无法使用spring JPararePository持久化数据

Question

我创建了一个简单的3实体数据模型，当试图持久化数据时，它不起作用。下面是实体及其id类,server：

@Entity
@Data
public class Server {

    @Id
    private String name;

    private String serverUrl;

    @OneToMany(mappedBy = "server", fetch = FetchType.LAZY)
    private List<Service> services;
}

服务：

@Entity
@IdClass(ServiceId.class)
public class Service {

    @Id
    private String name;

    @Id
    @ManyToOne(fetch = FetchType.LAZY)
    private Server server;

    @OneToMany(mappedBy = "service", fetch = FetchType.EAGER)
    private List<Container> containers;
}

public class ServiceId implements Serializable {

    private String name;

    private Server server;
}

容器：

@Entity
@IdClass(ContainerId.class)
public class Container {

    @Id
    private String name;

    @Id
    @ManyToOne(fetch = FetchType.LAZY)
    private Service service;

    private String command;
    private String state;
    private String ports;
}

@Data
public class ContainerId implements Serializable {

    private String name;

    private Service service;
}

public interface ServiceRepository extends JpaRepository<Service, ServiceId>    {
}

public class SomeClass{

    @Autowired
    ServiceRepository serviceRepository;

    @Transactional
    public void insertServices(Service service) {
        serviceRepository.save(service); <- Exception HERE!
    }
}

创建的数据库似乎正常：

Answer 1

我在当前项目中也遇到了类似的复合键问题。
也许我错了，但对我来说，@idclass似乎只有在@id带注释的属性都不是外键的情况下才起作用。我最终使用@embeddedid重构了实体。

...

实际上，我还有一个想法：尝试将@ManyToOne批注也添加到ServiceID类的Server属性：

public class ServiceId implements Serializable {

    private String name;

    @OneToMany(mappedBy = "service", fetch = FetchType.EAGER)
    private Server server;
}