mongodb文檔的復雜查詢:查詢meta字段timestampoccur
問題:
給定一個包含如下結構數據的mongodb文檔:
{ // ... 省略其他字段 "meta": { "aaa": { // 注意,這里的aaa,每條數據都不一樣,隨機的名稱 "timestampoccur": [ { "$date": "2023-06-19t10:18:02.000z" // 這個是 date 類型 } ] }, "bbb": { "timestampoccur": [ { "$date": "2023-06-19t02:59:05.000z" } ] } } }
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如何在mongodb中查詢以下內容:
- 查詢meta字段下各字段的timestampoccur
- 符合指定日期范圍內的記錄
解答:
以下mongodb聚合管道可滿足您的要求:
db.collection.aggregate([ { $match: { "meta.timestampOccur": { $elemMatch: { $gte: ISODate("2023-06-18T00:00:00.000Z"), $lt: ISODate("2023-06-20T00:00:00.000Z") } } } }, { $project: { _id: 1, campaign: 1, status: 1, workflow: 1, user: 1, basic: 1, type: 1, createdAt: 1, updatedAt: 1, tag: 1, code: 1, meta: { $objectToArray: "$meta" } } }, { $unwind: { path: "$meta", includeArrayIndex: "metaIndex" } }, { $match: { "meta.v.timestampOccur": { $elemMatch: { $gte: ISODate("2023-06-18T00:00:00.000Z"), $lt: ISODate("2023-06-20T00:00:00.000Z") } } } }, { $group: { _id: "$_id", campaign: { $first: "$campaign" }, status: { $first: "$status" }, workflow: { $first: "$workflow" }, user: { $first: "$user" }, basic: { $first: "$basic" }, type: { $first: "$type" }, createdAt: { $first: "$createdAt" }, updatedAt: { $first: "$updatedAt" }, tag: { $first: "$tag" }, code: { $first: "$code" }, meta: { $push: { k: "$meta.k", v: "$meta.v" } } } }, { $project: { _id: 1, campaign: 1, status: 1, workflow: 1, user: 1, basic: 1, type: 1, createdAt: 1, updatedAt: 1, tag: 1, code: 1, meta: { $arrayToObject: "$meta" } } } ])
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代碼注釋: