java - Serialize bi-directional JPA entities to JSON with jackson -

i'm using jackson serialize jpa model json.

i have following classes:

import com.fasterxml.jackson.annotation.*; import javax.persistence.*; import java.util.set;  @jsoninclude(jsoninclude.include.non_null) @jsonignoreproperties(ignoreunknown = true) @jsonidentityinfo(generator = objectidgenerators.propertygenerator.class) @entity public class parent {   @id   @generatedvalue(strategy = generationtype.identity)   private long id;   private string name;    @jsonmanagedreference   @onetomany(mappedby = "parent", cascade = cascadetype.all, fetch = fetchtype.eager)   private set<child> children;    //getters , setters } 

and

import com.fasterxml.jackson.annotation.*; import javax.persistence.*; import java.util.hashset; import java.util.set;  @jsoninclude(jsoninclude.include.non_null) @jsonignoreproperties(ignoreunknown = true) @jsonidentityinfo(generator = objectidgenerators.intsequencegenerator.class) @entity public class child {   @id   @generatedvalue(strategy = generationtype.identity)   private long id;   private string name;    @jsonbackreference   @manytoone   @joincolumn(name = "parentid")   private parent parent;    //getters , setters } 

i'm using pojo mapping serialize model json. when serialize parent object following json:

{   "id": 1,   "name": "john doe",   "children": [     {       "id": 1,       "name": "child1"     },{       "id": 2,       "name": "child2"     }   ] } 

but when serialize child following json:

{   "id": 1,   "name": "child1" } 

the reference parent missing. there way solve this?

i think have chose between @jsonidentityinfo , @jsonbackreference/@jsonmanagedreference.

i go : @jsonidentityinfo(generator = objectidgenerators.propertygenerator.class, property="id") on entities, removes @jsonbackreference/@jsonmanagedreference pairs.

and add @jsonignore on fields want exclude.