父表中的重复记录@ManyToOne 双向关联

问题描述

我在持久化父类 ProxyEntity 时遇到问题，我看到在代理表中添加了重复的行。知道在保存父类时，它也会保存子类（codeEntity，这是一个集合） 查看日志后，先保存父类，然后在保存子类时，它会再次保存proxyEntity的另一条记录。 （我使用的是双向关联）

ProxyEntity 类：

@Entity
@Getter
@Setter
@ToString
@Table(name = "PROXY")
public class ProxyEntity implements Persistable {

protected static final Logger logger = LoggerFactory.getLogger(ProxyEntity.class);

@Id
@GeneratedValue(strategy = GenerationType.SEQUENCE,generator = "SEQ_PROXY_ID")
@SequenceGenerator(name = "SEQ_PROXY_ID",sequenceName = "SEQ_PROXY_ID",allocationSize = 1)
@Column(name = "PROXY_ID")
private Long proxyId;


@OnetoOne(cascade = CascadeType.MERGE)
@JoinColumn(name = "BRAND_STATUS_ID",referencedColumnName = "BRAND_STATUS_ID")
private BrandStatus brandStatus;


@Column(name = "DATE_CREATION")
private Date dateCreation;

@Column(name = "CREATED_BY")
private String createdBy;


@OnetoMany( mappedBy = "proxyEntity",cascade = CascadeType.ALL,fetch = FetchType.LAZY,orphanRemoval = true)
private Set<CodeEntity> codes = new HashSet<>();

@Override
public Long getId() {
    return proxyId;
}

@Override
public boolean isNew() {
    return proxyId== null;
}
}

代码实体.java

@Entity
@Getter
@Setter
@ToString
@Table(name = "CODES")
public class CodeEntity implements Persistable {

protected static final Logger logger = LoggerFactory.getLogger(CodeEntity.class);

@Id
@GeneratedValue(strategy = GenerationType.SEQUENCE,generator = "SEQ_CODE_ID")
@SequenceGenerator(name = "SEQ_CODE_ID",sequenceName = "SEQ_CODE_ID",allocationSize = 1)
@Column(name = "CODE_ID")
private Long codeId;

@Column(name = "CODE")
private String code;

@Column(name = "CODE_DESC")
private String codeDesc;

@Column(name = "DATE_CREATION")
private Date dateCreation;

@Column(name = "CREATED_BY")
private String createdBy;


@ManyToOne(fetch = FetchType.LAZY)
@JoinColumn(name = "PROXY_ID")
private proxyEntity proxyEntity;

@Override
public Long getId() {
    return codeId;
}

@Override
public boolean isNew() {
    return codeId == null;
}
}

我保存每个实体的部分：

 codesLst.stream().forEach(code -> {
        CodeEntity codeEntity = new CodeEntity();
        codeEntity.setDateCreated(new Date());
        codeEntity.setCreatedBy(reatedBy);
        codeEntity.setCode(code);
        codeEntity.setProxyEntity(proxy);
        codeSet.add(codeEntity);
    });
 proxy.setCodes(codesLst);

我正在使用 Spring Data Jpa 持久化数据：

List<ProxyEntity> persistedProxies = proxyRepository.saveAll(proxyEntityList);

在代理表中，它们是重复记录：

非常感谢您对这个问题的帮助。

谢谢

解决方法

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