JPA-OneToOne外键作为主键 [英] JPA - OneToOne Foreign key as primary key

问题描述

我有一个表，该表需要将其主键用作其他表的外键，因此是单向一对一关系.每本书只有一位作者，像这样:

I have a table which requires its primary key as a foreign key to other table, so an unidirectional one-to-one relationship. There will be only an author per book, like this:

@Entity
public class Author {
    @Id
    String code;

    //getters and setters ...
}


@Entity
public class Book {
    @Id
    @OneToOne
    @JoinColumn(name="code", columnDefinition="DOM_COD5")
    Author author;

    //getters and setters
}

使用普通的Hibernate和JPA批注可以很好地工作，但是通过Spring Data使用它，我一直收到此错误:

With plain Hibernate and JPA annotations it works well, but using using it through Spring Data I keep getting this error:

Caused by: java.lang.IllegalArgumentException: This class [class com.xxxx.api.catalogo.domain.Book] does not define an IdClass  

推荐答案

尝试这种方式

@Entity
public class Book {

    @Id
    @OneToOne
    @PrimaryKeyJoinColumn
    Author author;

    ...
}

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