Play2/JPA/Ebean一對多映射，採用了複合的PrimaryKey

Question

我嘗試創建複合鍵多對一的關係，但是當我插入我的前S2豆我已經得到了這個錯誤：

[error] Caused by: org.h2.jdbc.JdbcSQLException: Duplicate column name "CODE1"; SQL statement: 
[error] insert into Pres2 (code1, code2, code3, champ1, code1) values (?,?,?,?,?) [42121-172] 

我謨是玩2.2.2。

你能幫我解決我的問題嗎？

我對豆PRES1第一ID類代碼：

@Embeddable 
public class ClePres1 implements Serializable { 
    private static final long serialVersionUID = 1L; 

    @Column(name = "code1") 
    private String code1; 

    @Override 
    public int hashCode() { 
    ... 
    } 
    @Override 
    public boolean equals(Object obj) { 
    ... 
    } 

我的豆PRES1代碼：

@Entity 
@Table(Name = "Pres1") 
public class Pres1 extends Model { 
    private static final long serialVersionUID = 1L; 

    @EmbeddedId 
    ClePres1 cle; 

    @OneToMany(mappedBy = "pres1") 
    private List<Pres2> listPres2; 

    ... 

我第二次爲豆ID類前S2代碼：

@Embeddable 
public class ClePres2 implements Serializable { 
    private static final long serialVersionUID = 1L; 
    @Column(name = "code1") 
    public String code1; 

    @Column(name = "code2") 
    public String code2; 

    @Column(name = "code3") 
    public String code3; 

    @Override 
    public int hashCode() { 
    ... 
    } 

    @Override 
    public boolean equals(Object obj) { 
    ... 
    } 

我的前S2豆：

@Entity 
@Table(name = "Pres2") 
public class Pres2 extends Model { 
    private static final long serialVersionUID = 1L; 

    @EmbeddedId 
    ClePres2 cle; 

    @Column(name = "champ1") 
    private String champ1; 

    @ManyToOne 
    @JoinColumns({ 
     @JoinColumn(name = "code1",referencedColumnName="code1") 
    }) 
    private Pres1 pres1; 

Answer 1

您可以在ClePres2嵌入類中配置code1列，也可以在Pres2類中配置@ManyToOne關係。如果您從ClePres2刪除code1，但如果您希望code1的嵌入ID爲Pres2，那麼請將下面的@ManyToOne關係配置爲避免插入code1列兩次。

@ManyToOne 
    @JoinColumns({ 
     @JoinColumn(name = "code1",referencedColumnName="code1",insertable = false, updatable = false) 
    }) 
    private Pres1 pres1;