我有 2 个带有复合键的旧数据库实体，其中一个有一个带有@EmbeddedId注释的复合键。
// first entity
@Entity
public class Product {
@Id
private Integer productId;
// lookup table contains code-description pairs
@OneToOne
private ProductDefects defects;
//getters and setters and other code omitted
}
// lookup entity
@Entity
public class ProductDefects {
@EmbededId
private ProductDefectsPK id;
//getters and setters and other code omitted
}
//composite key
@Embedable
public class ProductDefectsPk{
private Integer realId;
private String category;
}
我应该如何定义@OneToOne要加入的关系，如下例所示：
select p.Id, pd.description
from Product p
inner join p.defects pd