I have been trying to setup a polymorphic relationship between some of the entities in a Spring Boot project for my employer. I recently updated the project to Spring Boot 3 so I could start using Hibernate 6’s improved custom collections. That’s working perfectly, but now I’m getting failures when …

For anyone who finds this page, this was fixed it in Hibernate 6.2.4.Final . I updated my test case with… implementation 'org.hibernate.orm:hibernate-core:6.2.4.Final' …and it works. I also updated it to use Spring Boot 3.1.1, which uses Hibernate 6.2.5.Final, and it works too. @beikov , thanks for…

Yes, I saw that other post, however it doesn’t indicate for sure they are using Spring. I’ll reply to that one with a link to this comment. I have created two repositories on GitHub containing the sample projects I mentioned above. One is using Spring Boot 2.7.11 (Hibernate 5.6.15.Final) while the …

We’d really need a reproducer that works without Spring, otherwise this could take a lot longer.

I went ahead and built a project to try and reproduce the error without Spring Boot. I could not: GitHub - dirkniblick/polymorphWithoutSpringboot The gradle test --info passed just fine. I pushed this over to the Spring Boot folks , but now I’m not sure how that other ticket is producing this erro…

AFAICS from the stack trace, Spring uses EntityManager.merge() but your test uses persist. Try changing that on this line: polymorphWithoutSpringboot/HibernatePolymorphApplicationTests.java at develop · dirkniblick/polymorphWithoutSpringboot · GitHub

Here’s the save method executed by the saveAndFlush method on a Spring Repository: /* * (non-Javadoc) * @see org.springframework.data.repository.CrudRepository#save(java.lang.Object) */ @Transactional @Override public <S extends T> S save(S entity) { Assert.notNull(entity, "Entity must…

Then I don’t know what is going on. At least the stack trace you posted shows that merge is called.

I’m trying to post a reply but they keep disappearing when I hit the Reply button…

Oh, yes, I’m sorry. That stacktrace was from my original application which was doing a merge. Here’s a stacktrace from Spring Boot 3 example project trying to save a new @Any entity: Cannot invoke "org.hibernate.metamodel.mapping.AttributeMapping.getAttributeMetadataAccess()" because the return val…

When saving a new @ManyToAny, the stacktrace is identical except for this: ... at org.hibernate.metamodel.mapping.internal.DiscriminatedAssociationMapping.generateFetch(DiscriminatedAssociationMapping.java:330) at org.hibernate.metamodel.mapping.internal.DiscriminatedCollectionPart.generateFetch(…

@Any and @ManyToAny Associations Fail in Spring Boot 3

Hibernate ORM

beikov May 2, 2023, 7:51am 2

A reproducer would be very helpful. Maybe you can attach it to "org.hibernate.sql.results.graph.Fetchable.asAttributeMapping()" is null since that sounds very similar to what you are reporting.

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@Any and @ManyToAny Associations Fail in Spring Boot 3

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