【发布时间】：2020-08-02 18:42:26
【问题描述】：
我需要使用 mongoose 聚合框架从我的架构中获取此输出
我的架构
const innerSchema = mongoose.Schema({
responseTime: Number,
day: String,
hour: Number
})
let logsSchema = mongoose.Schema({
name: { type: String, enum: ['visit', 'new-request', 'new-customer'] },
series: { type: [innerSchema], default: [] }
})
我需要的输出如下
[{
"name":"visit",
"series": [
{
"day": "Saturday",
"count": 50
},
{
"day": "Friday",
"count": 20
}
]
},
{
"name":"new-request",
"series": [
{
"day": "Saturday",
"count": 100
},
{
"day": "Friday",
"count": 4
}
]
}]
目前卡在这个聚合查询中
Logs.aggregate([
{
$group: {
'_id': '$name',
series: { $first: '$series' }
}
},
{ $unwind: '$series' },
{
"$group": {
"_id": '$series.day',
count: { $sum: 1 }
}
},
{ $limit: 7 }
])
输出以下内容：
[
{
"_id": "Saterday",
"count": 1
},
{
"_id": "Friday",
"count": 1
},
{
"_id": "Sunday",
"count": 5
}
]
它错过了名称和系列字段
我需要将系列数组限制为前 7 个文档才能获得一周的数据
感谢任何帮助
新 ---> 更新
这是原始数据集
将其更新为简单的结构
[
{
"_id": "5ea1770c165ece5a40af06ea",
"name": "new-request",
"day": "Saturday",
"hour": 14,
"createdAt": "2020-04-23T11:07:56.175Z",
"updatedAt": "2020-04-23T11:07:56.175Z",
"__v": 0
},
{
"_id": "5ea17770165ece5a40af06eb",
"name": "new-request",
"day": "Thursday",
"hour": 14,
"createdAt": "2020-04-23T11:09:36.364Z",
"updatedAt": "2020-04-23T11:09:36.364Z",
"__v": 0
},
{
"_id": "5ea17770165ece5a40af06ec",
"name": "new-customer",
"day": "Thursday",
"hour": 14,
"createdAt": "2020-04-23T11:09:36.984Z",
"updatedAt": "2020-04-23T11:09:36.984Z",
"__v": 0
},
{
"_id": "5ea17771165ece5a40af06ed",
"name": "visit",
"day": "Thursday",
"hour": 14,
"createdAt": "2020-04-23T11:09:37.603Z",
"updatedAt": "2020-04-23T11:09:37.603Z",
"__v": 0
},
{
"_id": "5ea17772165ece5a40af06ee",
"name": "visit",
"day": "Thursday",
"hour": 14,
"createdAt": "2020-04-23T11:09:38.207Z",
"updatedAt": "2020-04-23T11:09:38.207Z",
"__v": 0
},
{
"_id": "5ea17772165ece5a40af06ef",
"name": "visit",
"day": "Saturday",
"hour": 14,
"createdAt": "2020-04-23T11:09:38.698Z",
"updatedAt": "2020-04-23T11:09:38.698Z",
"__v": 0
},
{
"_id": "5ea17773165ece5a40af06f0",
"name": "visit",
"day": "Thursday",
"hour": 14,
"createdAt": "2020-04-23T11:09:39.247Z",
"updatedAt": "2020-04-23T11:09:39.247Z",
"__v": 0
},
{
"_id": "5ea2dd44030d853950379007",
"name": "visit",
"day": "Friday",
"hour": 15,
"createdAt": "2020-04-24T12:36:20.867Z",
"updatedAt": "2020-04-24T12:36:20.867Z",
"__v": 0
},
{
"_id": "5ea2dd56030d853950379008",
"name": "visit",
"day": "Friday",
"hour": 15,
"createdAt": "2020-04-24T12:36:38.297Z",
"updatedAt": "2020-04-24T12:36:38.297Z",
"__v": 0
},
{
"_id": "5ea2dd58030d853950379009",
"name": "visit",
"day": "Friday",
"hour": 15,
"createdAt": "2020-04-17T00:36:40.583Z",
"updatedAt": "2020-04-24T12:36:40.583Z",
"__v": 0
},
{
"_id": "5ea2dd58030d85395037900a",
"name": "visit",
"day": "Friday",
"hour": 15,
"createdAt": "2020-04-24T12:36:40.878Z",
"updatedAt": "2020-04-24T12:36:40.878Z",
"__v": 0
}
]
在@AlexZeDim 和一些调整的帮助下，我设法让它工作，但我遇到了数据排序的最后一个问题 我需要按 createdAt
对数据进行排序Logs.aggregate([
{
$group: {
_id: '$name',
series: { "$push": "$$ROOT" }
}
},
{
$unwind: "$series"
},
{
$addFields: {
createdAt: '$series.createdAt'
}
},
{ $match: { createdAt: { $gt: lastWeekDate, $lt: date } } },
{
$group: {
_id: {
name: "$_id",
day: "$series.day"
},
count: {
$sum: 1
}
}
},
{
$group: {
_id: "$_id.name",
series: {
$addToSet: {
name: "$_id.day",
value: {
$sum: "$count"
}
}
},
}
},
{
$addFields: {
createdAt: '$createdAt'
}
},
{
$project: {
_id: 0,
name: "$_id",
series: "$series"
}
}
])
问题已解决
【问题讨论】：
-
请提供集合中的原始示例/数据集
-
另外，我不确定
.limit部分。如果您的series.day字段具有当前 DayOfTheWeek 的值，那么简单的小组阶段将为您提供所需的一切，因为一周中有 7 个不同的日子。当您limit(7)时，您只显示最后 7 个值，而不是一周中的 7 个不同的日子。 -
您可以尝试在 first
$group阶段使用$push运算符而不是$first。第一阶段小组赛结束后查看结果。 -
受限于我需要过去 7 天的数据而不是所有天的数据，我还添加了原始数据集，感谢@AlexZeDim 的回复
-
将 $first 更改为 $push 没有帮助 @prasad_
标签： node.js mongodb mongoose aggregation-framework