如何解决如何使用关系表SpringBoot查找实体
我正在尝试为交货创建API。所以我有Dish,Order和DishOrder实体,我要保存订单,但是当我尝试找到订单时,弹簧给了我这个错误:
Resolved [org.springframework.http.converter.HttpMessageNotWritableException: Could not write JSON: could not extract ResultSet; nested exception is com.fasterxml.jackson.databind.JsonMappingException: could not extract ResultSet (through reference chain: java.util.ArrayList[0]->com.XYZ.model.entity.Order["orderDish"])]
我的代码或多或少是这样的:
订单:
@OneToMany(fetch = FetchType.LAZY)
private List<OrderDish> orderDishes;
菜:
@OneToMany
@JsonIgnore
private List<OrderDish> orderDishes;
OrderDish:
@EmbeddedId
@JsonIgnore
private OrderDishId id;
OderDishId:
@JsonBackReference
@ManyToOne(fetch = FetchType.LAZY,optional = false)
@JoinColumn(name = "id_dish",nullable = false,insertable = false,updatable = false)
private Dish dish;
@ManyToOne(fetch = FetchType.LAZY,updatable = false)
private Order order;
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