spring boot中同一实体的多表示

Question

我得同时更新三张表。当我从邮递员点击时，所有表都成功保存了，但当我尝试更新时，它抛出了catch异常，就像同一个实体的多个表示一样。

EmployeeDetails

public class EmployeeDetails implements Serializable{   
@Id 
@GeneratedValue(strategy = GenerationType.IDENTITY) 
@Column(name = "user_id", unique = true, length = 11, nullable = false) 
private Integer userId;         
    //other variable

@OneToOne(mappedBy="user",cascade =  CascadeType.ALL)   
private EmployeeAdditionalinfo userAdditionalInfo;
@OneToMany(mappedBy="user",cascade = CascadeType.ALL)
private Set<EducationDetails> educationDetail;
 //getter and setter
}

public class EmployeeAdditionalinfo {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Column(name = "user_additional_info_id", unique = true, length = 11, nullable = false)
private Integer userAdditionalInfoId;

//other variable
@ManyToOne(cascade=CascadeType.ALL)
@JoinColumn(name = "user_id")
private EmployeeDetails user;

@OneToOne(cascade=CascadeType.ALL)
@JoinColumn(name = "address_id")
private EmployeeAddress address;
//getter or setter }

public class EducationDetails {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Column(name = "s_no", unique = true, length = 10, nullable = true)
private Integer sno;

//variable
@ManyToOne(cascade=CascadeType.ALL)
@JoinColumn(name = "user_id")
private EmployeeDetails user;

//getter and setter }

InvalidDataAccessapiUsageException：正在合并同一实体[com.icore.payroll.attendance.entity.EmployeeDetails#379]的多个表示形式。已分离：[EmployeeDetails[userid=379,username=用户名,firstname=ganesh1,lastname=babu,middleinitial=middle,email=email,password=passwo,......]]

Answer 1

我认为您必须只在关系的一侧配置级联。

由于EducationDetails实体内的级联配置，当前您正在触发所有类型的级联，从EmployeeDetails到一组EducationDetails，然后再返回到EmployeeDetails。

这是有意义的，因为错误表示我们有相同实体的两个不同表示（实例），一个在您试图刷新的持久性上下文中，另一个在上次级联期间检索到。

您可以尝试删除最后一个配置并最终手动管理它。