如何将DTO映射到多个实体?

当我通过POST请求创建一个母实体时,我希望自动创建一个子实体。使用@OneToMany和@ManyToOne注释,效果很好。至少,只要我在MotherService中提供孩子的信息。

Mother.java

@Entity
@Table(name="mother")
public class Mother{
   @Id
   @Column(name="id", updatable = false, nullable = false)
   private Long id;

   @Column(name="name")
   private String name;

   @OneToMany(mappedBy = "mother", cascade = CascadeType.ALL, orphanRemoval = true)
   private List<Kid> kidList = new ArrayList<>();

   //constructor, getter, setter

   private void addKid(Kid kid) {
      this.kidList.add(kid);
      kid.setMother(this);
   }
}

@Entity
@Table(name="kid")
public class Kid{
   @Id
   @Column(name="id", updatable = false, nullable = false)
   private Long id;

   @Column(name="name")
   private String name;

   @ManyToOne(fetch = FetchType.LAZY)
   @JoinColumn(name = "mother_id", nullable=false)
   private Mother mother;

   //constructor, getter, setter
}

MotherController.java

@RestController
@RequestMapping("mothers")
public class MotherController {

   @Autowired
   private MotherService motherService;

   MotherController(MotherService motherService) {
       this.motherService = motherService;
   } 

   @PostMapping
   Mother createMother(@RequestBody Mother mother)  {
       return this.motherService.createMother(mother);
   }
}

MotherService.java

@Service
public class MotherService {

   private MotherRepository motherRepository;

   @Autowired
   public MotherService (MotherRepository motherRepository) {
       super();
       this.motherRepository= motherRepository;
   }

   public Mother createMother(Mother mother)  {

       Kid kid = new Kid("Peter");

       mother.addKid(kid);

       return this.motherRepository.save(mother);
   }
}

母亲和孩子的存储库扩展了JpaRepository,到目前为止没有任何自定义方法。

我的发帖请求类似(使用邮递员)

{
   "name":"motherName"
}

现在一个母亲的名字是“motherName”,一个孩子的名字是“Peter”。

我的想法:使用DTO

我现在尝试实现一个DTO,它包含母亲的名字和孩子的名字,将母亲服务中的信息映射到实体,并通过相应的存储库保存它们,这样我就可以在POST请求中定义这两个名字。

motherDto.java

public class mother {
   private String motherName;
   private String kidName;

   //getter, setter

}

{
  "motherName":"Susanne",
  "kidName":"Peter"
}

甚至更好

{
   "mother": {
       "name":"Susanne"
   },
   "kid": {
       "name":"Peter"
   }
}

一个名叫苏珊娜的母亲和一个名叫彼得的孩子被创造出来。

我的问题是

还是我做的不对?有没有更简单的方法来实现我的目标?