[英]Mongo Aggregate - Calculating based on dates
Here is a sample document.这是一个示例文档。
{"_id":{"$oid":"5e557779ed588826d84cef11"},
"meter_id":"1001",
"date":{"$date":{"$numberLong":"1509474600000"}},
"parameter_name":"hvac","voltage":{"unit":"V"},
"current":{"unit":"AMP"},
"powerFactor":{"unit":"phi"},
"angle":{"unit":"degree"},
"activePower":{"unit":"kwh"},
"reactivePower":{"unit":"kwh"},
"apparentPower":{"unit":"kwh"},
"frequency":{"unit":"hz"},
"thd":{"unit":"percentage"},
"energy":{"Energy":"5.7"},
"power":{"unit":"watt"},
And there are around 100 000 documents.并且有大约 100 000 个文件。 I want to filter out the documents whose date is greater than the date i specify and calculate the total energy ie energy.Energy我想过滤掉日期大于我指定日期的文件并计算总能量,即energy.Energy
I used the below aggregation, but it doesn't seem to be working我使用了下面的聚合,但它似乎不起作用
const endDate = new Date(12-12-2018)
MeterData.aggregate([
{
$group: {
_id: "$meter_id",
total: { $sum: 1 },
totalEnergy: { $sum: { $toDouble: "$energy.Energy"
} },
dateSum: {
$sum: {
$toDouble: {
$not: [{
$cond: {
if: {
$gte: [
"$date", endDate
]
},
then: "$energy.Energy",
else: 0
}
}
]
}
}
}
}
}
])
Would be this:会是这样:
db.collection.aggregate([
{ $match: { date: { $gte: ISODate("2016-12-12") } } },
{
$group: {
_id: "$meter_id",
total: { $sum: 1 },
totalEnergy: { $sum: "$energy.Energy" }
}
}
])
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