在聚合中使用计数 MongoDB

Question

Using the aggregation below I'm trying to find the number of conversations solved by a Chatbot or Agent in office and out of office hours. With the aggregation below I'm getting a bunch of documents with the difference in solved and horario, which is 0 for out of office and 1 for in office conversations. My current result is the following:

How can I get the following result, which adds up all the documents depending on the solved and the horario:

solved: Clipbot
horario: 0
count: 300

and

solved: Clipbot
horario: 1
count: 320

and

solved: Agent
horario: 0
count: 200

and

solved: Agent
horario: 1
count: 320

My current Aggregation:

[{$match: {
  start_date: {
    $gte: ISODate('2020-06-01 00:00:01'),
    $lte: ISODate('2020-06-30 23:59:59')
  }
}}, {$project: {
  solved: "$solved",
  hour: {
    $hour: {
      date: '$start_date',
      timezone: 'America/Mexico_City'
    }
  }
}}, {$project: {
  solved: "$solved",
  horario: {
    $cond: [
      {
        $and: [
        {
          $gt: [
            '$hour',
              7
          ]
          },
          {
            $lt: [
              '$hour',
                22
            ]
          },
        ]
      },
    1,
    0
    ]
  }
}}]

Answer 1

You can do with $group , i have not added other fields that you have added in your query,

db.collection.aggregate([
  // you can add your $match conditions here
  {
    $group: {
      _id: {
        solved: "$solved",
        horario: "$horario"
      },
      count: { $sum: 1 },
      solved: { $first: "$solved" },
      horario: { $first: "$horario" }
    }
  },
  {
    $project: { _id: 0 }
  }
])

Working Playground: https://mongoplayground.net/p/gGWW7NXjaHy