Spring Rest Hibernate創建嵌套對象

Question

我有3個模型PaymentPlan，PaymentPlanDetail，PaymentPlanElement

PaymentPlan有一個或多個PaymentPlanDetail，PaymentPlanElement有一個或多個PaymentPlanDetail，

存在以下關系：

public class PaymentPlan{

  //

  @OneToMany(mappedBy = "paymentPlan",cascade = CascadeType.ALL)
  private List<PaymentPlanDetail> paymentPlanDetails= new ArrayList<>();  
}

public class PaymentPlanDetail{

  //

  @ManyToOne(name = paymentPlanElementId)
  private PaymentPlanElement paymentPlanElement;  
}

public class PaymentPlanElement{

  //

  @OneToMany(mappedBy = "paymentPlanElement",cascade = CascadeType.ALL)
  private List<PaymentPlanDetail> paymentPlanDetails= new ArrayList<>  
}

我發送看起來像的請求對象

 {
    name:'foo',

    paymentPlanDetails: [
      {
        name: 'bar',
        paymentPlanElement:{
          id: 12,
          style: 'baz'
        }
      }
    ]

  }

付款計划元素已經創建，我想發送JSON對象並保存包含付款計划詳細信息的付款計划，但是我收到了錯誤，即payment_plan_id is null ，有什么辦法可以在一次交易中做到這一點嗎？

編輯：我的PaymentPlan控制器

@RestController
@RequestMapping("/api/payment-plans")
@CrossOrigin(origins = "http://localhost:4200")
@RequiredArgsConstructor
public class PaymentPlanController {

  private final PaymentPlanService paymentPlanService;

  @PostMapping
  public PaymentPlan create(@RequestBody PaymentPlan paymentPlan) {
    return paymentPlanService.create(paymentPlan);
  }

}

和PaymentPland DTO

public interface PaymentPlanDao extends JpaRepository<PaymentPlan, Integer> { }

Answer 1

 @ManyToOne
 @JoinColumn(name="paymentPlan")  
 private PaymentPlan paymentPlan;

 Add this to Your PaymentPlanDetail Class As it will Map both the classes As Above map other class too.

希望能幫助到你。