JSON stringify no work...

gistfile1.js

// The following result from Parse.com query is great, has createdAt which is exactly what I want. Only thing is I want to cache this result on the device. If I JSON.stringify it, all I get is the attributes.
(
        {
        "_dirty" =         {
        };
        "_escapedAttributes" =         {
        };
        "_handleSetOp" = "<KrollCallback: 0xff4b850>";
        "_hashedJSON" =         {
        };
        "_mergeMagicFields" = "<KrollCallback: 0xff4b7d0>";
        "_previousAttributes" =         {
            checkin = 1727;
            user = "Ian Tearle";
        };
        "_refreshCache" = "<KrollCallback: 0xff48430>";
        "_setting" = 0;
        "_toPointer" = "<KrollCallback: 0xff445c0>";
        "_validate" = "<KrollCallback: 0xff4c010>";
        attributes =         {
            checkin = 1727;
            user = "Ian Tearle";
        };
        bind = "<KrollCallback: 0xff46300>";
        change = "<KrollCallback: 0xff481b0>";
        changedAttributes = "<KrollCallback: 0xff482b0>";
        cid = c1;
        className = checkin;
        clear = "<KrollCallback: 0xff4c2f0>";
        clone = "<KrollCallback: 0xff44410>";
        constructor = "<KrollCallback: 0xff4ae90>";
        createdAt = "2012-07-04T20:34:33.253Z";
        destroy = "<KrollCallback: 0xff43e90>";
        dirty = "<KrollCallback: 0xff4c410>";
        escape = "<KrollCallback: 0xff3ce70>";
        fetch = "<KrollCallback: 0xff4c320>";
        get = "<KrollCallback: 0xff47220>";
        getACL = "<KrollCallback: 0xff4c070>";
        has = "<KrollCallback: 0xff3cee0>";
        hasChanged = "<KrollCallback: 0xff48230>";
        id = rhFNSaPfov;
        initialize = "<KrollCallback: 0xff473c0>";
        isNew = "<KrollCallback: 0xff4c3a0>";
        isValid = "<KrollCallback: 0xff48620>";
        off = "<KrollCallback: 0xff49550>";
        on = "<KrollCallback: 0xff4aec0>";
        parse = "<KrollCallback: 0xff43eb0>";
        previous = "<KrollCallback: 0xff48520>";
        previousAttributes = "<KrollCallback: 0xff485a0>";
        relation = "<KrollCallback: 0xff472a0>";
        save = "<KrollCallback: 0xff44700>";
        set = "<KrollCallback: 0xff4c210>";
        setACL = "<KrollCallback: 0xff4c0e0>";
        toJSON = "<KrollCallback: 0xff47420>";
        trigger = "<KrollCallback: 0xff462a0>";
        unbind = "<KrollCallback: 0xff47320>";
        unset = "<KrollCallback: 0xff4c280>";
        updatedAt = "2012-07-04T20:34:33.253Z";
        validate = "<KrollCallback: 0xff4bf90>";
    },
        {
        "_dirty" =         {
        };
        "_escapedAttributes" =         {
        };
        "_handleSetOp" = "<KrollCallback: 0xff469b0>";
        "_hashedJSON" =         {
        };
        "_mergeMagicFields" = "<KrollCallback: 0xff46930>";
        "_previousAttributes" =         {
            checkin = 1727;
            user = "Ian Tearle";
        };
        "_refreshCache" = "<KrollCallback: 0xff464f0>";
        "_setting" = 0;
        "_toPointer" = "<KrollCallback: 0xff466f0>";
        "_validate" = "<KrollCallback: 0xff47760>";
        attributes =         {
            checkin = 1727;
            user = "Ian Tearle";
        };
        bind = "<KrollCallback: 0xff46180>";
        change = "<KrollCallback: 0xff46f80>";
        changedAttributes = "<KrollCallback: 0xff47080>";
        cid = c2;
        className = checkin;
        clear = "<KrollCallback: 0xff46b30>";
        clone = "<KrollCallback: 0xff46eb0>";
        constructor = "<KrollCallback: 0xff45f70>";
        createdAt = "2012-07-04T20:34:36.194Z";
