EntityNotFoundException-Hibernate和Springboot

Question

@Entity
@Table(name = "PS")
@Data
@IdClass(PlanSponsorId.class)
public class PS implements Serializable {

    private static final long serialVersionUID = -1685251075449473233L;

    @Id
    @Column(name = "PS_ID", columnDefinition = "INTEGER")
    private Integer ps_id;

    @Id
    @Column(name = "LAST_UPDATE_DTS", columnDefinition = "DATETIME")
    private Date lastUpateTimestamp;

    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumns({ @JoinColumn(name = "CFO_ID",referencedColumnName="CFO_ID"),
            @JoinColumn(name = "CFO_LAST_UPDATE_DTS",referencedColumnName="LAST_UPDATE_DTS") })
    private CFO cfo;

//other fields
}

@Data
@NoArgsConstructor
public class PlanSponsorId implements Serializable {

    private static final long serialVersionUID = 2224235254147911360L;
    private Date lastUpateTimestamp;
    private Integer ps_id;

}

@Entity
@Table(name = "CFO")
@Data
@IdClass(value = CFOModelId.class)
public class CFO implements Serializable {
    private static final long serialVersionUID = -1082267441376710907L;

    @Id
    @Column(name = "CFO_ID", columnDefinition = "CHAR(3)")
    private String cfoIdentifier;
    @Id
    @Column(name = "LAST_UPDATE_DTS", columnDefinition = "DATETIME")
    private Date lastUpateTimestamp;
    @OneToMany(mappedBy="cfo")
    private List<PS> ps;

//other fields
}

@Data
@NoArgsConstructor
public class CFOModelId implements Serializable {
    private static final long serialVersionUID = -325079478600059751L;
    private String cfoIdentifier;
    private Date lastUpateTimestamp;
}

javax.persistence.EntityNotFoundException: Unable to find com.abc.CFO with id CFOModelId(cfoIdentifier=1  , lastUpateTimestamp=2019-12-30 01:36:08.773)
    at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$JpaEntityNotFoundDelegate.handleEntityNotFound(EntityManagerFactoryBuilderImpl.java:162)
    at org.hibernate.proxy.AbstractLazyInitializer.checkTargetState(AbstractLazyInitializer.java:285)
    at org.hibernate.proxy.AbstractLazyInitializer.initialize(AbstractLazyInitializer.java:180)
    at org.hibernate.proxy.AbstractLazyInitializer.getImplementation(AbstractLazyInitializer.java:309)
    at org.hibernate.proxy.pojo.bytebuddy.ByteBuddyInterceptor.intercept(ByteBuddyInterceptor.java:45)

当我只保留一个主键--无论是CFO_ID还是LAST_UPDATE_DTS，并完全删除Idclass时，它工作得非常好。这让我认为idclass有问题，但我找不到任何问题。有人能帮忙吗？

Answer 1

根据Hibernate文档，Hibernate似乎允许这样做，但它不符合JPA。

5.1.2.1.2. Multiple id properties without identifier type

Another, arguably more natural, approach is to place @Id on multiple properties of your entity. This approach is only supported by Hibernate (not JPA compliant) but does not require an extra embeddable component.

对于符合JPA的解决方案，您必须为此设置指定一个额外的@IDClass（或使用EmbeddedId）：

引用：对同一个类中的多个字段使用@id

@Entity 
@IdClass(ProjectId.class)
public class Project {
@Id int departmentId;
@Id long projectId;
}