我正在尝试在Mongoose中按时间范围显示聚合数据。我的数据就像：
{company: "1" createdTime:"2017-01-01"}
{company: "1" createdTime:"2017-01-01"}
{company: "1" createdTime:"2017-01-02"}
{company: "2" createdTime:"2017-01-02"}
{company: "2" createdTime:"2017-01-03"}
{company: "3" createdTime:"2017-01-03"}
{company: "3" createdTime:"2017-01-03"}
我创建了一个类似的查询：
{
"aggregate": [{
"$project": {
"frequency": {
"$dateToString": {
"format": "%Y-%m-%d",
"date": "$createdTime"
}
}
}
}, {
"$group": {
"_id": {
"date": "$frequency"
},
"count": {
"$sum": 1
}
}
}
]
}
并返回：
[
{
"_id": {
"date": "2017-01-01"
},
"count": 2
},
{
"_id": {
"date": "2017-01-02"
},
"count": 2
},
{
"_id": {
"date": "2017-01-03"
},
"count": 3
}
]
这给了我对该特定日期总体事件的计数，这很好。
我想进一步打破这一点，以便给出每个公司在该日期出现的总和，它应该是这样的：
[
{
"_id": {
"date": "2017-01-01",
"companies": [{
"company": 1,
"count": 2
}]
},
"count": 2
},
{
"_id": {
"date": "2017-01-02",
"companies": [{
"company": 1,
"count": 1
},{
"company": 2,
"count": 1
}]
},
"count": 2
},
{
"_id": {
"date": "2017-01-03",
,
"companies": [{
"company": 2,
"count": 1
},{
"company": 3,
"count": 2
}]]
},
"count": 3
}
]
我尝试过所有类型的组合，但是当我放入第二组时我总是会遇到错误，我无法知道如何做到这一点？
修改
我无法使用评论中的示例，或者它们不能用于我的用例，但是，结合这些信息，我提出了这个：
{
"aggregate": [{
"$group": {
"_id": {
"company": "$company",
"date": {
"$dayOfMonth": "$createdTime"
},
"month": {
"$month": "$createdTime"
},
"year": {
"$year": "$createdTime"
}
},
"count": {
"$sum": 1
}
}
}, {
"$group": {
"_id": "$_id.company",
"events": {
"$push": {
"date": "$_id.date",
"month": "$_id.month",
"year": "$_id.year",
"count": "$count"
}
},
"totalEvents": {
"$sum": "$count"
}
}
}
]
}
会产生一些结果，如：
[
{
"_id": "1",
"dateCount": [
{
"date": 3,
"month": 12,
"year": 2017,
"count": 40
},
{
"date": 10,
"month": 12,
"year": 2017,
"count": 8
}
]
}
]
理想情况下，日期将是yyyy-mm-dd，但在查询中使用完整日期将包括时间也会导致每次不是日期的条目。我想现在这样做，我可以轻松地创建一个日期，虽然它有点麻烦，但它会做到更好的事情。
编辑2
[{
"_id": ObjectId("5a38a03b33ccd28fb87f6dc9"),
"createdBy": ObjectId("5a2e203fa567425b2cb411fc"),
"appId": ObjectId("5a2e203fa567425b2cb411fb"),
"eventName": "event",
"userName": "person",
"userEmail": "company__29",
"organisation": "company",
"module": "module",
"createdTime": ISODate("2017-12-02T17:07:25.000Z")
"__v": 0
}
]
查询：
{
"aggregate": [{
"$project": {
"frequency": {
"$dateToString": {
"format": "%U",
"date": "$createdTime"
}
}
}
}, {
"$group": {
"_id": {
"frequency": "$frequency",
"organisation": "$organisation"
},
"count": {
"$sum": 1
}
}
}, {
"$group": {
"_id": {
"date": "$_id.frequency"
},
"count": {
"$sum": 1
},
"companies": {
"$push": {
"organisation": "$organisation",
"count": "$count"
}
}
}
}
]
}