Given:
{code:java}@Table(name = "users")
@Entity
public class UserEntity {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Column(name = "id")
Integer id;
@NotNull
@Column(name = "username")
String username;
@ElementCollection
@CollectionTable(name = "users_roles_mapping", joinColumns = @JoinColumn(name = "user_id"))
@Column(name = "role_name")
Set<String> roles;
// ...
}{code}
{code:sql} -- MSSQL 2022
CREATE TABLE users (
id INT NOT NULL IDENTITY,
username VARCHAR(50) NOT NULL,
CONSTRAINT pk_users PRIMARY KEY (id)
);
CREATE TABLE roles (
name VARCHAR(50) NOT NULL,
CONSTRAINT pk_roles PRIMARY KEY (name)
);
CREATE TABLE users_roles_mapping (
user_id INT NOT NULL,
role_name VARCHAR(50) NOT NULL,
CONSTRAINT pk_users_roles_mapping PRIMARY KEY (user_id, role_name),
CONSTRAINT fk_users_roles_mapping_user FOREIGN KEY (user_id) REFERENCES users (id),
CONSTRAINT fk_users_roles_mapping_role FOREIGN KEY (role_name) REFERENCES roles (name)
);
INSERT INTO users (username) VALUES ('user1');
INSERT INTO roles (name) VALUES ('role1'), ('role2');
INSERT INTO users_roles_mapping (user_id, role_name) VALUES (1, 'role1'), (1, 'role2');{code}
{code:java}public Set<String> getUserRoles() {
EntityGraph<UserEntity> entityGraph = entityManager.createEntityGraph(UserEntity.class);
entityGraph.addAttributeNodes("roles");
Query query = entityManager.createQuery("SELECT u FROM UserEntity u WHERE u.id = 1");
query.setMaxResults(1);
query.setHint(EntityGraphType.FETCH.getKey(), entityGraph);
UserEntity userEntity = (UserEntity) query.getSingleResult();
return userEntity.getRoles();
}{code}
{{getUserRoles}} returns 2 roles in Hibernate {{5.6.15.Final}} and returns 1 role (which is wrong) in Hibernate {{6.1.7}}. |
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