[SOLVED] Hibernate doesn't allow not unique records even when unique is false

Hibernate doesn't allow not unique records even when unique is false

I have a databse with users and their passwords. when i launch my app i create some users with roles and store them into database. My user entity:

@Entity
@Table(name = "USERS")
public class User {
    @Id
    @Column(name = "USERNAME",  nullable = false,  unique = true)
    private String username;

    @Column(name = "PASSWORD", nullable = false)
    private String password;

    @Column(name = "ENABLED", nullable = false)
    private boolean enabled = true;

    @OneToMany(cascade = CascadeType.ALL, mappedBy = "user", fetch = FetchType.EAGER)
    private Set<UserRole> userRole = new HashSet<>();
...getters and setters

and userRole entity

@Entity
@Table(name = "user_roles")
public class UserRole {


    @Id
    @Column(name = "ROLE")
    private String role;

    @ManyToOne(fetch = FetchType.EAGER)
    @JoinColumn(name = "USERNAME")
    private User user;

column role is unique=false by default, but when i add userA with roles: admin,user and then userB with roles: user, record userB - user overwrites record userA - user. Can someone point what is my mistake?

i'm using hibernate 5 + spring 5

Solution

An ID is, by definition, unique. That's what uniquely identifies an entity.