Why JpaRepository<User, Long> returns null value-CodePudding

I have a Spring Boot project, in which I have problem with JpaRepository<User,Long>.

I defined following interface

public interface UserDAO extends JpaRepository<User, Long> {
    User findByEmail(String email);
}

which was implemented in UserServiceImpl

@Override
public User findByEmail(String email) {
    return userDAO.findByEmail(email);
}

and I need it in UserDetailsServiceImpl but next line

User user = userDAO.findByEmail(email);

returns null.

My model classes:

User

@Entity
@Table(name = "users")
public class User {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "id")
    private long id;

    @Column(name = "email")
    private String email;

    @Column(name = "login")
    private String login;

    @Column(name = "password")
    private String password;

    @ManyToMany
    @JoinTable(name = "user_roles",
            joinColumns = @JoinColumn(name = "user_id"),
            inverseJoinColumns = @JoinColumn(name = "role_id"))
    private Set<Role> roles;

    @Transient
    private String confirmPassword;
    //getters-setters

}

Role

@Entity
@Table(name = "roles")
public class Role implements GrantedAuthority {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private long id;

    @Column(name = "name")
    private String name;

    @ManyToMany(mappedBy = "roles")
    private Set<User> users;

What can I do?

CodePudding user response：

Try to use the annotations on the getter, not the fields.

CodePudding user response：

You need to follow JavaBean specification for entity(you need to have default contrucor and getters and setters in User and Role)