Call relation getter before insert got error

[Syafiqq]

When I call getUser() on an entity that not inserted yet, it will throw DaoException: Entity is detached from DAO context instead of null. Is that normal?.

User Class:

public class User {
    @Id
    private Long id;
	// rest code
}

Note Class:

// Annotation
public class Note {
    @Id
    private Long id;
    private Long userId;
    @ToOne(joinProperty = "userId")
    private User user;
	// rest code
}

Reproduce step:

val note = Note()
assertThat(entity?.user, IsNull()) // This throws error instead of null
// Insert code