elasticsearch - 聚合(一个字段中的许多值)elasticsearch

Question

我在一个字段中有很多值，当我进行汇总时，我将这些值作为单独的值接收。
示例:

name : jess , Region : new york 
name : jess , Region : poland

请求:

  query = {
        "size": total,
        "aggs": {
        "buckets_for_name": {
            "terms": {
                 "field": "name",
                 "size": total
             },
            "aggs": {
                "region_terms": {
                    "terms": {
                        "field": "region",
                        "size": total
                    }
                }
            }
        }
        }
    }

与 response["aggregations"]["buckets_for_name"]["buckets"] 我得到:

 {'key': 'jess ', 'doc_count': 61, 'region_terms': {'doc_count_error_upper_bound': 0, 'sum_other_doc_count': 0, 'buckets': [{'key': 'oran', 'doc_count': 60}, {'key': 'new ', 'doc_count': 1}, {'key': 'york', 'doc_count': 1}]}}, {'key': 'jess ', 'doc_count': 50, 'egion_terms': {'doc_count_error_upper_bound': 0, 'sum_other_doc_count': 0, 'buckets': [{'key': 'poland', 'doc_count': 50}]}}

和

pretty_results = []
for result in response["aggregations"]["buckets_for_name"]["buckets"]:
    d = dict()
    d["name"] = result["key"]
    d["region"] = []
    for region in result["region_terms"]["buckets"]:
        d["region "].append(region ["key"])
        pretty_results.append(d)
        print(d)

我得到:

{'name': 'jess ', 'region ': ['new' , 'york', 'poland']}

我想得到以下结果:

{'name': 'jess ', 'region ': ['new york', 'poland']}

Answer 1

使用标准分析器分析了region(我假设为name)字段，该分析器将new york分解为 token [new和york]。
您可能想做的是设置一个keyword映射，将字符串视为独立 token :

PUT regions
{
  "mappings": {
    "properties": {
      "name": {
        "type": "text",
        "fielddata": true,
        "fields": {
          "keyword": {
            "type": "keyword"
          }
        }
      },
      "region": {
        "type": "text",
        "fielddata": true,
        "fields": {
          "keyword": {
            "type": "keyword"
          }
        }
      }
    }
  }
}

之后，在 .keyword字段上执行aggs:

{
  "size": 200,
  "aggs": {
    "buckets_for_name": {
      "terms": {
        "field": "name.keyword",         <---
        "size": 200
      },
      "aggs": {
        "region_terms": {
          "terms": {
            "field": "region.keyword",   <---
            "size": 200
          }
        }
      }
    }
  }
}

如果要保持 newyork的空间较小，请查看分析仪中的 pattern_replace 过滤器。

从评论中编辑
Aggs不是查询的一部分-它们有自己的作用域-因此请更改此设置

{
  "query": {
    "aggs": {
      "buckets_for_name": {

对此

{
  "query": {
     // possibly leave the whole query attribute out
   },
   "aggs": {
      "buckets_for_name": {
   ...