请问play1中非serial, 非名为id 主键的Model应该怎么写?

Question

现有以下两个表

--系统模块
DROP TABLE center_model;
CREATE TABLE center_model
(
  model_code character varying(64) NOT NULL,
  model_name character varying(64) NOT NULL,
  modelgroup_code character varying(64) NOT NULL,
  CONSTRAINT pk_center_model PRIMARY KEY (model_code)
);
--系统模块分组
DROP TABLE center_modelgroup;
CREATE TABLE center_modelgroup
(
  modelgroup_code character varying(64) NOT NULL,
  modelgroup_name character varying(64) NOT NULL,
  CONSTRAINT pk_center_modelgroup PRIMARY KEY (modelgroup_code)
);


center_model.modelgroup_code  ManyToOne关联  center_modelgroup.modelgroup_code

这两个表的Model应该怎么写?? 可以做到查询时得到以下效果吗??

List<CenterModelGroup> groups = CenterModelGroup.findAll();
List<CenterModel> models = groups.get(0).models

或

CenterModel model = CenterModel.find("").first(); 
CenterModelGroup group = model.group;

Answer 1

class center_model extends GenericModel {
   @Id
   @Column(length=64)
   pubilc String modelgroup_code;
   
   .....

}

继承 GenericModel 外加 @Id 注解来自行指定 Id, 其他的 ManyToOne 按照 JPA 注解写就好了.