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cant bind a child using mappedby relating to a parent attribute(polymorphism)

Description

This is pseudo class hieracy

@Entity
@Inheritance(strategy = InheritanceType.JOINED)
Mammal
{
@ManyToOne
Person owner;
}
@Entity
Cat extends Mammal

Person{
@Cascade(org.hibernate.annotations.CascadeType.DELETE_ORPHAN)
@OneToMany(cascade = { CascadeType.PERSIST, CascadeType.MERGE,
CascadeType.REMOVE }, mappedBy = "owner")
private List<Cat> cats = new ArrayList<Cat>();

}

it gives the error mission property:
javax.persistence.PersistenceException: org.hibernate.AnnotationException: mappedBy reference an unknown target entity property:
Cat.owner in Person.cats

This is the related thread on hibernate forum:
http://forum.hibernate.org/viewtopic.php?p=2380570#2380570

I can confirm that the same example does work when using OpenJPA as a provider. Please see attached project for reference.

Please do not hesitate me if you have questions.

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2
  • 28 Nov 2011, 11:48 AM
  • 27 Mar 2008, 10:06 AM

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Steve EbersoleMay 11, 2020 at 12:42 PM

Can we stop with these inane “well JPA provider X” does it? I can’t think of any other argument that makes me want to do something less. Either you are claiming Hibernate violates the spec or simply trying some kowtow technique to force to do something I guess? Considering Hibernate passes all JPA TCK tests, hard to be #1.

That said…

I am not able to reproduce this. I took this psuedo-model and was able to use it just fine:

@Entity( name = "Person" ) @Table( name = "persons" ) public static class Person { @Id private Integer id; private String name; @OneToMany( cascade = CascadeType.ALL, mappedBy = "owner" ) private List<Cat> cats = new ArrayList<>(); } @Entity( name = "Mammal" ) @Table( name = "mammals" ) @Inheritance( strategy = InheritanceType.JOINED ) public static class Mammal { @Id private Integer id; private String name; @ManyToOne @JoinColumn( unique = true ) private Person owner; } @Entity( name = "Cat" ) @Table( name = "cats" ) public static class Cat extends Mammal { private boolean polydactyl; } @Entity( name = "Dog" ) @Table( name = "dogs" ) public static class Dog extends Mammal { private boolean akcRecognized; }

So going to need a reproducer.

I looked at this because asked me to. Please open a new issue with a test that actually reproduces this and link it here

Brett MeyerMarch 7, 2014 at 5:30 PM

Bulk closing rejected tickets in "resolved" state.

Webel IT AustraliaNovember 28, 2011 at 11:48 AM

Christian "I think you have embarrassed yourself enough for today. "UML expert", what next..."

Next is a diagram in a compliant UML tool showing Associations from Person to Cat and Person to Dogs, with redefined 'owner' properties at the end, and no triangular relationships anywhere.

Webel IT AustraliaNovember 28, 2011 at 11:11 AM

I do not know how to reopen this issue, could you please reopen it for discussion and triaging.

Christian BauerNovember 28, 2011 at 11:08 AM

I think you have embarrassed yourself enough for today. "UML expert", what next...

Rejected

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Created March 27, 2008 at 10:06 AM
Updated May 11, 2020 at 7:45 PM
Resolved August 1, 2011 at 4:32 PM

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