[hibernate-issues] [Hibernate-JIRA] Created: (HHH-7213) Hibernate throws a "MappingException: Repeated column in mapping for collection" on order columns also being a foreign key/relationship column
Hibernate throws a "MappingException: Repeated column in mapping for collection"
on order columns also being a foreign key/relationship column
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Key: HHH-7213
URL: https://hibernate.onjira.com/browse/HHH-7213
Project: Hibernate ORM
Issue Type: Bug
Affects Versions: 4.1.1
Reporter: Karsten Wutzke
I'm using an order column for an @OrderColumn which is also part of a foreign key
like:
{code}@ManyToMany
@JoinTable(name = "GroupLinks", joinColumns = {@JoinColumn(name =
"parent_round_id", referencedColumnName = "round_id"),
@JoinColumn(name = "parent_ordinal_nbr", referencedColumnName =
"ordinal_nbr")}, inverseJoinColumns = {@JoinColumn(name =
"child_round_id", referencedColumnName = "round_id"), @JoinColumn(name
= "child_ordinal_nbr", referencedColumnName = "ordinal_nbr")})
@OrderColumn(name = "child_ordinal_nbr")
private List<Group> children;{code}
As you can see the order column "child_ordinal_nbr" is also an FK (and PK) in
the join table. However, this fails with a mapping exception:
{code}Caused by: org.hibernate.MappingException: Repeated column in mapping for
collection: com.kawoolutions.bbstats.model.Group.parents column: parent_ordinal_nbr
at org.hibernate.mapping.Collection.checkColumnDuplication(Collection.java:340)
at org.hibernate.mapping.Collection.checkColumnDuplication(Collection.java:363)
at org.hibernate.mapping.Collection.validate(Collection.java:320)
at org.hibernate.mapping.IndexedCollection.validate(IndexedCollection.java:89)
at org.hibernate.cfg.Configuration.validate(Configuration.java:1291)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1729)
at
org.hibernate.ejb.EntityManagerFactoryImpl.<init>(EntityManagerFactoryImpl.java:84)
at
org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:904)
... 9 more{code}
IMO there's no reason to assume the order column is not a foreign key column, too.
I've posted an extensive example over at stackoverflow.com:
http://stackoverflow.com/questions/9957247/is-manytomanymappedby-ordercol...
While the JPA spec is silent about this behavior there's no reason why the depicted
scenario shouldn't be working.
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