休眠映射字段作为主键和外键

Question

所以我有简单的关系客户端与他的类型。由于每个实体都通过id和源系统ID进行标识，因此我有无处不在的组合键。如何在保存客户端实体时自动保存类型？

Client类：

public class Client implements Serializable { 

    @EmbeddedId 
    private ClientKey primaryKey; 

    @ManyToOne 
    @JoinColumns({ 
     @JoinColumn(insertable = false, updatable = false, name = "client_type", referencedColumnName = "dict_id"), 
     @JoinColumn(insertable = false, updatable = false, name = "client_own_id", referencedColumnName = "dict_own_id"), 
    }) 
    private Type type; 

} 

主键

@Embeddable 
public class ClientKey implements Serializable { 

    @Column(name = "client_id") 
    private String clientId; 
    @Column(name = "client_own_id") 
    private String clientOwnId; 

} 

型类

@Entity 
public class Type implements Serializable { 

    @EmbeddedId 
    private DictKey primaryKey; //dict_id and dict_own_id 

    ... 
} 

当我运行代码：

clientRepo.create(client); //client contains setted type as typeRepo.getById(1). 

交易完成后，我保存了客户端，但client_type列包含null。从我所了解的问题是可插入/可更新= false。所以我设置好的

@JoinColumn(insertable = true, updatable = true, name = "client_type", referencedColumnName = "dict_id"), //true since I want to have updated client_type field 
@JoinColumn(insertable = false, updatable = false, name = "client_own_id", referencedColumnName = "dict_own_id"), //false since I have this field in primary key already 

然后我得到：

Mixing insertable and non insertable columns in a property is not allowed 

，所以我都设置为true：

@JoinColumn(insertable = true, updatable = true, name = "client_type", referencedColumnName = "dict_id"), //true since I want to have saved client_type field 
@JoinColumn(insertable = true, updatable = true, name = "client_own_id", referencedColumnName = "dict_own_id"), //true because I dont know why :D 

则：

repeated column in mapping for entity: Client column: client_own_id (should be mapped with insert="false" update="false") 

我没有更多的想法...

编辑：下面 看起来不错，只是当我有关系的客户端实体：

@ManyToOne(fetch = FetchType.LAZY) 
    @JoinColumns({ 
    @JoinColumn(insertable = false, updatable = false, name = "client_id", referencedColumnName = "client_id"), 
    @JoinColumn(insertable = false, updatable = false, name = "client_own_id", referencedColumnName = "client_own_id"), 
}) 
    private Client client; 

我'越来越

Unable to find column with logical name: client_own_id in client 

Answer 1

看起来你这里是什么就是客户端有一个情况一个复杂的密钥，部分来源于它与Type的关联。

在这种情况下，我觉得映射应如下：

实体类：

public class Client implements Serializable { 

    @EmbeddedId 
    private ClientKey primaryKey; 

    @MapsId("type") //maps to type in the EmbdeddedId 
    @ManyToOne 
    @JoinColumns({ 
     @JoinColumn(name = "client_type", referencedColumnName = "dict_id"), 
     @JoinColumn(name = "client_own_id", referencedColumnName = "dict_own_id") 
    }) 
    private Type type; 
} 

的EmbeddedId：

@Embeddable 
public class ClientKey implements Serializable { 
    @Column(name="client_id") 
    private String clientId; 

    @Embedded 
    private DictKey type; 

    //... 
}