When using Hibernate Session to remove a ManyToOne Child Entity, EntityNotFoundException will raise up.
{code:java}
jakarta.persistence.EntityNotFoundException: deleted object would be re-saved by cascade (remove deleted object from associations): [org.hibernate.bugs.entities.Entity2#2_1 ]
at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:133)
at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:175)
at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:182)
at org.hibernate.internal.SessionImpl.doFlush(SessionImpl.java:1426)
at org.hibernate.internal.SessionImpl.flush(SessionImpl.java:1408)
at org.hibernate.bugs.ORMUnitTestCase.removeEntity2_1(ORMUnitTestCase.java:78)
{code}
If the EntityManager is used instead, *the exception will not be thrown*. Therefore the Session.remove() call has no effect because the entity is saved again via cascading.
ORM Testcase sample based on hibernate-test-case-template can be found here: [ https://github.com/PeRaVs/hibernate-sample|https://github.com/PeRaVs/hibernate-sample]
Look at ORMUnitTestCase.javatestcase () (based on Session class, with EntityNotFoundException raised up)
Look at JPAUnitTestCase.javatest () (based on EntityManager, without EntityNotFoundException)
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