Question

我已经阅读了许多关于类似错误的帖子，并尝试了所有建议，但我遇到的错误仍未解决。

在spring mvc应用中使用hibernate和jpa且InheritanceType.JOINED高于MySQL数据库时，我在尝试持久化子类时不断收到以下错误：

com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Duplicate entry '4' for key 'PRIMARY'

错误始于1，然后是2，然后是3，然后是4，尽管父表的值已经达到{{} {1}}。这让我怀疑对子类的11调用在某种程度上看不到父表的主键值。 但是如何解决此问题并解决错误？以下是抛出错误时正在运行的存储库代码：

EntityManager.persist()

接下来是类的注释。请注意，我还尝试过@Override public void saveRIMOrganization(Organization myorg) throws DataAccessException{ if (myorg.getHppid() == null) {this.em.persist(myorg);}//ERROR THROWN HERE else {this.em.merge(myorg);} }，strategy = "native"和strategy = "identity"，但我仍然遇到同样的错误。

strategy = "sequence"

数据库表是由hbm2ddl创建的，所以我需要在java / hibernate级别进行任何必要的更改，但我做了与上述实体对应的三个表的MySQL转储，并且ddl代码是：< / p>

@Entity(name = "rimInfrastructureRoot")
@Table(name = "rim_infrastructure_root")
@Inheritance(strategy = InheritanceType.JOINED)
public class InfrastructureRoot {
    @Id
    @Column(name="hppid")
    @GenericGenerator(name = "generator", strategy = "native")
    @GeneratedValue(generator = "generator")
    private Long hppid;

    public Long getHppid(){return hppid;}//non-compliant, added by jim
    public void setHppid(Long i){hppid=i;}//non-compliant, added by jim
    //other stuff
}

@Entity(name = "rimEntity")
@Table(name = "rim_entity")
public class rimEntity extends InfrastructureRoot{
//other stuff
}

@Entity(name = "rimOrganization")
@Table(name = "rim_organization")
public class Organization extends rimEntity {
}

hibernate / jpa使用InheritanceType.JOINED复制主键

0 个答案: