JPA Fetch Types - spring-boot

Question

I have two model classed called users and authorities. I used fetch type EAGER so that all the data even the ones from the authorities tables would be fetched as they are mapped to each other, But for some reason it is not fetching the details from the authorities table.
#Getter
#Setter
#Entity
#Table
public class Users {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private int id;
#Column(unique = true)
private String email;
private String firstname;
private String lastname;
private String password;
#OneToMany(mappedBy = "users",
cascade = CascadeType.PERSIST,
fetch = FetchType.EAGER,
targetEntity = Authorities.class)
private Set<Authorities> authorities;
}
#Getter
#Setter
#Entity
#Table
public class Authorities {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private int id;
private String role;
#ManyToOne(targetEntity = Users.class,
cascade = CascadeType.PERSIST,
fetch = FetchType.EAGER)
#JoinColumn(name = "authorities")
private Users users;
}
#Repository
public interface UserRepository extends JpaRepository<Users, Integer> {
Optional<Users> findByEmail(String email);
}
This method findByEmail is not fetching all the details from the database. It is only fetching the data from the users table but not from the authorities table even though i am using fetch type EAGER.

Answer 1

I think that Spring Data ignores fetch types and fetch mode. You can use Entity Graphs. See documentation
#Getter
#Setter
#Entity
#Table
#NamedEntityGraph(name = "authorities.detail", attributeNodes = NamedAttributeNode("authorities"))
public class Users {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private int id;
#Column(unique = true)
private String email;
private String firstname;
private String lastname;
private String password;
#OneToMany(mappedBy = "users",
cascade = CascadeType.PERSIST,
fetch = FetchType.EAGER,
targetEntity = Authorities.class)
private Set<Authorities> authorities;
}