JPA Hibernate 带@EmbeddedId 的 Clildren 未加载到 Weblogic 服务器上，但已加载到集成测试中

Question

I have a problem with JPA and Hibernate where I have 2 entities that are in relation of 1 to many. On local host on the integraiton test using H2 the things are as they should (children are loaded), when deployed into the weblogic server that is using Oracle as DB, the children are not loaded. Any idea on this? The entities definitions are:

@Entity
@Table(name = "TB_MASTER")
@Data
@ToString
@NoArgsConstructor
public class Case implements Serializable {
 private static final long serialVersionUID = 1919288768119684307463L;

 @Id
 @Column(name = "ID", nullable = false, length = 55)
 private String id;
 @Column(name = "CODE_ADR", nullable = false, length = 100)

 @OneToMany(cascade = CascadeType.ALL, fetch = FetchType.EAGER, orphanRemoval = true, mappedBy = "id.masterId")
 @EqualsAndHashCode.Exclude
 private Set<MasterReference> references = new TreeSet<>();

}

The EmbeddedId class:

@Data
@AllArgsConstructor
@EqualsAndHashCode
@NoArgsConstructor
@Embeddable
public class MasterReferenceId implements Serializable, Comparable {
 @ManyToOne(optional = false)
 @JoinColumn(name = "MASTER_ID", nullable = false)
 @ToString.Exclude
 @EqualsAndHashCode.Exclude
 private Master masterId;

 @Column(name = "REF", nullable = false, length = 42)
 private String reference;

 @Column(name = "SHORCUT", nullable = false, length = 100)
 private String shortcut;

 @Column(name = "REF_DATE")
 private Date refDate;

 @Column(name = "REF_BACK", length = 1)
 @Convert(converter = BooleanToNumberConverter.class)
 private Boolean refBack;

 @Column(name = "REF_DATA_ROW", length = 2000)
 private String refDataRow;

 @Override
 public int compareTo(Object o) {
     if (o instanceof MasterReferenceId && ((MasterReferenceId) o).getReference() != null && ((MasterReferenceId) o).getReference() != null) {
        return ((MasterReferenceId) o).getReference().compareTo(this.getReference());
    }
     return 0;
 }
}

The cild entity:

 @Entity
 @Table(name = "TB_MASTER_REFERENCE")
 @Data
 @ToString
 @NoArgsConstructor
 public class MasterReference implements Serializable, Comparable {

  private static final long serialVersionUID = -517596820344348395356L;

  @EmbeddedId
  private MasterReferenceId id;

  @Column(name = "UPDATE_DATE", nullable = false)
  private Date updateDate;


  @Column(name = "COMMENTS", length = 4000)
  private String comments;

  @Override
  public int compareTo(Object o) {
    if (o instanceof MasterReference && ((MasterReference) o).getId() != null) {
        return ((MasterReference) o).getId().compareTo(this.getId());
    }
    return 0;
  }
 }

Answer 1

Try this instead:

public class MasterReference implements Serializable, Comparable {

  @EmbeddedId
  private MasterReferenceId id;

  @ManyToOne(optional = false)
  @JoinColumn(name = "MASTER_ID", nullable = false)
  @MapsId("masterId")
  private Master masterId;

  ..
}

public class MasterReferenceId implements Serializable, Comparable {

  private String masterId;
  ..
}

Change the mappedBy in the OneToMany on references to just "masterId" so that it uses the reference mapping instead of trying to use the embeddedId.