Sort by date in mongoose aggregation framework

Question

Im working on a nodejs+mongodb project using mongoose. Now I have come across a question I don\'t know the answer to. I am using aggregation framework to get grouped results. T

Answer 1

I got stuck with the same problem, thanks for your answer. But I found out that you can get the same result with less code

MyModel.aggregate([
            {$match: {$and: [{created_date: {$gte: start_date}}, {created_date: {$lte: end_date}}]}},
            {$group: {
                _id: {
                    year: {$year: "$created_at"},
                    month: {$month: "$created_at"},
                    day: {$dayOfMonth: "$created_at"}
                },
                count: {$sum: 1}
            }},
            {$project: {
                date: "$_id", // so this is the shorter way
                count: 1,
                _id: 0
            }},
            {$sort: {"date": 1} } // and this will sort based on your date
        ], callback);

Answer 2

It appears that this question has a very simple answer :) Just need to sort by multiple nesteed columns like this:

{$sort: {"date.year":1, "date.month":1, "date.day":1}}

Answer 3

This would work if you are only sorting by date if you had other columsn to sort on. YOu would need to expand _id