如何设置相关实体​​（对象）的值

Question

我有两个具有关系的实体，关系工作正常，但是如何在控制器中将值从一个对象设置为另一个对象。

@Entity
@Table(name = "material_manu_calculator")
public class MaterialManuCalcu {

@Id
@GeneratedValue
@Column(name = "no")
private int no;

@ManyToOne
@JoinColumn(name = "order_id")
private OrderProductManu orderProductManu;

 //.....getters and setters and constructors}

下面是第二个实体

@Entity
@Table(name = "orders_products_manu")
public class OrderProductManu {

@Id
@GeneratedValue
@Column(name = "order_id")
private int orderManuId;

@OneToMany(cascade = CascadeType.ALL,mappedBy = "orderProductManu")
private List<MaterialManuCalcu> materialCalcu = new ArrayList<>();

 //.....getters and setters and constructors}


                                 

下面是仓库

   @Repository
   @Transactional
   public interface OrderProductManuRepository extends JpaRepository <OrderProductManu, Integer> {

   @Query(value  ="SELECT *FROM orders_products_manu  WHERE orders_products_manu.order_id =?", nativeQuery = true)
   public OrderProductManu getOrderProductById(int id);
   }

我想在控制器中设置 MaterilaManuCalcu 的值如下

@Controller
public class ProductsController {
@Autowired
private OrderProductManuRepository orderRepo;

   OrderProductManu orderProduct = orderRepo.getOrderProductById(1);

   MaterialManuCalcu manCalc = new MaterialManuCalcu();
   manCalc.setOrderProductManu(orderProduct.getOrderManuId()); 
   // I get the error says: 
   //    The method setOrderProductManu(OrderProductManu) in 
   //    the type MaterialManuCalcu is not applicable for the arguments (int)

更新：构造函数

    public MaterialManuCalcu(int no, int amountOrdered, int amountAvailable, int amountWillRemain,
        MaterialManu materialmanu, OrderProductManu orderProductManu) {
    this.no = no;
    this.amountOrdered = amountOrdered;
    this.amountAvailable = amountAvailable;
    this.amountWillRemain = amountWillRemain;
    this.materialmanu = materialmanu;
    this.orderProductManu = orderProductManu;
}

另一个

public OrderProductManu(int orderManuId, String customerName, int amountOrderedManu, String dateOrdered, Users users,
ProductsManu productsManu) {
this.orderManuId = orderManuId;
this.customerName = customerName;
this.amountOrderedManu = amountOrderedManu;
this.dateOrdered = dateOrdered;
this.users = users;
this.productsManu = productsManu;
}

更新：显示两个实体的创建方式

对于：OrderProductManu

   OrderProductManu orderProduct = new OrderProductManu();
   orderProduct.setDateOrdered("2021-04-14");
   orderProduct.setAmountOrderedManu(platenum);
   orderProduct.setCustomerName("Wapili Mteja");
   orderProduct.setUsers(userMoja.get(0));
   orderProduct.setProductsManu(typeofProduct);
   orderProductManus.setOrderManuId(007);//this is the value that I want to set inside 
   //MateriaManCalcu entity for property setOrderProductManu
   //You can check the relationship above

适用于：MaterialManuCalcu

   MaterialManuCalcu manCalc = new MaterialManuCalcu();
   manCalc.setAmountAvailable(availableSheets);
   manCalc.setAmountOrdered(sheetsNum);
   manCalc.setAmountWillRemain(sheetWillRemain);
   manCalc.setMaterialmanu(materialSheet);
   manCalc.setOrderProductManu(orderProduct);//doing this the whole object of 
   //orderProduct entity goes inside a one column in our MatrialManuCalcuof entity 

表格：ma​​terial_manu_calculator

我应该如何正确地做到这一点。提前致谢。

Answer 1

您正在尝试将通过调用int 类型的orderProduct.getOrderManuId() 返回的orderProduct 的ID 设置为OrderProductManu 类型的变量。 像这样manCalc.setOrderProductManu(orderProduct)