Jackson: Multiple back-reference properties with name 'defaultReference'

Question

I'm trying to map a json (string format) to an object and I get the following error

com.fasterxml.jackson.databind.JsonMappingException: Multiple back-reference properties with name 'defaultReference'

This is the json string

{"pledge":"74","client":"66","date":"","originId":"1","qualityId":"2","grade":"19","packing":"4","tons":"1000","fromDate":"","toDate":"","type":0,"remark":"","status":0,"area":"1531","id":-1,"refNumber":"","log":"","user":""}

This is the object

@Entity
@Table(name="movement", catalog = "wsmill3")
public class MovementView implements java.io.Serializable {
    private Integer id;
    private Integer originId;
    private Integer qualityId;
    private String refNumber;
    private Integer client;
    private String clientRef;
    private Integer grade;
    private Integer packing;
    private Integer pledge;
    private Integer area;
    private Date date;
    private Double tons;
    private Date fromDate;
    private Date toDate;
    private String remark;
    private User user;
    private Byte status;
    private String log;
    private Byte type;
    //constructor, getter and setter

and this is the code to do mapping

String data = request.getParameter("data");
ObjectMapper mapper = new ObjectMapper();
MovementView movement = mapper.readValue(data, MovementView.class);

I have no idea with this error, I did exact the same way as I read on Jackson homepage. Anyone who knows about it, please help me

Answer 1

I think the best way to handle this is using @JsonIdentityInfo annotation.see the thread which demonstrate this.How to use @JsonIdentityInfo with circular references?

Answer 2

If you use @JsonBackReference on more than one getter/setter method in your project, you should distinguish them with a specific reference name.

Maybe only one 'defaultReference' is allowed in the latest version?

e.g

In MovementView.java

@JsonBackReference(value="user-movement")
public User getUser() {
    return user;
}

In User.java

@JsonManagedReference(value="user-movement")
public MovementView getMovementView() {
    return movementView;
}