使用休眠条件将“投影”字段设置为休眠状态中的外键列

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"));