相关疑难解决方法(0)

我有一个USER表和一个COURSE表.用户可以拥有许多课程,而且很多用户都可以参加课程.联结表包含一个ROLE值,用于确定用户在COURSE(即讲师,学生等)中的角色.我需要知道如何将此角色与每个USER的COURSE相关联.

如果我将该角色放在Course类中,它就无法工作,因为一个Course有很多用户,反之亦然.

这是我到目前为止所拥有的:

@Entity
@Table(name = "USERS")
public class User {

@Id
@Column(name = "PK1")
private Long id;

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

@ManyToMany
@JoinTable(name = "COURSE_USERS", 
    joinColumns = @JoinColumn(name = "USERS_PK1", referencedColumnName = "PK1"), 
    inverseJoinColumns = @JoinColumn(name = "CRSMAIN_PK1", referencedColumnName = "PK1"))
private Collection<Course> courses;

...

@Entity
@Table(name = "COURSE")
@SecondaryTable(name = "COURSE_USERS", 
pkJoinColumns = @PrimaryKeyJoinColumn(name = "CRSMAIN_PK1"))
public class Course {

@Id
@Column(name = "PK1")
private Long id;

    // THIS PROBABLY WON'T WORK //
@Column(name = "ROLE", …