Querying MongoDB in Node.JS

gistfile1.js

mongoose.connection.db.collection('quests', function(err, coll) {
     coll.insert({'goal': 'Explore a new land', 'level': 1});
     coll.update({'goal': 'Explore a new land'},
                 {'$set': {'reward.gold': 150}});
     coll.find({'level': {'$lte': 4}}).toArray(function (err, result) {
                                                    console.log(result);
                                               });
                                            });