'一对多'属性值类型不应该是'持久性实体' [英] 'one to many' attribute value type should not be 'persistence entity'

问题描述

User class

  import org.hibernate.annotations.Cascade; 
 import org.hibernate.annotations.CascadeType; 
 import org.hibernate.annotations.Fetch; 
 import org.hibernate.annotations.FetchMode; 
 import org.hibernate.validator.constraints.Email; 
 import org.hibernate.validator.constraints.NotBlank; 
 
 import javax.persistence.Column; 
 import javax.persistence.Entity; 
 import javax.persistence.FetchType; 
 import javax.persistence.GeneratedValue; 
 import javax.persistence.GenerationType; 
 import javax.persistence.Id; 
 import javax.persistence.OneToMany; 
 import javax.persistence.Table; 
 import java.util.LinkedHashSet; 
 import java.util.List; 
 import java.util.Set; 
 
 @Entity 
 @Table（name =USUARIO）
 public class Usuario {
 
 @Id 
 @GeneratedValue（strategy = 
 @Column（name =ID_USUARIO，unique = true，nullable = false）
私有长ID; 
 
 @NotBlank（message =usuario.cadastro.nome.obrigatorio）
 @Column（name =NOME，unique = true，nullable = false，length = 100）
 private String nome; 
 
 @Email（message =usuario.cadastro.email.invalido）
 @Column（name =E_MAIL，unique = true，nullable = false，length = 100）
私人字符串电子邮件; 
 
 @NotBlank（message =usuario.cadastro.senha.obrigatoria）
 @Column（name =SENHA，unique = true，nullable = false，length = 10）
 private String senha; 
 
 @OneToMany（mappedBy =usuario，fetch = FetchType.LAZY）
 @Cascade（{CascadeType.ALL}）
 @Fetch（value = FetchMode.SELECT）
私人套餐< DiasUsuarioTimeSheet> diasUsuarioTimeSheetList; 
 
 $ b $ public Usuario（）{
 diasUsuarioTimeSheetList = new LinkedHashSet< DiasUsuarioTimeSheet>（）; 
} 
  

另一个类：

  import org.hibernate.annotations.Cascade; 
 import org.hibernate.annotations.CascadeType; 
 
 import javax.persistence.Column; 
 import javax.persistence.Entity; 
 import javax.persistence.GeneratedValue; 
 import javax.persistence.GenerationType; 
 import javax.persistence.Id; 
 import javax.persistence.JoinColumn; 
 import javax.persistence.ManyToOne; 
 import javax.persistence.Table; 
 
 @Entity 
 @Table（name =DIAS_USUARIO_TIMESHEET）
 public class DiasUsuarioTimeSheet {
 
 @Id 
 @GeneratedValue（strategy = 
 @Column（name =ID_DIAS_USUARIO_TIMESHEET，unique = true，nullable = false）
 private长ID; 
 
 @Column（name =DIAS_ID_DIAS，unique = true，nullable = false）
 private Dias dia; 
 $ b @ManyToOne 
 @Cascade（{CascadeType.MERGE，CascadeType.SAVE_UPDATE}）
 @Column（name =USUARIO_ID_USUARIO，unique = true，nullable = false）
 private Usuario usuario; 
 
 @Column（name =TIME_SHEET_ID_TIME_SHEET，unique = true，nullable = false）
私人TimeSheet timeSheet; 
 
 public DiasUsuarioTimeSheet（）{
} 
  

我有错误在：

  @OneToMany（mappedBy =usuario，fetch = FetchType.LAZY）
 @Cascade（{CascadeType .ALL}）
 @Fetch（value = FetchMode.SELECT）
 private Set< DiasUsuarioTimeSheet> diasUsuarioTimeSheetList; 
  

'一对多'属性值类型不应该是'持久性实体'

解决方案

以下注释

  @Column =USUARIO_ID_USUARIO，unique = true，nullable = false）
  

应该是

  @JoinColumn（name =USUARIO_ID_USUARIO，nullable = false）
  

unique = true 属性没有意义，因为它是一个ManyToOne关联：显然，有几个DiasUsuarioTimeSheets引用相同用户。

同样，以下注释

  @Column（name =TIME_SHEET_ID_TIME_SHEET，unique = true，nullable = false）
  

必须替换为

$ $ $ $ $ $
@JoinColumn（name =

I have 1 user to many another domain and put this in my code:

User class

import org.hibernate.annotations.Cascade;
import org.hibernate.annotations.CascadeType;
import org.hibernate.annotations.Fetch;
import org.hibernate.annotations.FetchMode;
import org.hibernate.validator.constraints.Email;
import org.hibernate.validator.constraints.NotBlank;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.OneToMany;
import javax.persistence.Table;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Set;

@Entity
@Table(name = "USUARIO")
public class Usuario {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "ID_USUARIO",unique = true,nullable = false)
    private Long id;

    @NotBlank(message = "usuario.cadastro.nome.obrigatorio")
    @Column(name = "NOME", unique = true, nullable = false,length = 100)
    private String nome;

    @Email(message = "usuario.cadastro.email.invalido")
    @Column(name = "E_MAIL", unique = true, nullable = false,length = 100)
    private String email;

    @NotBlank(message = "usuario.cadastro.senha.obrigatoria")
    @Column(name = "SENHA", unique = true, nullable = false, length = 10)
    private String senha;

    @OneToMany(mappedBy = "usuario",fetch = FetchType.LAZY)
    @Cascade({CascadeType.ALL})
    @Fetch(value = FetchMode.SELECT)
    private Set<DiasUsuarioTimeSheet> diasUsuarioTimeSheetList;


    public Usuario() {
        diasUsuarioTimeSheetList = new LinkedHashSet<DiasUsuarioTimeSheet>();
    }

Another class:

import org.hibernate.annotations.Cascade;
import org.hibernate.annotations.CascadeType;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.Table;

@Entity
@Table(name = "DIAS_USUARIO_TIMESHEET")
public class DiasUsuarioTimeSheet {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "ID_DIAS_USUARIO_TIMESHEET",unique = true,nullable = false)
    private Long id;

    @Column(name = "DIAS_ID_DIAS", unique = true, nullable = false)
    private Dias dia;

    @ManyToOne
    @Cascade({CascadeType.MERGE, CascadeType.SAVE_UPDATE})
    @Column(name = "USUARIO_ID_USUARIO", unique = true, nullable = false)
    private Usuario usuario;

    @Column(name = "TIME_SHEET_ID_TIME_SHEET", unique = true, nullable = false)
    private TimeSheet timeSheet;

    public DiasUsuarioTimeSheet() {
    }

I have error in:

@OneToMany(mappedBy = "usuario",fetch = FetchType.LAZY)
@Cascade({CascadeType.ALL})
@Fetch(value = FetchMode.SELECT)
private Set<DiasUsuarioTimeSheet> diasUsuarioTimeSheetList;

'one to many' attribute value type should not be 'persistence entity'

解决方案

The following annotation

@Column(name = "USUARIO_ID_USUARIO", unique = true, nullable = false)

should be

@JoinColumn(name = "USUARIO_ID_USUARIO", nullable = false)

the unique=true attribute doesn't make sense, since it's a ManyToOne association: you'll obviously have several DiasUsuarioTimeSheets referencing the same user.

Similarly, the following annotation

@Column(name = "TIME_SHEET_ID_TIME_SHEET", unique = true, nullable = false)

must be replaced by

@ManyToOne
@JoinColumn(name = "TIME_SHEET_ID_TIME_SHEET", nullable = false)

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