onetomany / manytoone 的无限循环？ 春天/休息api

Question

I chose to have a many-to-one relationship from the shelves to the warehouses! My problem is that when I add to the table with the shelves the foreign key of the table with the repositories then I get an ifnite loop with data, I tried to solve it with jsonignore \/ jsonmanagerefernce \/ jsonbackreference but then my server 415 has a problem. happen to any of you to help me? I think the connection of my tables is to blame but I do not know what to do ..

@Entity
@Table(name="warehouse")
//@Access(AccessType.FIELD)
public class Warehouse {

        @Id
        @GeneratedValue(strategy = GenerationType.IDENTITY)
        @Column(name="id_warehouse")
        private Long id_warehouse;
    
        @Column(name="description_warehouse")
        private String description_warehouse;
    
        @OneToMany(mappedBy = "war_id")
        private List<Shelve> shelves = new ArrayList<>();
    
        @OneToMany(mappedBy = "war_id")
        private List<Management> managements = new ArrayList<>();
    
        public Warehouse() {
        }
//getter setter

Answer 1

You have wrong connections, you need a total refactor and understand the main ideas of the relationship's please look the link bellow:

https://dev.to/jhonifaber/hibernate-onetoone-onetomany-manytoone-and-manytomany-8ba

Answer 2

If anyone has the same issue try to put @JsonIgnore ! and add at your application properties this: spring.jackson.serialization.fail-on-empty-beans=false !

Answer 3

You can put @JsonManagedReference in Entity Warehouse and @JsonBackReference in Entity Shelve. It will work fine for retrieving data.

Answer 4

你可以使用三个@JsonManagedReference @JsonBackReference @JsonIgnore 之一

Answer 5

you can use @JsonIgnoreProperties on property relation and put property name

@JsonIgnoreProperties("shelves")
@ManyToOne(fetch = FetchType.LAZY)
@JoinColumn(name = "war_id", referencedColumnName = "id_warehouse")
private Warehouse war_id;

@JsonIgnoreProperties("war_id")
@OneToMany(mappedBy = "war_id")
private List<Shelve> shelves = new ArrayList<>();

or you can use @JsonManagedReference put on @OneToMany and @JsonBackReference put on @ManyToOne