为什么在休眠状态下我的EmbeddedId无法正常工作？

Question

我有一个复合主键(IDHOLIDAYPACKAGE, IDHOLIDAYPACKAGEVARIANT)的表HolidayPackageVariant，其中IDHOLIDAYPACKAGE指的是实体
HolidayPackage 有 许多 到 一个 关系 HolidayPackageVariant 和
HolidayPackage 。

当我尝试在HolidayPackageVariant中进行复杂的PK映射时，出现以下错误：

最初的SessionFactory创建失败。

有人可以告诉我我在做什么错吗？

我的POJO如下所示：

HolidayPackageVariant：

@Entity
@Table(name="HOLIDAYPACKAGEVARIANT")
public final class HolidayPackageVariant {

    private HolidayPackageVariantPrimaryKey idCompound;

    @EmbeddedId
    public HolidayPackageVariantPrimaryKey getIdCompound() {
        return idCompound;
    }

    // other code
}

HolidayPackageVariantPrimaryKey

@Embeddable
public final class HolidayPackageVariantPrimaryKey implements Serializable {

    private Integer idHolidayPackageVariant;
    private HolidayPackage holidayPackage;

    public HolidayPackageVariantPrimaryKey(){}

    public HolidayPackageVariantPrimaryKey(int id, HolidayPackage pkg){
        setIdHolidayPackageVariant(id);
        setHolidayPackage(pkg);
    }

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "IDHOLIDAYPACKAGEVARIANT", nullable = false)
    public Integer getIdHolidayPackageVariant() {
        return idHolidayPackageVariant;
    }

    @Id
    @ManyToOne(fetch=FetchType.LAZY, cascade={CascadeType.ALL})
    @JoinColumn(name="IDHOLIDAYPACKAGE", nullable=false)
    public HolidayPackage getHolidayPackage() {
        return holidayPackage;
    }

    // equals and hashCode
}

假日套餐

public final class HolidayPackage {
    private Set<HolidayPackageVariant> holidayPackageVariants = new HashSet<HolidayPackageVariant>(0);

    @OneToMany(fetch=FetchType.LAZY, cascade={CascadeType.ALL}, mappedBy = "idCompound.holidayPackage")
    public Set<HolidayPackageVariant> getHolidayPackageVariants() {
        return holidayPackageVariants;
    }

    // other code
}

Answer 1

您不应该@Id在EmbeddedId课程中使用。删除Id您的注释，HolidayPackageVariantPrimaryKey它应该可以正常工作。