Hibernate 嵌入ID上的JPA条件和谓词

我有点麻烦。我正在使用JPA标准进行动态选择（使用标准作为where子句的可选变量…），但我的一个实体有一个EmbeddedId，其中包含用户列，需要检查用户id

这里是我的实体

@Entity
@Table(name = "user_like") 
public class UserLike extends AbstractTimestampEntity implements Serializable {

  @EmbeddedId
   private UserLike.userLikePK userLikePK= new UserLike.UserLikePK();
   ...
   with all the setter and gets
   ...

   @Embeddable
   public static class UserLike implements Serializable{
      @ManyToOne(cascade = CascadeType.DETACH, fetch = FetchType.LAZY)
      @JoinColumn(name = "user_id")
      private User user;

      ... (and an other column, not important for now=
   }   
}

User是包含userId列的其他实体

这就是我的查询

Root<Poi> p = cq.from(Poi.class);
Join<Poi,UserLike> ul = p.join("userLike");


 List<Predicate> predicates = new ArrayList<Predicate>();
 Predicate predicate = cb.like(cb.upper(p.<String>get("name")), "%" + poiName.toUpperCase() + "%");
 predicates.add(predicate);

 Predicate predicate2 = cb.equal(ul.get("userLikePK.user.idUser"), userId);
 predicates.add(predicate);

 //multi select because i need some info from p and ul as well....
 cq.multiselect(p, ul);

---

谢谢

您需要将get链接起来

Predicate predicate2 = cb.equal(ul.get("userLike").get("user").get("idUser"), userId);

Predicate predicate2 = cb.equal(ul.get("userLike").get("user").get("idUser"), userId);