orlandov/node-mongodb

var sys     = require("sys");
var mongodb = require("../lib/mongodb");

var mongo = new mongodb.MongoDB();

mongo.addListener("close", function () {
	sys.puts("Closing connection!");
});

mongo.addListener("connection", function () {
	var widgets = mongo.getCollection('widgets');

	mongo.getCollections(function (collections) {
		sys.puts("the collections in the db are " + JSON.stringify(collections));
	});

	// remove widgets with shazbot > 0
	widgets.remove({ shazbot: { "$gt": 0 } });

	// actually, just remove all widgets
	widgets.remove();

	widgets.count(null, function(count) {
		widgets.insert({ foo: 1,    shazbot: 1 });
		widgets.insert({ bar: "a",  shazbot: 2 });
		widgets.insert({ baz: 42.5, shazbot: 0 });

		// count all the widgets
		widgets.count(null, function (count) {
			sys.puts("there are " + count + " widgets");
		});

		// count widgets with shazbot > 0
		widgets.count({ shazbot: { "$gt": 0 } }, function (count) {
			sys.puts(count + " widget shazbots are > 0");
		});

		// count shazbots less than or equal to 1
		widgets.count({ shazbot: { "$lte": 1 } }, function (count) {
			sys.puts(2 == count);
		});

		// return all widgets
		widgets.find(null, null, function (results) {
			// ...
		});

		// return widgets with shazbot > 0
		widgets.find({ shazbot: { "$gt": 0 } }, null, function (results) {
			// ...
		});

		// return only the shazbot field of every widget
		widgets.find({}, { "shazbot": true }, function (results) {
			// update shazbot of first document with shazbot 0 to 420
			widgets.update({ shazbot: 0 }, { shazbot: 420 });

			widgets.find(null, null, function (results) {
				results.forEach(function(r) {
					// ...
				});

				// close the connection
				mongo.close();
			});
		});
	});
});

mongo.connect({
	hostname: '127.0.0.1',
	port: 27017,
	db: 'mylittledb'
});