Using Hibernate Criteria set Projection field as Foreign key column in the hibernate

Question

How to set the projection filed as the foreign key reference in the hibernate criteria query.Example like,

 Criteria crt = s.createCriteria(UsersforGrades.class).createCriteria("id", "id1").createCriteria("id1.userId", "id2").add(Restrictions.eq("id2.userId", ue.getUserId()));
                ProjectionList proList = Projections.projectionList();
                proList.add(Projections.property("gradeId.gradeId"));

Exception:

org.hibernate.QueryException: could not resolve property: gradeId of: com.treamis.entity.UserEntity

Answer 1

Late answer although: (Came up with the same scenario)

In such case you need to create alias.

criteria.createAlias("gradeId", "gradeId");
criteria.setProjection(Projections.property("gradeId.gradeId"));