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var db = Wub_GetDB("demavu");

var coll = Wub_GetCollection(db, "config");

if server == "-" then
   server = "staging"
end;

var queryObj = [. "server"=server, "varName" = varName .];
var setObj = [. "server"=server, "varName" = varName, "value" = value .];

var dbobj = Wub_NewDBObject(queryObj);
var upobj = Wub_NewDBObject([. "$set" = setObj .]);
var res = Wub_UpdateDB(coll, dbobj, upobj, true, true);
value;