Mongo query aggregate with a conditional group and another field

Question

I followed this post by @Blakes-Seven Mongodb aggregate $group for multiple date ranges

But I need to add an additional group by field \"$User.Account\" and I keep gett

Answer 1

You can follow below syntax to add another field in $group expression

db.logs.aggregate([
  { "$match": {
    "DateTime": { "$gte": ninetyDays },
    "Orgname": /Inc/
  }},
  { "$group": {
    "_id": {
      "User": "$User.Account",
      "date": {
        "$cond": [
          { "$lt": [ "$DateTime", sixtyDays ] },
          "61-90",
          { "$cond": [
            { "$lt": [ "$DateTime", thirtyDays ] },
            "31-60",
            "01-30"
          ]}
        ]
      }
    },
    "count": { "$sum": 1 },
  }},
  { "$sort": { "count": -1 }},
  { "$limit": 25}
])