Hibernate @OneToMany由2个不同的列映射

Question

I have an object called Lecture and it has 2 fields which are both of type Teacher

class Lecture{

    private Teacher teacher;
    private Teacher subsTeacher;

}

Lets assume a Teacher may teach many lectures. So there is a one to many relation between Teacher -> Lecture

Now in Teacher class I have:

@OneToMany(mappedBy = "teacher")
@Cascade(value = {org.hibernate.annotations.CascadeType.DETACH, 
                            org.hibernate.annotations.CascadeType.LOCK})
public Set<Lecture> getLectures() {
    return lectures;
}

However, this will not return me the Lectures the teacher is subsTeacher to. But I need them as well.

How can I achieve this?

Table structure:

Table: Lecture

Columns: id, teacher_id, substeacher_id

Table Teacher:

Columns: id, name

Answer 1

For this you need to filter lectures according to teacher/subteacher and manually set to the lectures list. Otherwise you need to do separate mapping. if you need to save the lectures with the teacher you should add separate mapping and use accordingly.

@OneToMany(mappedBy = "subsTeacher", cascade = {CascadeType.ALL}) 
private Set<Lecture> subLectures;