        destroy = "<KrollCallback: 0xff46050>";
        dirty = "<KrollCallback: 0xff45fe0>";
        escape = "<KrollCallback: 0xff46840>";
        fetch = "<KrollCallback: 0xff46ba0>";
        get = "<KrollCallback: 0xff46750>";
        getACL = "<KrollCallback: 0xff477c0>";
        has = "<KrollCallback: 0xff468b0>";
        hasChanged = "<KrollCallback: 0xff47000>";
        id = XVqAOc36g8;
        initialize = "<KrollCallback: 0xff46410>";
        isNew = "<KrollCallback: 0xff46f10>";
        isValid = "<KrollCallback: 0xff47660>";
        off = "<KrollCallback: 0xff46090>";
        on = "<KrollCallback: 0xff45dd0>";
        parse = "<KrollCallback: 0xff46590>";
        previous = "<KrollCallback: 0xff47560>";
        previousAttributes = "<KrollCallback: 0xff475e0>";
        relation = "<KrollCallback: 0xff467d0>";
        save = "<KrollCallback: 0xff46c10>";
        set = "<KrollCallback: 0xff46a20>";
        setACL = "<KrollCallback: 0xff47830>";
        toJSON = "<KrollCallback: 0xff46470>";
        trigger = "<KrollCallback: 0xff46110>";
        unbind = "<KrollCallback: 0xff46390>";
        unset = "<KrollCallback: 0xff46ad0>";
        updatedAt = "2012-07-04T20:34:36.194Z";
        validate = "<KrollCallback: 0xff476e0>";
    },
        {
        "_dirty" =         {
        };
        "_escapedAttributes" =         {
        };
        "_handleSetOp" = "<KrollCallback: 0xff4a620>";
        "_hashedJSON" =         {
        };
        "_mergeMagicFields" = "<KrollCallback: 0xff4a5a0>";
        "_previousAttributes" =         {
            checkin = 1727;
            user = "Ian Tearle";
        };
        "_refreshCache" = "<KrollCallback: 0xff4a160>";
        "_setting" = 0;
        "_toPointer" = "<KrollCallback: 0xff4a360>";
        "_validate" = "<KrollCallback: 0xff47cd0>";
        attributes =         {
            checkin = 1727;
            user = "Ian Tearle";
        };
        bind = "<KrollCallback: 0xff49f80>";
        change = "<KrollCallback: 0xff496c0>";
        changedAttributes = "<KrollCallback: 0xff47a50>";
        cid = c3;
        className = checkin;
        clear = "<KrollCallback: 0xff4a770>";
        clone = "<KrollCallback: 0xff49460>";
        constructor = "<KrollCallback: 0xff49d70>";
        createdAt = "2012-07-05T18:19:05.388Z";
        destroy = "<KrollCallback: 0xff49e50>";
        dirty = "<KrollCallback: 0xff49de0>";
        escape = "<KrollCallback: 0xff4a4b0>";
        fetch = "<KrollCallback: 0xff495f0>";
        get = "<KrollCallback: 0xff4a3c0>";
        getACL = "<KrollCallback: 0xff47d30>";
        has = "<KrollCallback: 0xff4a520>";
        hasChanged = "<KrollCallback: 0xff49740>";
        id = y0tDWeu5dX;
        initialize = "<KrollCallback: 0xff4a070>";
        isNew = "<KrollCallback: 0xff494c0>";
        isValid = "<KrollCallback: 0xff47bd0>";
        off = "<KrollCallback: 0xff49e90>";
        on = "<KrollCallback: 0xff49bd0>";
        parse = "<KrollCallback: 0xff4a200>";
        previous = "<KrollCallback: 0xff47ad0>";
        previousAttributes = "<KrollCallback: 0xff47b50>";
        relation = "<KrollCallback: 0xff4a440>";
        save = "<KrollCallback: 0xff49660>";
        set = "<KrollCallback: 0xff4a690>";
        setACL = "<KrollCallback: 0xff47da0>";
        toJSON = "<KrollCallback: 0xff4a0e0>";
        trigger = "<KrollCallback: 0xff49f10>";
        unbind = "<KrollCallback: 0xff49ff0>";
        unset = "<KrollCallback: 0xff4a700>";
        updatedAt = "2012-07-05T18:19:05.388Z";
        validate = "<KrollCallback: 0xff47c50>";
    }
)