Question

In My Hibernate Annotation based Application… i’m creating the table like this..

    CREATE  TABLE IF NOT EXISTS `EC_USER` (
  `S_ID` VARCHAR(30) NOT NULL PRIMARY KEY,
`CREATED_DATE` DATETIME NULL ,
`MODIFIED_BY` VARCHAR(30) NULL ,
 CONSTRAINT `CREATED_BY`
    FOREIGN KEY (`CREATED_BY` )
    REFERENCES `EC_USER` (`S_ID` )
    ON DELETE NO ACTION
    ON UPDATE NO ACTION,
  CONSTRAINT `MODIFIED_BY`
    FOREIGN KEY (`MODIFIED_BY` )
    REFERENCES `EC_USER` (`S_ID` )
    ON DELETE NO ACTION
    ON UPDATE NO ACTION)

So HOw to write my Hibernate Bean…

@Entity
@Table(name = "EC_USER")
public class UserVO{
@Id
@Column(name="S_ID")
private String id;
@Column(name = "CREATED_DATE")
private Date createdDate;
@Column(name = "LAST_MODIFIED_DATE")
private Date modifiedDate;
}

So this is Correct one or any relation mapping Required…

Answer 1

Assuming there is a CREATED_BY AND MODIFIED_BY columns you could write

@Entity
@Table(name = "EC_USER")
public class UserVO{
@Id
@Column(name="S_ID")
private String id;
@Column(name = "CREATED_DATE")
private Date createdDate;
@Column(name = "LAST_MODIFIED_DATE")
private Date modifiedDate;

@ManyToOne
@JoinColumn(name="created_by")
private UserVO createdBy; 


@ManyToOne
@JoinColumn(name="modified_by")
private UserVO modifiedBy; 

}