golang实现es根据某字段分组，统计每组某字段的数量，过滤空值并去重

需求：

索引：dna

需求：根据appId分组，统计每组的OwnerBid数量，过滤空值并去重

dna索引结构

type Dna struct {
    App struct {
        AcCode     string `json:"ac_code"`
        BifUserBid string `json:"bif_user_bid"`
        Id         string `json:"id"`
        Name       string `json:"name"`
        Type       int    `json:"type"`
        ChainName  string `json:"chainName"`
    } `json:"app"`
    BifUser struct {
        Dna721ContractAddress string `json:"dna721_contract_address"`
    } `json:"bif_user"`
    Category   string    `json:"category"`
    CreateTime time.Time `json:"create_time"`
    DisplayUrl string    `json:"display_url"`
    DnaPrice   string    `json:"dna_price"`
    Id         string    `json:"id"`
    Name       string    `json:"name"`
    Number     string    `json:"number"`
    OwnerBid   string    `json:"owner_bid"`
    Series     struct {
        Issuer string `json:"issuer"`
        Name   string `json:"name"`
    } `json:"series"`
    SeriesId string `json:"series_id"`
    Status   int    `json:"status"`
    TokenBid string `json:"token_bid"`
    Url      string `json:"url"`
}

es查询语句

{
  "aggregations": {
    "ownerCount": {
      "aggregations": {
        "countAgg": {
          "cardinality": {
            "field": "owner_bid"
          }
        }
      },
      "terms": {
        "field": "app.id",
        "size": 5
      }
    }
  },
  "query": {
    "bool": {
      "must_not": {
        "term": {
          "owner_bid": ""
        }
      },
      "should": {
        "terms": {
          "app.id": [
            "e05aca13-34f6-4f3e-88d3-76698cad76c9",
            "691f84ed-8ecc-40ab-8880-4674d93c85e4",
            "c0ffecef-dad8-481c-ae05-1a55e8724327",
            "e0ffbbba-b49e-4570-a4b1-1cb74e4ad2ba",
            "f48717b2-a0a3-41c2-a978-f54299a1e42d"
          ]
        }
      }
    }
  },
  "size": 0
}

es查询结果

{
  "took": 1,
  "timed_out": false,
  "_shards": {
    "total": 2,
    "successful": 2,
    "skipped": 0,
    "failed": 0
  },
  "hits": {
    "total": {
      "value": 2941,
      "relation": "eq"
    },
    "max_score": null,
    "hits": [ ]
  },
  "aggregations": {
    "ownerCount": {
      "doc_count_error_upper_bound": 0,
      "sum_other_doc_count": 0,
      "buckets": [
        {
          "key": "c0ffecef-dad8-481c-ae05-1a55e8724327",
          "doc_count": 2522,
          "countAgg": {
            "value": 2
          }
        }
        ,
        {
          "key": "e0ffbbba-b49e-4570-a4b1-1cb74e4ad2ba",
          "doc_count": 374,
          "countAgg": {
            "value": 1
          }
        }
        ,
        {
          "key": "f48717b2-a0a3-41c2-a978-f54299a1e42d",
          "doc_count": 45,
          "countAgg": {
            "value": 1
          }
        }
      ]
    }
  }
}

goalng实现

models.EsCountAgg

type EsCountAgg struct {
    DocCountErrorUpperBound int64 `json:"doc_count_error_upper_bound"`
    SumOtherDocCount        int64 `json:"sum_other_doc_count"`
    Buckets                 []struct {
        Key      string `json:"key"`
        DocCount int64  `json:"doc_count"`
        CountAgg struct {
            Value float64 `json:"value"`
        } `json:"countAgg"`
    } `json:"buckets"`
}
var appIds []interface{}
for _, app := range appResList {
    appIds = append(appIds, app.AppId)
}
appTermsQuery := elastic.NewTermsQuery("app.id", appIds...)
searchDna := l.svcCtx.OEsClient.OClient.Search().Index("dna")

// 持有者数量, owner_bid去重，过滤空值，按app.id分组
    searchDna = l.svcCtx.OEsClient.OClient.Search().Index("dna")
    ownerRes, err := searchDna.Query(elastic.NewBoolQuery().Should(appTermsQuery).MustNot(elastic.NewTermQuery("owner_bid", ""))).
        Aggregation("ownerCount", elastic.NewTermsAggregation().Field("app.id").Size(len(appIds)).
        SubAggregation("countAgg", elastic.NewCardinalityAggregation().Field("owner_bid"))).Size(0).Do(l.ctx)
    if err != nil {
        return nil, err
    }
    var ownerCounts models.EsCountAgg
    err = json.Unmarshal(ownerRes.Aggregations["ownerCount"], &ownerCounts)
    if err != nil {
        return nil, err
    }
    ownerCountM := make(map[string]int64, len(ownerCounts.Buckets))
    for _, ownerCount := range ownerCounts.Buckets {
        ownerCountM[ownerCount.Key] = int64(ownerCount.CountAgg.Value)
    }
    for i, app := range appResList {
        appResList[i].OwnerBidCounts = ownerCountM[app.AppId]
    }