将多对多关系映射到 DTO 对象

问题描述

您好，我想将实体类映射到 DTO 对象。

订单类：

@Data
@AllArgsConstructor 
@NoArgsConstructor
@Entity 
@Table(name = "ORDERS")
public class Order extends BaseEntity {

    @Column(name = "ORDER_DATE")
    private LocalDateTime orderDate;

    @Column(name = "TOTAL_PRICE")
    private double totalPrice;

    @OnetoMany(mappedBy = "order")
    Set<OrderPart> orderParts;
}

产品类别：

@Data 
@AllArgsConstructor 
@NoArgsConstructor
@Entity 
@Table(name = "PRODUCT")
public class Product extends BaseEntity {

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

    @Column(name = "PRICE")
    private double price;

    @OnetoMany(mappedBy = "product")
    Set<OrderPart> orderParts;
}

订单零件类：

@Data
@AllArgsConstructor 
@NoArgsConstructor
@Entity 
@Table(name = "ORDER_PART")
public class OrderPart extends BaseEntity {

    @Column(name = "QUANTITY")
    private int quantity;

    @ManyToOne
    @JoinColumn(name = "ORDER_ID")
    Order order;

    @ManyToOne
    @JoinColumn(name = "PRODUCT_ID")
    Product product;

    public double getPriceOfProduct() {
        return product.getPrice();
    }
}

此时我正在使用 mapstruct 中的映射器：

@Mapper(componentModel = "spring")
public interface WarehouseApiMapper {
    WarehouseApiMapper mapper = Mappers.getMapper(WarehouseApiMapper.class);

    @Mapping(target = "orderDate",dateFormat = "yyyy-MM-dd HH:mm")
    OrderDto OrderToOrderDto(Order order);
}

还有我的 DTO 课

@Data
public class OrderDto {

    private Integer id;
    private String orderDate;
    private Double totalPrice;
    private Set<ProductDto> products;

    public OrderDto(String orderDate,Double totalPrice) {
        this.orderDate = orderDate;
        this.totalPrice = totalPrice;
    }
}

我想将此关系映射到我的 OrderDto 对象。有没有办法自动映射它，或者我必须编写自己的映射器？感谢您的回答。

解决方法

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