當鍵未知（變量）時，如何從 mongodb 中的嵌套 json 中獲取數據

Question

我如何獲取已實現目標的用戶列表，即目標。goalid.isComplete == true。這里的目標 ID 是一個變量，未知。 使用 express 獲取 nodejs 的 [goalid, points].Mongodb 查詢等詳細信息。

這適用於 mongo shell 但不適用於 express 並且我無法獲取所需的屬性（目標，點）

db.tablename.find({$where: function() {for(var key in this.goals) {if (this.goals[key].isComplete == true) return true; }return false; }});

下面是表格數據（單行）

 {
        "_id": ObjectId("60fe7d8d48406eb3c8f6c3e5"),
        "entityId": "abc",
        "goals": {
            "60fe7a9c793a7a7bb141715f": {
                "isComplete": true,
                "criteriaIds": {
                    "60fe7a9c793a7a7bb1417160": {
                        "isComplete": true,
                        "value": 5,
                        "completionDate": 1627361639350
                    }
                },
                "pointsAwarded": 100,
                "completionDate": 1627361639350
            },
            "60fe7aaa793a7a7bb1417169": {
                "isComplete": true,
                "criteriaIds": {
                    "60fe7aaa793a7a7bb141716a": {
                        "isComplete": true,
                        "value": 101,
                        "completionDate": 1627361527428
                    }
                },
                "pointsAwarded": 50,
                "completionDate": 1627361527428
            },
            "60ff907855b1412e4f087b64": {
                "isComplete": true,
                "criteriaIds": {
                    "60ff907955b1412e4f087b65": {
                        "isComplete": true,
                        "value": 101,
                        "completionDate": 1627361527428
                    }
                },
                "pointsAwarded": 50,
                "completionDate": 1627361527429
            }
        },
        "points": 200
    }

Answer 1

嘗試使用這個

db.collection.aggregate([
  {
    $project: {
      _id: 0,
      goals: {
        $objectToArray: "$goals"
      }
    }
  },
  {
    $unwind: "$goals"
  },
  {
    $match: {
      "goals.v.isComplete": true
    }
  },
  {
    $project: {
      goalid: "$goals.k",
      points: "$goals.v.pointsAwarded",
      
    },
    
  }
])

輸出將是

[
  {
    "goalid": "60ff907855b1412e4f087b64",
    "points": 50
  },
  {
    "goalid": "60fe7a9c793a7a7bb141715f",
    "points": 100
  },
  {
    "goalid": "60fe7aaa793a7a7bb1417169",
    "points": 50
  }
]

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