Wsrtjtyk

I am wondering if the error and result parameters in nested MongoDB queries need different names than those used by their parent/s.

The following is just an example of a nested scenario's structure, not an actual set of updates.

var filter_1 = { _id: o_id };

var update_1 = { $set: { title: title } };

var options_1 = {};



collection.findOneAndUpdate(filter_1, update_1, options_1, function(error, result) {

    if (error) {

        res.send(error);

    } else {



        console.log(result);



        // BEGIN perform a subsequent update



        var filter_2 = { _id: o_id };

        var update_2 = { $set: { genre: genre } };

        var options_2 = {};



        collection.findOneAndUpdate(filter_2, update_2, options_2, function(error, result) {

            if (error) {

                res.send(error);

            } else {



                console.log(result);

                res.json( { result: result } ); 



            }

        });



        // END perform a subsequent update



    }

});

Can both the first and second update use:

function(error, result) {

    if (error) {

        res.send(error);

    } else {...

Or does the nested update need to be something like:

function(error_2, result_2) {

    if (error_2) {

        res.send(error_2);

    } else {...

I am assuming it is the former, and error and result can be used in both updates, as the parameters would be restricted to their own function's scope, but just thought I would check.