Question

我有三个要链接的表
学生（id，名字，姓氏）->存储学生详细信息
问题（id，问题，答案）->使用正确的答案存储问题
答案（id，qid，answer）->存储问题ID和学生给出的答案
将使用@OneToMany将学生和答案链接起来
除了FK之外，我们还可以具有@OneToMany的属性吗，以便我可以在其中包含问题ID和给定的答案

@Entity
@Table(name = "answer")
@SecondaryTable(name = "question",pkJoinColumns = {
        @PrimaryKeyJoinColumn(name="qid",referencedColumnName = "qid")})
public class AnswerEntity {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private long id;

    @Column(name = "qid")
    private long qid;

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


@Entity
@Table(name = "question")
@Inheritance(strategy = InheritanceType.JOINED)
@Component
public class QuestionEntity implements Serializable {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "qid", updatable = false, nullable = false, unique = true)
    private long qid;
...
}
@Entity
@Table(name="student")
public class Student{
 ...
@OneToMany(fetch = FetchType.EAGER)
    @Cascade({org.hibernate.annotations.CascadeType.DELETE, org.hibernate.annotations.CascadeType.SAVE_UPDATE})
    @JoinTable(name = "has_answered", joinColumns = {@JoinColumn(name = "student_id", referencedColumnName = "uid")}, inverseJoinColumns = {@JoinColumn(name = "answer_id", referencedColumnName = "id")})
    private List<AnswerEntity> answerEntityList;
...
}

我收到此错误消息-
org.hibernate.AnnotationException：SecondaryTable JoinColumn无法引用非主键

具有SecondaryTable注释的休眠异常

0 个答案: