我有这Entity门课：
@Entity
public class Registered implements Serializable {
@Id
public RegisteredId id;
}
有了这个EmbeddedId：
@Embeddable
public class RegisteredId implements Serializable {
@ManyToOne
public User user;
@ManyToOne
public Tournament tournament;
}
我正在尝试获取Criteria query和User，Tournament因为我需要读取它们的一些属性：
CriteriaBuilder builder = em.getCriteriaBuilder();
CriteriaQuery<Registered> criteria = builder.createQuery(Registered.class);
Root<Registered> root = criteria.from(Registered.class);
root.fetch("id.user", JoinType.LEFT);
root.fetch("id.tournament", JoinType.LEFT);
criteria.where(builder.equal(root.get("id.tournament.id"), idTournament));
List<Registered> registereds = em.createQuery(criteria).getResultList();
但我收到一个错误：
Execution exception[[CompletionException: java.lang.IllegalArgumentException: Unable to locate Attribute with the the given name [id.user] on this …