getBatchItem not sniffing data types correctly

[cmcculloh]

Getting the following error:

{ name: 'AmazonError',
type: 'ValidationException',
serviceName: 'com.amazon.coral.validate',
message: 'One or more parameter values were invalid: Mismatching attribute types between location and schema',
statusCode: 400,
retry: [Getter] }

Basically it came down to that the range selector I was using was being passed through as a string instead of a number. This is even though I am chaining queries, having just gotten the range selector out of another table and am immediately using it in the query that is failing. The way I was able to fix it was by casting it from a string into a number (the way Amazon expects it to come across):

results.Items.forEach(function(element, index, array){
    console.log(element);

    element.events.SS.forEach(function(ielement, iindex, iarray){
        var batchVars = {"events": {keys:[ {hash: ielement, range: parseInt(element.timestamp.N)} ]}};
        dynode.batchGetItem(batchVars, events.debugOutput);
    }, query);
}, query);

Here's a gist with a lot more context:
https://gist.github.com/2502794

I know this code is probably all crap, I'm a complete newb to node.js & dynamoDB (not to mention dynode).

Thanks!