{
    "_id": {
        "$oid": "5776e508ec9af0f005881f04"
    },
    "updatedAt": {
        "$date": "2016-07-01T21:47:52.785Z"
    },
    "created_at": {
        "$date": "2016-07-01T21:47:52.785Z"
    },
    "owner": {
        "$oid": "573a02d8fd05850b05adf26d"
    },
    "total": 5,
    "items": [
        {
            "itemId": {
                "$oid": "5760b897ea98f8b50a8010dd"
            },
            "_id": {
                "$oid": "5776e508ec9af0f005881f05"
            },
            "price": 5,
            "cartQuantity": 1,
            "itemName": "Advil Extra Strength"
        }
    ],
    "__v": 0
}

app.get('/testRoute/:userId', function(req, res, next) {

        var start = new Date(2016, 7, 1);
        var end = new Date(2016, 7, 30);

        Sale
        .find({ owner: req.params.userId, created_at: {$gte: start, $lt: end}})
        .exec(function(err, allSales) {
            if (err) { return next(err); } //check for error
            res.status(200).json(allSales);
        });

    });