Persistente Hibernate-Entität sollte einen Primärschlüssel haben

Question

Ich habe die folgende Entität. Ich versuche das Nachfolgende zu ersetzen. (Siehe Bild), aber ich bekomme den folgenden Fehler: Persistente Entität sollte einen Primärschlüssel haben.

(Ich bin neu in dem Ruhezustand) (Bitte kommentieren, wenn Sie auch die UserEntity Klasse benötigen) (Vielen Dank im Voraus!)

@Entity 
@Table(name = "Student", schema = "pad_ijburg", catalog = "") 
public class StudentEntity extends UserEntity { 
    private Integer idGroup; 
    private int idUser; 

    @Basic 
    @Column(name = "idGroup") 
    public Integer getIdGroup() { 
     return idGroup; 
    } 

    public void setIdGroup(Integer idGroup) { 
     this.idGroup = idGroup; 
    } 

    @Basic 
    @Column 
    public int getIdUser() { 
     return idUser; 
    } 

    public void setIdUser(int idUser) { 
     this.idUser = idUser; 
    } 

    @Override 
    public boolean equals(Object o) { 
     if (this == o) return true; 
     if (o == null || getClass() != o.getClass()) return false; 

     StudentEntity that = (StudentEntity) o; 

     if (idUser != that.idUser) return false; 
     if (idGroup != null ? !idGroup.equals(that.idGroup) : that.idGroup != null) return false; 

     return true; 
    } 

    @Override 
    public int hashCode() { 
     int result = idGroup != null ? idGroup.hashCode() : 0; 
     result = 31 * result + idUser; 
     return result; 
    } 
} 

package org.hva.folivora.model.user; 

import javax.persistence.*; 

/** 
* 
*/ 
@Entity 
@Table(name = "User", schema = "pad_ijburg") 
@Inheritance(strategy = InheritanceType.JOINED) 
public class UserEntity { 
    private int idUser; 
    private String email; 
    private String firstName; 
    private String lastName; 
    private String password; 
    private Boolean admin; 

    @Id @GeneratedValue(strategy = GenerationType.AUTO) 
    @Column(name = "idUser", nullable = false) 
    public int getIdUser() { 
     return idUser; 
    } 

    public void setIdUser(int idUser) { 
     this.idUser = idUser; 
    } 

    @Basic 
    @Column(name = "email") 
    public String getEmail() { 
     return email; 
    } 

    public void setEmail(String email) { 
     this.email = email; 
    } 

    @Basic 
    @Column(name = "firstName") 
    public String getFirstName() { 
     return firstName; 
    } 

    public void setFirstName(String firstName) { 
     this.firstName = firstName; 
    } 

    @Basic 
    @Column(name = "lastName") 
    public String getLastName() { 
     return lastName; 
    } 

    public void setLastName(String lastName) { 
     this.lastName = lastName; 
    } 

    @Basic 
    @Column(name = "password") 
    public String getPassword() { 
     return password; 
    } 

    public void setPassword(String password) { 
     this.password = password; 
    } 

    @Basic 
    @Column(name = "admin") 
    public Boolean getAdmin() { 
     return admin; 
    } 

    public void setAdmin(Boolean admin) { 
     this.admin = admin; 
    } 

    @Override 
    public boolean equals(Object o) { 
     if (this == o) return true; 
     if (o == null || getClass() != o.getClass()) return false; 

     UserEntity that = (UserEntity) o; 

     if (idUser != that.idUser) return false; 
     if (email != null ? !email.equals(that.email) : that.email != null) return false; 
     if (firstName != null ? !firstName.equals(that.firstName) : that.firstName != null) return false; 
     if (lastName != null ? !lastName.equals(that.lastName) : that.lastName != null) return false; 
     if (password != null ? !password.equals(that.password) : that.password != null) return false; 
     if (admin != null ? !admin.equals(that.admin) : that.admin != null) return false; 

     return true; 
    } 

    @Override 
    public int hashCode() { 
     int result = idUser; 
     result = 31 * result + (email != null ? email.hashCode() : 0); 
     result = 31 * result + (firstName != null ? firstName.hashCode() : 0); 
     result = 31 * result + (lastName != null ? lastName.hashCode() : 0); 
     result = 31 * result + (password != null ? password.hashCode() : 0); 
     result = 31 * result + (admin != null ? admin.hashCode() : 0); 
     return result; 
    } 
} 

Edit: Auch die folgende Fehlermeldung erhalten, wenn mit generierten Wert Identiti

.StudentEntity column: idUser (should be mapped with insert="false" update="false") 

Answer 1

können Sie bitte versuchen, Ihren Code zu ersetzen

@GeneratedValue(strategy=GenerationType.AUTO) 

mit

@GeneratedValue(strategy=GenerationType.IDENTITY)