Spring Boot中同一實體的多種表示

Question

我必須同時更新三個表。 當我從郵遞員那里命中時，所有表都被成功保存，但是當我嘗試更新時，它會引發catch異常，例如同一實體的多個表示形式。

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
}

EmployeeAdditionalinfo

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 }

教育細節

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 }

錯誤

org.springframework.dao.InvalidDataAccessApiUsageException：同一實體的多個表示形式[com.icore.Payroll.Attendance.Entity.EmployeeDetails＃379]正在合並。 分離：[EmployeeDetails [userId = 379，userName =用戶名，firstName = Ganesh1，lastName = Babu，middleInitial = Middle，email = Email，password = passwo，......]]

Answer 1

我認為您必須僅在關系的一側配置級聯。

當前，由於EducationDetails實體內部的級聯配置，您正在觸發從EmployeeDetails到EducationDetails集的所有類型的層疊，然后又返回到EmployeeDetails 。

這是有道理的，因為該錯誤表明我們對同一實體有兩種不同的表示（實例），一種在您要刷新的持久性上下文內，另一種在上一次級聯期間檢索。

您可以嘗試刪除最后一個配置，並最終手動對其進行管理。