Ну, я должен был догадаться, как выглядит ваша Role сущность, поэтому приведу полные примеры. Вы не указали, используете ли вы Spring-Data-Jpa или просто Jpa, так что кто знает. Отредактируйте: в своих примерах вы наконец-то пояснили, что используете spring-data-jpa, но в любом случае понятия те же, что и здесь.
@Data
@ToString
@Entity
@Table(name = "roles")
public class Role {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
@ManyToMany(mappedBy="roles")
@ToString.Exclude
@EqualsAndHashCode.Exclude
private Set<User> users = new HashSet<>();
}
и использовать
tx.begin();
User u1 = new User();
Role r1 = new Role();
u1.setRoles(Collections.singleton(r1));
Movie m1 = new Movie();
m1.setDescription("movie 1");
Movie m2 = new Movie();
m2.setDescription("movie 2");
u1.setMovies(Stream.of(m1, m2).collect(Collectors.toSet()));
em.persist(u1);
tx.commit();
// now to query
em.clear();
tx.begin();
User u = em.createQuery("from User u left outer join fetch u.movies where u.id = 1", User.class).getSingleResult();
Movie m = u.getMovies().stream().filter(mv->mv.getDescription().equals("movie 1")).findFirst().get();
u.getMovies().remove(m);
em.remove(m);
tx.commit();
и это создает журнал
create table users (id bigint generated by default as identity (start with 1), password varchar(255), username varchar(255), primary key (id))
create table users_movies (user_id bigint not null, movie_id bigint not null, primary key (user_id, movie_id))
create table users_roles (user_id bigint not null, role_id bigint not null, primary key (user_id, role_id))
alter table users_movies add constraint FKt4hasm7tvj0vor58ql33xptjy foreign key (movie_id) references movies
alter table users_movies add constraint FKhhj9vi206o88q0typfntk3fek foreign key (user_id) references users
alter table users_roles add constraint FKj6m8fwv7oqv74fcehir1a9ffy foreign key (role_id) references roles
alter table users_roles add constraint FK2o0jvgh89lemvvo17cbqvdxaa foreign key (user_id) references users
insert into users (id, password, username) values (default, ?, ?)
insert into movies (id, category, country, description, release_date, title) values (default, ?, ?, ?, ?, ?)
insert into movies (id, category, country, description, release_date, title) values (default, ?, ?, ?, ?, ?)
insert into roles (id) values (default)
insert into users_movies (user_id, movie_id) values (?, ?)
insert into users_movies (user_id, movie_id) values (?, ?)
insert into users_roles (user_id, role_id) values (?, ?)
select user0_.id as id1_2_0_, movie2_.id as id1_0_1_, user0_.password as password2_2_0_, user0_.username as username3_2_0_, movie2_.category as category2_0_1_, movie2_.country as country3_0_1_, movie2_.description as descript4_0_1_, movie2_.release_date as release_5_0_1_, movie2_.title as title6_0_1_, movies1_.user_id as user_id1_3_0__, movies1_.movie_id as movie_id2_3_0__ from users user0_ left outer join users_movies movies1_ on user0_.id=movies1_.user_id left outer join movies movie2_ on movies1_.movie_id=movie2_.id where user0_.id=1
delete from users_movies where user_id=? and movie_id=?
delete from movies where id=?