aggregation.js

classCount: function() {

	// Attempt aggregation of the books table to count by class, maybe.
	var db = MongoInternals.defaultRemoteCollectionDriver().mongo.db;
	var col = db.collection("books");
	var aggregateSync = Meteor._wrapAsync(col.aggregate.bind(col));
	var pipeline = [
		{$group: {_id: "$class", count: {$sum: 1}}},
		{$sort: {_id: 1}}
	];

	var theAnswer = aggregateSync(pipeline);
	return theAnswer;

}