Select record where id is one of collection id - mysql

Question

In a spring mvc application i have 3 database tables (including one mapping table) and their 2 corresponding java entities.
The entities are:-
public class User {
private Long id;
private String userName;
#ManyToMany(fetch = FetchType.EAGER)
#JoinTable(name = "user_location",
joinColumns = {#JoinColumn(name = "user_id", referencedColumnName = "id")},
inverseJoinColumns = {#JoinColumn(name = "location_id", referencedColumnName = "id")}
)
private Set<Location> location;
}
public class Location {
private Long id;
private String locationCode;
}
Three tables are users, location and user_location.
I want to select a user whose location id is equal to a particular id.
Since user can have multiple locations i am not sure how to write a hibernate query for this. I tried few combinations below but i am either getting a exception,
illegal attempt to dereference collection [{synthetic-alias}{non-qualified-property-ref}] with element property reference [id]
or getting a list of User and Location objects. i just want a list of user objects.
from User where userName = :userName and :locationId in (location.id)
from User user inner join user.location loc where user.userName = :usersName and loc.id = :locationId
Update:
I tried query,
Query query = getCurrentSession().createQuery("from User user inner join user.location loc where user.userName = :usersName and loc.id = :locationId");
Hibernate generates following plain SQL from above query and returns a list of User and Location objects. For example if there is one location for an user that matches above query hibernate returns a list that contains one User and one Location object.
select
user0_.id as id1_18_0_,
location2_.id as id1_5_1_,
user0_.user_name as user_na11_18_0_,
location2_.location_code as location3_5_1_
from
users user0_
inner join
user_location location1_
on user0_.id=location1_.user_id
inner join
location location2_
on location1_.location_id=location2_.id
where
user0_.user_name=?
and location2_.id=?

Answer 1

You could try to use next criteria:
Criteria criteria = getCurrentSession().createCriteria(User.class, "u");
criteria.createAlias("location", "loc");
criteria.add(Restrictions.eq("u.userName", "userName");
criteria.add(Restrictions.eq("loc.id", locationId);
List<User> users = criteria.list();
Or you could try HQL typed query:
TypedQuery<User> query =
getCurrentSession().createQuery("SELECT User.* FROM User u JOIN user_location ul ON u.id = ul.user_id JOIN Location l ON ul.location_id = l.id WHERE u.userName = :userName AND l.id = :locationId", User.class)
.setParameter("userName", "userName")
.setParameter("locationOd", locationId);
List<User> users = query.getResultList();