:99)
org.hibernate.type.EntityType.isDirty(EntityType.java:216)
org.hibernate.type.TypeFactory.findDirty(TypeFactory.java:412)
org.hibernate.persister.entity.BasicEntityPersister.findDirty(BasicEntityPersister.java:2538)
org.hibernate.event.def.DefaultFlushEntityEventListener.dirtyCheck(DefaultFlushEntityEventListener.java:344)
org.hibernate.event.def.DefaultFlushEntityEventListener.onFlushEntity(DefaultFlushEntityEventListener.java:108)
org.hibernate.event.def.AbstractFlushingEventListener.flushEntities(AbstractFlushingEventListener.java:190)
org.hibernate.event.def.AbstractFlushingEventListener.flushEverythingToExecutions(AbstractFlushingEventListener.java:70)
org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:26)
org.hibernate.impl.SessionImpl.flush(SessionImpl.java:730)
org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:324)
org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:86)
bloodbank.persistence.UserDAO.save(UserDAO.java:44)
bloodbank.action.SaveUserAction.execute(SaveUserAction.java:41)
org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)

SIau_Tie · **Posted:** Mon May 26, 2008 9:27 am

this is because your association object hasn't already saved. Please post the code

Cameron McKenzie · **Posted:** Mon May 26, 2008 12:50 pm

Yes, my guess is that both sides of the relationship have not been saved. Pass both instances to the EntityManater/Session, and you will likely see this error go away.

kash_meu · **Posted:** Mon May 26, 2008 2:51 pm

Thanks for your reply!

How can I do it?
This is what I am trying...

This is my user class that has an object of Blood Type, with its proper getters and setters.

Code:

public class User{
   private String userName;
   private String password;
   private String firstName;
   private String lastName;
        private Blood blood=new Blood();

}

I have DAOs for User and Blood, namely UserDAO and BloodDAO.

At the time of execution, all the properties of the User object are filled.
This line generates the exception.

Code:

new UserDAO().save(saveUserForm);

Please help me! I would be grateful to you

SIau_Tie · **Posted:** Mon May 26, 2008 9:01 pm

just load the Blood from DB which has unique identifier.

For example :

Code:

...
Blood blood = (Blood) session.load(Blood.class, 1L);
User user = new User();
....
user.setBlood(blood);
new UserDAO().save(user);

SIau_Tie · **Posted:** Mon May 26, 2008 9:02 pm

just load the Blood from DB which has unique identifier.

For example :

Code:

...
Blood blood = (Blood) session.load(Blood.class, 1L);
User user = new User();
....
user.setBlood(blood);
new UserDAO().save(user);

kash_meu · **Posted:** Tue May 27, 2008 1:49 am

Thanks Slau!

The problem here is that I have to save the Blood information encapsulated in the user object. I don't have to read it from database, I just have to save the user that has blood information in it.