Hi,

I've made a collection named ‘UserInfo’ which contains following:

{
 "playerId": "571eccf3f528a1ccf4a19”,
 "inven": {
    "snCounter": 0,
    "chars": {}
  }
}

In cloud code,

var playerId = Spark.getPlayer().getPlayerId();
var col = Spark.runtimeCollection( "UserInfo" );
var doc = col.findOne( {"playerId":playerId} );

var newSn = ++doc.inven.snCounter;               // newSn is 1
var newChar = { "sn":newSn, "rank":1, "lv":1 };
doc.inven.chars[ newSn ] = newChar;               // assigned ‘undefined’

col.update(
        { 'playerId':playerId },
        { '$set':
            {
                'inven' : doc.inven
            }
        },
        false,
        false ); 

when I trace above code in debug mode, doc.inven.chars[ “1” ] is undefined.

I don’t understand why it can’t be assigned.

one more thing,

doc.inven.chars = { “1” : newChar };      // it works!
delete doc.inven.chars[ newSn ];           // nothing happened

Please help me...