Hibernate@EmbeddeId包含具有继承的实体的外键

Question

以此作为我的基点：https://vladmihalcea.com/the-best-way-to-map-a-many-to-many-association-with-extra-columns-when-using-jpa-and-hibernate/

我有一个名为 Attendance 的实体，它有一个 emebedid AttendacneId，它有两列 lectureId （string） 和 studenId（UUID）。出勤实体还具有其他属性，其中包含与学生和讲座的多对一关系，并使用@MapsId。学生将 id 所在的用户实体扩展。现在，当我尝试保存任何内容时，我得到这个错误。

java.util.NoSuchElementException
at java.util.ArrayList$Itr.next(ArrayList.java:860)
at org.hibernate.cfg.annotations.TableBinder.linkJoinColumnWithValueOverridingNameIfImplicit(TableBinder.java:724)
at org.hibernate.cfg.PkDrivenByDefaultMapsIdSecondPass.doSecondPass(PkDrivenByDefaultMapsIdSecondPass.java:37)
at org.hibernate.boot.internal.InFlightMetadataCollectorImpl.processSecondPasses(InFlightMetadataCollectorImpl.java:1684)
at org.hibernate.boot.internal.InFlightMetadataCollectorImpl.processSecondPasses(InFlightMetadataCollectorImpl.java:1641)
at org.hibernate.boot.model.process.spi.MetadataBuildingProcess.complete(MetadataBuildingProcess.java:286)
at org.hibernate.boot.model.process.spi.MetadataBuildingProcess.build(MetadataBuildingProcess.java:83)
at org.hibernate.boot.internal.MetadataBuilderImpl.build(MetadataBuilderImpl.java:473)
at org.hibernate.boot.internal.MetadataBuilderImpl.build(MetadataBuilderImpl.html" target="_blank">java:84)
at utility.Utils.<clinit>(Utils.java:60)
at utility.Testing.main(Testing.java:21)

我的出勤班

@Embeddable
public class AttendanceId implements Serializable {

@Column(name = "lecture_fid")
@Getter
@Setter
private String lectureId;

@Column(name = "student_fid", columnDefinition = "uuid")
@Getter
@Setter
private UUID studentId;

public AttendanceId() {} 
}

我的出勤班

@Entity
@Table(name = "attendance")
public class Attendance implements Serializable {

@EmbeddedId
@Getter
@Setter(AccessLevel.PRIVATE)
private AttendanceId id;
// other fields


@ManyToOne(fetch = FetchType.LAZY)
@MapsId("lectureId")
private Lecture lecture;

@ManyToOne(fetch = FetchType.LAZY)
@MapsId("studentId")
private Student student;
}

我的学生班级

@Entity
@PrimaryKeyJoinColumn(name = "id")
public class Student extends User implements Serializable, 
Comparable<Student> {
// other fields

@OneToMany(mappedBy = "student", fetch = FetchType.LAZY)
@Getter
private List<Attendance> attendances = new ArrayList<>();
}

我的用户类

@Entity
@Table(name = "users", uniqueConstraints = {
    @UniqueConstraint(columnNames = {"email", "username"})})
@Inheritance(strategy = InheritanceType.JOINED)
public abstract class User implements Serializable {


@Id
@GeneratedValue(generator = "uuid")
@GenericGenerator(name = "uuid", strategy = "uuid")
@Column(columnDefinition = "UUID")
@Getter(AccessLevel.PUBLIC)
@Setter(AccessLevel.PUBLIC)
private UUID id;
// other fields.
}

我的讲座课

@NamedNativeQueries(
    @NamedNativeQuery(name = "getLectureId", query = "select 
       get_lecture_id()")
    )
@Entity
@Table(name = "lecture")
public class Lecture implements Serializable {

@Id
@Column(name = "id")
@GenericGenerator(name = "lectureIdGenerator",
        strategy = "entities.LectureIdGenerator")
@GeneratedValue(generator = "lectureIdGenerator")
@Getter
@Setter
private String id;

@OneToMany(mappedBy = "lecture", fetch = FetchType.LAZY)
@Getter
private List<Attendance> attendances = new ArrayList<>();
// other fields
}

我认为遗产正在引起一个问题。还有其他扩展用户实体的类/实体。如果有人能帮我找到问题，那就太好了。谢谢你。

Answer 1

此问题是由HHH-7135Hibernate问题引起的。