堅持使用spring crud repository的一對多關係

Question

我試圖堅持一個訂單實體，其中有支付實體列表。保存操作是級聯的，因此保存訂單將保存其中的所有付款。訂單表具有orderid，price，qty和Payment表具有orderid，paymentid，value，創建和更新。在保存訂單時，通過orderid自動生成的訂單可以完美地保存訂單，但對於付款，一切都很好，除了orderid即將發生空。訂單表中的訂單應分配給付款表中的訂單。請幫忙。

Order.java

@Entity 
@Table(schema="public") 
@NamedQuery(name="Order.findAll", query="SELECT o FROM Order o") 
public class Order implements Serializable { 
    private static final long serialVersionUID = 1L; 

    @Id 
    @GeneratedValue(strategy=GenerationType.AUTO) 
    private int orderid; 

    private Integer price; 

    private Integer qty; 

    //bi-directional many-to-one association to Payment 
    @OneToMany(mappedBy="order", fetch=FetchType.EAGER,cascade=CascadeType.ALL) 
    private List<Payment> payments; 

    public Order() { 
    } 

    public Integer getPrice() { 
     return this.price; 
    } 

    public void setPrice(Integer price) { 
     this.price = price; 
    } 

    public Integer getQty() { 
     return this.qty; 
    } 

    public void setQty(Integer qty) { 
     this.qty = qty; 
    } 

    public int getOrderid() { 
     return orderid; 
    } 

    public void setOrderid(int orderid) { 
     this.orderid = orderid; 
    } 

    public List<Payment> getPayments() { 
     return this.payments; 
    } 

    public void setPayments(List<Payment> payments) { 
     this.payments = payments; 
    } 

    public Payment addPayment(Payment payment) { 
     if(payment!=null){ 
      payment.setOrder(this); 
      getPayments().add(payment);   
     }  

     return payment; 
    } 

    public Payment removePayment(Payment payment) { 
     getPayments().remove(payment); 
     payment.setOrder(null); 

     return payment; 
    } 

    @Override 
    public String toString() { 
     return "Order [orderid=" + orderid + ", price=" + price + ", qty=" + qty + ", payments=" + payments + "]"; 
    } 

} 

payment.java

@Entity 
@Table(schema="public") 
@NamedQuery(name="Payment.findAll", query="SELECT p FROM Payment p") 
public class Payment implements Serializable { 
    private static final long serialVersionUID = 1L; 

    @Temporal(TemporalType.DATE) 
    private Date created; 

    @Id 
    @GeneratedValue(strategy=GenerationType.AUTO) 
    private Integer paymentid; 

    @Temporal(TemporalType.DATE) 
    private Date updated; 

    private Integer value; 

    //bi-directional many-to-one association to Order 
    @ManyToOne(cascade=CascadeType.ALL) 
    @JoinColumn(name="orderid", referencedColumnName="orderid") 
    private Order order; 

    public Payment() { 
    } 

    public Date getCreated() { 
     return this.created; 
    } 

    public void setCreated(Date created) { 
     this.created = created; 
    } 

    public Integer getPaymentid() { 
     return this.paymentid; 
    } 

    public void setPaymentid(Integer paymentid) { 
     this.paymentid = paymentid; 
    } 

    public Date getUpdated() { 
     return this.updated; 
    } 

    public void setUpdated(Date updated) { 
     this.updated = updated; 
    } 

    public Integer getValue() { 
     return this.value; 
    } 

    public void setValue(Integer value) { 
     this.value = value; 
    } 

    public Order getOrder() { 
     return this.order; 
    } 

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

    @Override 
    public String toString() { 
     return "Payment [created=" + created + ", paymentid=" + paymentid + ", updated=" + updated + ", value=" + value 
       + ", order=" + order + "]"; 
    } 

} 

orderController.java

@RestController 
public class OrderController { 

    @Autowired 
    OrderService orderService; 
    @Autowired 
    PaymentService paymentService; 

    @RequestMapping(method=RequestMethod.PUT, value="/order") 
    public void createOrder(@RequestBody Order o){ 
     System.out.println(o); 
     orderService.createOrUpdateOrder(o); 
     System.out.println("Order Created"); 
    } 
    @RequestMapping(method=RequestMethod.POST, value="/order") 
    public void updateOrder(@RequestBody Order o){ 
     orderService.createOrUpdateOrder(o); 
     System.out.println("Order Updated"); 
    } 

    @RequestMapping(method=RequestMethod.DELETE, value="/order") 
    public void deleteOrder(@RequestBody Order o){ 
     orderService.deleteOrder(o); 
     System.out.println("Order Deleted"); 
    } 

    @RequestMapping(method=RequestMethod.PUT, value="/payment") 
    public void createPayment(@RequestBody Order o){ 
     paymentService.createOrUpdatePayments(o); 
     System.out.println("Payment Created"); 
    } 
    @RequestMapping(method=RequestMethod.POST, value="/payment") 
    public void updatePayment(@RequestBody Order o){ 
     paymentService.createOrUpdatePayments(o); 
     System.out.println("Payment Updated"); 
    } 

    @RequestMapping(method=RequestMethod.DELETE, value="/payment") 
    public void deletePayment(@RequestBody Order o){ 
     paymentService.deletePayments(o);; 
     System.out.println("Payment Deleted"); 
    } 
} 

orderservice.java

@Service 
public class OrderService { 

    @Autowired 
    OrderRepository orderRepository; 

    public void createOrUpdateOrder(Order o){ 
     orderRepository.save(o); 

    } 
    public void deleteOrder(Order o){ 
     orderRepository.delete(o.getOrderid()); 

    } 

    public Order getOrderDetails(Order o){ 
     return orderRepository.findOne(o.getOrderid()); 
    } 
} 

OrderRepository.java

@Repository 
public interface OrderRepository extends CrudRepository<Order, Integer> { 
} 

輸出：

Order Table

Payment table where orderid is null

Answer 1

可以在服務createOrUpdateOrder試試這個，讓我知道
可能是你能找到比這更好的

public void createOrUpdateOrder(Order o){ 
    List<Payment> payments = new ArrayList<>(); 
    for(Payment payment : order.getPayments()) { 
     payment.setOrder(order); 
     payments.add(payment); 
    } 
    order.setPayments(payments); 
    orderRepository.save(o); 
}