Agregasi Mongo / Mongoose - masalah $redact dan $cond

Anda dapat mencoba $facet dengan $addFields untuk agregasi paralel di 3.4 versi.

Ini akan mengurangi kerumitan keseluruhan dan Anda dapat menjalankan pengelompokan dengan input yang cocok sendiri secara bersamaan.

Kode di bawah ini membangun pipeline agregasi secara dinamis berdasarkan objek permintaan.

// Sample request
var request = {
  "name":"RINGGO",
  "year": 2017,
  "month":3,
  "week":12
};

// Build initial match document on name

var match1 = {
  name: request["name"]
};

// Build project & facet document for date based aggregation

var addFields = {};
var facet = {};

// Add year followed by year facet

if (request["year"]) {
    addFields["year"] = { "$year": "$date" },
    facet["Yearly"] = 
      [
        {
          "$match":{ "year": request["year"] }
        },
        {
          "$group": {
            "_id": {
              "name": "$name",
              "year": "$year"
            },
            "spend": { "$push":"$amount" },
            "total": { "$sum": "$amount" }
        }
      }
    ];
}

// Add month followed by month facet

if (request["month"]) {
    addFields["month"] = { "$month": "$date" };
    facet["Monthly"] = 
      [
        {
          "$match":{ "month": request["month"] }
        },
        {
          "$group": {
            "_id": {
              "name": "$name",
              "month": "$month"
            },
            "spend": { "$push":"$amount" },
            "total": { "$sum": "$amount" }
         }
      }
    ];
}

// Add week followed by week facet

if (request["week"]) {
    addFields["week"] = { "$week": "$date" };
    facet["Weekly"] = 
      [
        {
          "$match":{ "week": request["week"] }
        },
        {
          "$group": {
            "_id": {
              "name": "$name",
              "week": "$week"
            },
            "spend": { "$push":"$amount" },
            "total": { "$sum": "$amount" }
         }
      }
    ];
}

// Use aggregate builder

statements.aggregate()
        .match(match1)
        .append({"$addFields": addFields}) // No addFields stage in mongoose builder
        .facet(facet)
        .exec(function(err, data) {});

Mongo Shell Query untuk name/year/month/week kriteria.

db.statements.aggregate({
    '$match': {
        name: 'RINGGO'
    }
}, {
    '$addFields': {
        year: {
            '$year': '$date'
        },
        month: {
            '$month': '$date'
        },
        week: {
            '$week': '$date'
        }
    }
}, {
    '$facet': {
        Yearly: [{
                '$match': {
                    year: 2017
                }
            },
            {
                '$group': {
                    _id: {
                        name: '$name',
                        year: '$year'
                    },
                    spend: {
                        '$push': '$amount'
                    },
                    total: {
                        '$sum': '$amount'
                    }
                }
            }
        ],
        Monthly: [{
                '$match': {
                    month: 3
                }
            },
            {
                '$group': {
                    _id: {
                        name: '$name',
                        month: '$month'
                    },
                    spend: {
                        '$push': '$amount'
                    },
                    total: {
                        '$sum': '$amount'
                    }
                }
            }
        ],
        Weekly: [{
                '$match': {
                    week: 12
                }
            },
            {
                '$group': {
                    _id: {
                        name: '$name',
                        week: '$week'
                    },
                    spend: {
                        '$push': '$amount'
                    },
                    total: {
                        '$sum': '$amount'
                    }
                }
            }
        ]
    }
})

Contoh Respon

    {
    "Yearly": [{
        "_id": {
            "name": "RINGGO",
            "year": 2017
        },
        "spend": [-3.3, -6.3, -3.3, -6.3, -3.3, -3.3],
        "total": -25.799999999999997
    }],
    "Monthly": [{
        "_id": {
            "name": "RINGGO",
            "month": 3
        },
        "spend": [-3.3, -6.3, -3.3, -6.3, -3.3, -3.3],
        "total": -25.799999999999997
    }],
    "Weekly": [{
        "_id": {
            "name": "RINGGO",
            "week": 12
        },
        "spend": [-6.3, -3.3],
        "total": -9.6
    }]
}

Anda dapat menjalankan agregasi serupa untuk Year/Month dan Year nilai masukan.

Ini terjadi di $group 1 di mana $week agregasi menggulung masing-masing dari dua tanggal [15, 16] jumlah ke minggu 11 dan dua tanggal lainnya [22, 23] jumlah ke minggu 12 kemudian muncul sebagai jumlah total di MonthySpends .