avax.persistence.PersistenceException: org.hibernate.id.IdentifierGenerationException: attempted to assign id from null one-to-one property [org.hibernate.test.MapsIdTestCase$Bar.foo]
at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:154)
at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:181)
at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:188)
at org.hibernate.internal.SessionImpl.fireMerge(SessionImpl.java:935)
at org.hibernate.internal.SessionImpl.merge(SessionImpl.java:894)
at org.hibernate.engine.spi.CascadingActions$6.cascade(CascadingActions.java:261)
at org.hibernate.engine.internal.Cascade.cascadeToOne(Cascade.java:471)
at org.hibernate.engine.internal.Cascade.cascadeAssociation(Cascade.java:396)
at org.hibernate.engine.internal.Cascade.cascadeProperty(Cascade.java:197)
at org.hibernate.engine.internal.Cascade.cascade(Cascade.java:130)
at org.hibernate.event.internal.DefaultMergeEventListener.cascadeOnMerge(DefaultMergeEventListener.java:441)
at org.hibernate.event.internal.DefaultMergeEventListener.entityIsPersistent(DefaultMergeEventListener.java:183)
at org.hibernate.event.internal.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:157)
at org.hibernate.event.internal.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:65)
at org.hibernate.internal.SessionImpl.fireMerge(SessionImpl.java:902)
at org.hibernate.internal.SessionImpl.merge(SessionImpl.java:888)
at org.hibernate.test.MapsIdTestCase.lambda$mainTest$1(MapsIdTestCase.java:88)
at org.hibernate.testing.transaction.TransactionUtil.doInHibernate(TransactionUtil.java:318)
at org.hibernate.test.MapsIdTestCase.mainTest(MapsIdTestCase.java:78)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.hibernate.testing.junit4.ExtendedFrameworkMethod.invokeExplosively(ExtendedFrameworkMethod.java:45)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
at org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:298)
at org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:292)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.lang.Thread.run(Thread.java:745)
Caused by: org.hibernate.id.IdentifierGenerationException: attempted to assign id from null one-to-one property [org.hibernate.test.MapsIdTestCase$Bar.foo]
at org.hibernate.id.ForeignGenerator.generate(ForeignGenerator.java:90)
at org.hibernate.event.internal.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:123)
at org.hibernate.event.internal.DefaultMergeEventListener.saveTransientEntity(DefaultMergeEventListener.java:236)
at org.hibernate.event.internal.DefaultMergeEventListener.entityIsTransient(DefaultMergeEventListener.java:216)
at org.hibernate.event.internal.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:154)
at org.hibernate.internal.SessionImpl.fireMerge(SessionImpl.java:924)
... 30 more
