[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-5938) Entities with compound primary keys are not properly handled when querying metamodel and using Criteria API

Entities with compound primary keys are not properly handled when querying metamodel and using Criteria API ----------------------------------------------------------------------------------------------------------- Key: HHH-5938 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-5938 Project: Hibernate Core Issue Type: Bug Affects Versions: 3.6.0 Reporter: Jaroslaw Lewandowski Suppose we have entity defined like this: {code} @Entity class Foo { @Id Long first; @Id Long second; .... } {code} Then the following code will fail: {code} Metamodel mm = entityManager.getMetamodel(); EntityType<Foo> foo_ = mm.entity(Foo.class); foo_.getSingularAttribute("first", Long.class); foo_.getSingularAttribute("second", Long.class); {code} The same problems exists trying to query this entity: {code} CriteriaBuilder cb = entityManager.getMetamodel(); CriteriaQuery<Foo> cq = cb.createQuery(Foo.class); Root<Foo> foo = cq.from(Foo.class); cq.where(cb.equal(foo.get("first"), 1L), cb.equal(foo.get("second"), 2L)); {code} See that attributes are accessed by name. In the first example IllegalArgumentException is thrown in second NPE