How to calculate sum of MongoDB fields?

Question

MongoDB

Hello! The question is. How to calculate the sum of fields for each user in MongoDB?
I can't figure out how to form the correct request.
uid = user id, count - column of fields to be counted for all users with a certain uid for a certain period of time.

today = datetime.datetime.now()
            count_day = db.logs.find({'uid': a['uid']}, {'date': {"$gt": today - datetime.timedelta(1)}}).count()

this is how I count the number of records, but you need to calculate the sum of count according to the same principle

Answer 1

db.logs.aggregate([
  {
    $match: { uid: a['uid'] }
  },
  {
    $group: {
      _id: '$uid',
      sum: { $sum: '$count' }
    }
  }
])

I tried it myself, it works, but I didn’t bother with the date, in theory, just add a condition to $match (possibly with the $and operator, but it might work)

$match: { uid: a['uid'], date: {"$gt": today - datetime.timedelta(1)} }