Question

我具有以下文档结构，并且我的汇总花了很长时间。以下是存储在Mongo中的JSON代码片段。

"project_id" : ObjectId("5c32fa9ffb6fc0600bda7b53"), "campaign_id" : ObjectId("5c5cecd860d3f82c64b1195a"), "respondent_id" : "5c5cecd860d3f82c64b1195b", "status" : "Complete", "demo1Key" : "gender", "demo1Value" : "2", // these values are till 10 "responses" : [ // this is a dynamic array with the below properties { "_id" : ObjectId("5c5cecd860d3f82c64b11a54"), "question" : "Question Text ", "answer" : [ // This can be an array or a single text value { "id" : 10001, "option" : "1", "answer" : "1" } ] }]

在我的nodejs应用程序中，我正在尝试汇总如下所述的结果。

var groupById = { "optionText": "$responses.answer.answer", "question": "$responses.question" };
// create the group by id based on the maximum possible demographics for a single question option.
for (var i = 0; i <=10; i++) {
  groupById[`demo${i}Key`] = `$demo${i}Key`
  groupById[`demo${i}Value`] = `$demo${i}Value`
}
const aggregatorOpts = [
  {
    $match: { 
      $and: [
        {
          "project_id": new mongoose.Types.ObjectId(projId)
        },
        { "status": "Complete" },
      ]
    }
  },
  {
    $unwind: "$responses"
  },
  {
    $unwind: "$responses.answer"
  },
  {
    $group: {
      _id: groupById,
      count: { $sum: 1 }
    }
  },
  ]

let dbData = await Respondent.aggregate(aggregatorOpts)

我尝试运行分析器，并在文档上添加了一些索引，即：resentent_id，project_id，campaign_id，状态

MongoDB聚合非常慢

0 个答案: