Aggregate MongoDB results by ObjectId date

Question

How can I aggregate my MongoDB results by ObjectId date. Example:

Default cursor results:

cursor = [
    {\'_id\': ObjectId(\'5220b974a61ad0000746c0d         


        

Answer 1

The Jira Ticket pointed out by llovett has been solved, so now you can use date operators like $isoWeek and $year to extract this information from an ObjectId.

Your aggregation would look something like this:

{
    "$project":
        {

            "_id": {
                "$dateFromParts" : {
                    "year": { "$year": "$_id"},
                    "month": { "$month": "$_id"},
                    "day": { "$dayOfMonth": "$_id"}
                }
            }
        }
}