Error response when trying to save Objects

Data Service
1

Im trying make a Friend system by creating a column for a one to Many User Relationship.
When im trying to save the BackendlessUser array list with the user its returning the Faults responses

Object[] currentfriendObj = (Object[]) user.getProperty("friends");


if (currentfriendObj .length > 0) {
 currentfriends = (BackendlessUser[]) currentfriendObj ;

 if (currentfriends.length > 0) {


 newfriends = new BackendlessUser[currentfriends.length + 1];




 for (int i = 0; i < currentfriends.length; i++) {
 newfriends = currentfriends;


 }


 newfriends[newfriends.length - 1] = newUser;


}
user.setProperty("friends", newfriends);


Backendless.Persistence.save(user, new AsyncCallback&lt;BackendlessUser&gt;() {//NOT SAVING


 @Override
 public void handleResponse(BackendlessUser backendlessUser) {
 Log.i("hope", "SAVED!!!");
 }


 @Override
 public void handleFault(BackendlessFault backendlessFault) {
 Log.i("hope", "ERROR!!!!");


 }
});
2

Please provide the details of what the Fault object contains. We’d need to know the following:

    error code error message the "detail" string
All of these are documented here: https://backendless.com/documentation/data/android/error_handling.htm
3

error code : 1020

message :Missing ___class property for entity: friends

what you mean by the “detail” string

4

The “detail” string can be obtained using the getDetail() method on the fault object.

Please make sure you’re using the latest build of the Backendless library.

5

the detail string is “null”

and i am using latest libarary

6

What if you change the code to:

user.setProperty("friends", Arrays.asList( newfriends ) );
7

same result

8

What is the type of the “user” object?

9 
BackendlessUser user;
10

try changing this:

Backendless.Persistence.save(user, new AsyncCallback&lt;BackendlessUser&gt;() {

to this:

Backendless.Persistence.of( BackendlessUser.class ).save(user, new AsyncCallback&lt;BackendlessUser&gt;() {
11

sadly same result

12

Does the user object you save have any other properties?

13

just “name”

14

Ok, what does “newUser” object look like? Is it a registered user or just an object you created on the client side?

15

its a registered user

String whereClause = "name =" + "\'" + secondUser + "\'";
BackendlessDataQuery query = new BackendlessDataQuery();
QueryOptions queryOptions = new QueryOptions();
query.setWhereClause(whereClause);
queryOptions.addRelated("friends");
queryOptions.addRelated("friends.RELATION-OF-RELATION");
query.setQueryOptions(queryOptions);
Backendless.Persistence.of(BackendlessUser.class).find(query, new AsyncCallback&lt;BackendlessCollection&lt;BackendlessUser&gt;>() {
    @Override
    public void handleResponse(BackendlessCollection&lt;BackendlessUser&gt; secUser) {




       newUser = secUser.getCurrentPage().get(0);
16

Thanks. What is your application id?