我想通过注释@Query通过Jpa存储库进行连接查询我有三个表。
原生查询是:
select application.APP_ID
from user, customer, application
where user.USE_CUSTOMER_ID = customer.CUS_ID
and application.APP_CUSTOMER_ID = customer.CUS_ID
and user.USE_ID=1;
现在我有了Table Hibernate实体,所以我尝试了ApplicationRepository
@Query(SELECT application FROM Application a
INNER JOIN customer c ON c.customer.id = a.customer.id
INNER JOIN user u ON u.customer.id = c.customer.id
INNER JOIN application a ON a.user.id = u.id
WHERE
u.id = :user.id)
List<Application> findApplicationsByUser(@Param("User") User user);
日志说
意外令牌
请问任何想法?
我的表实体
Application.java:
@Entity
@Table
public class Application extends BaseSimpleEntity {
...
@ManyToOne(optional = false)
private Customer customer;
...
}
Customer.java:
@Entity
@Table
public class Customer extends BaseSimpleEntity {
...
@OneToMany(mappedBy = "customer")
private List<User> users;
@OneToMany(mappedBy = "customer")
private List<Application> applications;
...
}
User.java:
@Entity
@Table
public class User extends BaseSimpleEntity {
...
@ManyToOne(optional = false)
private Customer customer;
...
}
答案 0 :(得分:10)
您在JPA中不需要ON子句,因为JPA已经知道实体如何关联,这要归功于映射注释。
此外,您还要选择application
,这不是您查询中定义的别名。
你的联盟毫无意义。
查询应该只是
select application FROM Application a
join a.customer c
join c.users u
where u.id = :userId
阅读Hibernate文档以了解HQL和连接的工作原理。