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  1. Core Server
  2. SERVER-79282

Cannot group using searchMeta

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    • Resolution: Done
    • Priority: Icon: Major - P3 Major - P3
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    • Server Triage

      My documents are like this below:

       

      {
          "_id": ObjectId("63bd85a644552d73f36c366e"),
          "ts": datetime.datetime(2023, 1, 10, 15, 35, 2, 374000),
          "dt": datetime.datetime(2023, 1, 10, 15, 34, 10),
          "aff": 2,
          "src": 2,
          "st": 2
      }

       

      I have more than 50M documents, and $searchMeta saved my life with its faceting speed! But, it's not complete. Please help me to achieve it.

      I wanna count documents based on aff and src grouping. And ts and st as filters. And getting the maximum date for every group.

      I developed this aggregation pipeline below:

       

      [
          {
              "$searchMeta": {
                  "index": "MsgAtlasIndex",
                  "count": {"type": "total"},
                  "facet": {
                      "operator": {
                          "compound": {
                              "must": [
                                  {
                                      "range": {
                                          "path": "ts",
                                          "gte": datetime.now() - timedelta(hours=24)
                                      }
                                  },
                                  {"equals": {"path": "st", "value": 2}},
                              ]
                          }
                      },
                      "facets": {
                          "src": {
                              "type": "number",
                              "path": "src",
                              "boundaries": [1, 2, 3, 4, 5, 6, 7, 10, 11]
                          },
                          "aff": {
                              "type": "number",
                              "path": "aff",
                              "boundaries": [1,2,3,4,5,7,8,9,10,11,12,14,17,18,19,20,21]
                          },
                      },
                  },
              }
          },
      ]

       

      The output of this is like below:

      [
          {
              "count": {"total": 35},
              "facet": {
                  "aff": {
                      "buckets": [
                          {"_id": 1, "count": 1},
                          {"_id": 2, "count": 34},
                          {"_id": 3, "count": 0},
                          {"_id": 4, "count": 0},
                          {"_id": 5, "count": 0},
                          {"_id": 7, "count": 0},
                          {"_id": 8, "count": 0},
                          {"_id": 9, "count": 0},
                          {"_id": 10, "count": 0},
                          {"_id": 11, "count": 0},
                          {"_id": 12, "count": 0},
                          {"_id": 14, "count": 0},
                          {"_id": 17, "count": 0},
                          {"_id": 18, "count": 0},
                          {"_id": 19, "count": 0},
                          {"_id": 20, "count": 0},
                      ]
                  },
                  "src": {
                      "buckets": [
                          {"_id": 1, "count": 0},
                          {"_id": 2, "count": 34},
                          {"_id": 3, "count": 0},
                          {"_id": 4, "count": 0},
                          {"_id": 5, "count": 0},
                          {"_id": 6, "count": 0},
                          {"_id": 7, "count": 1},
                          {"_id": 10, "count": 0},
                      ]
                  },
              },
          }
      ]

      I don't want aff and src separated. I want them to be grouped.

      Wanted result:

      [
          {
              "_id": {"aff": 1, "src": 7},
              "count": 1,
              "last_message_datetime": datetime.datetime(2023, 7, 24, 13, 8, 3, 488000),
          },
          {
              "_id": {"aff": 2, "src": 2},
              "count": 34,
              "last_message_datetime": datetime.datetime(2023, 7, 24, 22, 25, 23),
          },
      ]

      Please help me!

            Assignee:
            noopur.gupta@mongodb.com Noopur Gupta
            Reporter:
            ahmed.fager@gmail.com ahmad al sharbaji
            Votes:
            0 Vote for this issue
            Watchers:
            3 Start watching this issue

              Created:
              Updated:
              Resolved: