mongo logs by intervals

analytics.js

var until = new Date(2015,1,1);
var since = new Date(2010,1,1);
var digestor = '535b97507899a672c49dd490'

db.logs.aggregate([
    {
        $match: {
            time: {
                $gt: 0
            },
            date: {
                $gte: new Date(since),
                $lt: new Date(until)
            },
            status: {
                $gte: 100
            },
            digestor: ObjectId(digestor)
        }
    },
    {
        $project: {
            _id: 0, // let's remove bson id's from request's result
            status: 1,
            success: { $cond: [{$lt: ['$status', 400]}, 1, 0]}, // add 1
            error: { $cond: [{$gte: ['$status', 400]}, 1, 0]},
            cache: { $cond: [{$eq: ['$status', 304]}, 1, 0]},
            bytesOut: {$ifNull: ['$responseHeaders.content-length', 0]},
            //date: {year: {$year: '$date'}, month: {$month: '$date'}, day: {$dayOfMonth: '$date'}}
            //timestamp: {day: {$dayOfMonth: '$date'}},
            timestamp: {year: { $year: '$date' }, day: {$dayOfMonth: '$date'}, month: { $month: '$date' }, hour: { $hour: '$date'}, minute: { $minute: '$date'}},
            date: '$date',
            index: { $const:[0,1] },
            method: 1
            //date: { hour: { $hour: '$date' } }
        }
    },
    {
        $group: {
            //_id: {c: '$country', n: '$name' },
            _id: { method:'$method', minute: '$timestamp.minute'},
            error: { $sum: '$error'},
            success: { $sum: '$success' },
            cache:  { $sum: '$cache' },
            bytesOut: { $sum: '$bytesOut' },
            total: { $sum: 1 },
        }
    },
    {
        $project: {
            _id: 0,
            method: '$_id.method',
            ts: '$_id.minute',
            dataset: {
                ts: '$_id.minute',
                out: '$bytesOut'
            }
        }
    },
    {
        $group: {
            _id: '$method',
            dataset: {
                $push: { 
                    ts: '$dataset.ts',
                    out: '$dataset.out',
                }
            }
        }
    },
    {
        $project: {
            _id: 1,
            ts: '$dataset.out'
        }
    }
 ])