Count first time Requests per month per user type

first-request-per-month-per-user-type.js

const date1 = new Date("November 1, 2016 00:00:01");
const date2 = new Date("November 30, 2016 23:59:59");
  
db.requests.aggregate([
  {
    $match: {
      status: 'finished',
      booker: {$exists: true},
    }
  },
  {
    $group: {
      _id: '$booker',
      requests: {
        $push: {
          _id: '$_id',
          date: '$updatedAt'
        }
      }
    }
  },
  {
    $match: {
      'requests.date': {
          $not: {
              $gte: date2,
          }
      }
    }
  },
  {
    $unwind: '$requests'
  },
  {
    $match: {
        'requests.date': {
            $gte: date1
        }
    }
  },
  {
    $group: {
       _id: '$_id' 
    }
  }
]).map(function (x) {
    return [
      x,
      db.users.find({_id: x._id}).toArray(),
    ]
}).forEach(function (x) {
    print(JSON.stringify(x[1][0].profile.type))
});