我正在使用Spring Boot和JPA为商家创建电子商务。在创建订单服务时遇到了一个问题。我只想在请求正文中传递嵌套对象的ID，而不是发送完整的嵌套对象，因为其大小将非常大。
这是我的代码。商家可以做许多订单

• • 订单**

@Entity
@Table(name = "Orders")
@XmlRootElement
@JsonIgnoreProperties({"hibernateLazyInitializer", "handler"})
public class Order extends BasicModelWithIDInt {

    @Basic(optional = false)
    @Column(name = "Quantity")
    private Integer quantity;

    @Basic(optional = false)
    @Size(min = 1, max = 150)

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

    @JoinColumn(name = "ProductID", referencedColumnName = "ID")
    @ManyToOne(optional = false, fetch = FetchType.LAZY)
    @JsonIgnoreProperties
    private Product productID;

    @JoinColumn(name = "MerchantID", referencedColumnName = "ID")
    @ManyToOne(optional = false, fetch = FetchType.LAZY)
    private Merchent merchent;

    @JoinColumn(name = "OrderSatusID", referencedColumnName = "ID")
    @ManyToOne(optional = false, fetch = FetchType.EAGER)
    private OrderStatus orderStatus;

      // Getters and Setters
}

• • 订单持有人**

public class OrderHolder {

    @NotNull
    private Order order;

    public Order getOrder() {
        return order;
    }

    public void setOrder(Order order) {
        this.order = order;
    }
}

• • 订单回购**

public interface OrderRepo extends JpaRepository<Order, Integer> {
}

• • 订单管理员**

@RestController
@RequestMapping(value = "order", produces = MediaType.APPLICATION_JSON_VALUE)
public class OrderRestController extends BasicController<OrderHolder>{

    @Autowired
    private OrderRepo orderRepo;

 

    @PostMapping("create")
    public ResponseEntity<?> create(@RequestBody @Valid OrderHolder orderHolder, Principal principal) throws GeneralException {
        log.debug( "create order {} requested", orderHolder.toString());
        Order order = new Order();
        order = orderHolder.getOrder();
        System.out.println("###############"+order);
        try {
            order = orderRepo.save(order);
            log.info( "Order {} has been created", order );
        } catch (Exception e) {
            log.error( "Error creating Order:  ", e );
            e.printStackTrace();
            throw new GeneralException( Errors.ORDER_CREATION_FAILURE, e.toString() );
        }
        return ResponseEntity.ok( order );
    }

}

我需要请求身体看起来像下面，而不是包括完整的商人和产品内的请求对象。