ios - Incrementing a field in a Parse Object. Result: TypeError: Object [object Object] has no method 'Increment' -

within "aftersave" method in parse, want increment field in parse object. object , increment in following way:

parse.cloud.aftersave("activity", function(request) {  if(request.object.get("type") == "joinedgame") {    var agameobject = request.object.get("togamer");    var gamerquery = new parse.query("gamer");    gamerquery.get(agameobject, {          success: function (obj) {               obj.increment("numberofplayers");               obj.save();             },             error: function(error) {                    console.log("failed: " +error.message);             }      });   } 

this code increments "numberofplayers" field many times "aftersave" function gets called , first "if" statement holds true. "obj" saved. incremented "numberofplayers" field shown in parse db. however, parse log shows following error:

result: typeerror: object [object object] has no method 'increment'

pretty sure it's increment , not increment.

here's example in parse something similar.