I'm having a weird issue with Hibernate. Not sure ...

# hibernate

[David Kubecka]

I'm having a weird issue with Hibernate. Not sure whether it's Kotlin specific but it seems to be quite generic so I guess Java guys would already complain 🙂

I have this in my BaseEntity (from which all other non-embeddable entities in my model inherit):

@Id
    @GeneratedValue
    var id: Long? = null

A framework I'm currently integrating would benefit from having the annotations on the getters instead of fields so I did this:

@get:Id
    @get:GeneratedValue
    var id: Long? = null

Once I do that (and only that) I run into really weird Hibernate errors on the app startup, e.g. Could not locate setter method for property [com.vacuumlabs.robo.backend.entities.Money#amount]. Well, Money#amount is indeed just a val but how is that related to moving the @Id annotation to the getter? Moreover, Money is exactly an embeddable entity that does not inherit from BaseEntity ...

Okay, so I switch it to var and I get another error (from complete different entity): Unable to create unique key constraint (client_id, iban) on table account: database column 'client_id' not found. But of course the client_id column is there and if I switch the @Id back to the property annotation then my app starts and runs ok.

I'm afraid I might be running into some generic issue here. Did anyone else encounter this?

[Dirk Luijk]

We have the exact same issue after we upgraded to hibernate 6 with Spring Boot 3. Were you able to resolve it? It seems to be a specific issue when using inheritance…

[David Kubecka]

I eventually learned it is caused by how the access strategy is defined in Hibernate: https://thorben-janssen.com/access-strategies-in-jpa-and-hibernate/. Quite a weird implicit stuff if you ask me 🙂