java - Realm can't create Nested Objects from Json -

i've been trying create nested realmobject using json creates first object , not nested ones. appreciate on this.

my realm classes:

content.java

public class content extends realmobject {     private string uuid;     realmlist<contentdetailmodel> contentdetail;      public content() {         super();         this.uuid = uuid.randomuuid().tostring();      }      public string getuuid() {         return uuid;     }      public realmlist<contentdetailmodel> getcontentdetails() {         return contentdetail;     }      public void setcontentdetails(realmlist<contentdetailmodel> contentdetails) {         this.contentdetail = contentdetails;     } } 

contentdetailmodel.java:

public class contentdetailmodel extends realmobject {     string filename;     string contenttypeid;     realmlist<contentdetailmetadatamodel> contentdetailmetadata;     realmresults<content> content = null;     public string getfilename() {         return filename;     }      public void setfilename(string filename) {         filename = filename;     }      public string getcontenttypeid() {         return contenttypeid;     }      public void setcontenttypeid(string contenttypeid) {         contenttypeid = contenttypeid;     }      public realmlist<contentdetailmetadatamodel> getcontentdetailmetadata() {         return contentdetailmetadata;     }      public void setcontentdetailmetadata(realmlist<contentdetailmetadatamodel> contentdetailmetadataz) {         this.contentdetailmetadata = contentdetailmetadataz;     } } 

and rest of nested classes these. json string follows:

"

{    "content":{       "contentdetail":[          {             "filename":"test.mp3",             "contenttypeid":3,             "contentdetailmetadata":{                "metadata":[                   {                      "id":2,                      "value":"2017-08-02 09:40:30"                   },                   {                      "id":1,                      "value":"35.73876557934912,51.50785446166992"                   }                ]             }          },          {             "filename":"2.jpg",             "contenttypeid":2,             "contentdetailmetadata":[                {                   "metadata":{                      "id":2,                      "value":"2017-08-02 09:40:30"                   }                },                {                   "metadata":{                      "id":1,                      "value":"35.73876557934912,51.50785446166992"                   }                }             ]          }       ]    } } 

"

and code use :

realm.createobjectfromjson(json) 

{    "content":{       "contentdetail":[          {             "filename":"test.mp3",             "contenttypeid":3,             "contentdetailmetadata":[{                "metadata":[                   {                      "id":2,                      "value":"2017-08-02 09:40:30"                   },                   {                      "id":1,                      "value":"35.73876557934912,51.50785446166992"                   }                ]             }]          }, 

translates to:

public class root extends realmobject {     private content content; }  public class content extends realmobject {     private realmlist<contentdetail> contentdetail;      @linkingobjects("content")      private final realmresults<root> roots = null; }  public class contentdetail extends realmobject {     private string filename;     private long contenttypeid;     //private contentdetailmetadata contentdetailmetadata;     private realmlist<contentdetailmetadata> contentdetailmetadata;      @linkingobjects("contentdetail")      private final realmresults<content> contents = null; }  public class contentdetailmetadata extends realmobject {     private realmlist<metadata> metadata;      @linkingobjects("contentdetailmetadata")      private final realmresults<contentdetail> contentdetails = null; }  public class metadata extends realmobject {     private long id;     private string value;      @linkingobjects("metadata")      private final realmresults<contentdetailmetadata> contentdetailmetadatas = null; } 

if schema doesn't that, createorupdatefromjson() won't work.

personally advise against using schema though, it's pretty bad realm schema. it's advisable parse json , map schema makes more sense!