如何编写匹配然后过滤记录的弹性搜索查询？

Question

在 Elastic Search 中，我编写了一个匹配搜索词并获取结果的查询。这是我使用的查询。

  {
    "size": 40,
    "query": {
      "bool": {
        "must": [
          {
            "match": {
              "name": {
                "query": "Salem Chennai",
                "fuzziness": 1,
                "prefix_length": 2,
                "operator": "or"
              }
            }
          }
        ]
      }
    }
  }

这是我得到的回复：

    "timed_out": false,
    "_shards": {
      "total": 5,
      "successful": 5,
      "skipped": 0,
      "failed": 0
    },
    "hits": {
      "total": 2,
      "max_score": 11.182817,
      "hits": [
        {
          "_index": "locations",
          "_type": "city",
          "_id": "1610",
          "_score": 11.182817,
          "_source": {
            "name": "Chennai",
            "code": "IN-TN-CENAI",
            "province_name": "Tamil Nadu",
            "province_code": "IN-TN",
            "country_name": "India",
            "country_code": "IN"
          }
        },
        {
          "_index": "locations",
          "_type": "city",
          "_id": "24216",
          "_score": 9.688159,
          "_source": {
            "name": "Salem",
            "code": "US-IN-SALEM",
            "province_name": "Indiana",
            "province_code": "US-IN",
            "country_name": "United States",
            "country_code": "US"
          }
        }
    ]
  }

现在我想过滤 country_code 上的回复。

所以我尝试了这个查询

{
    "size": 40,
    "query": {
      "bool": {
        "must": [
          {
            "match": {
              "name": {
                "query": "Salem Chennai",
                "fuzziness": 1,
                "prefix_length": 2,
                "operator": "or"
              }
            }
          }
        ],
        "filter": [
          {
            "term": {
              "country_name": "India"
            }
          }
        ]
      }
    }
  }

这是索引映射：

{
  "locations" : {
    "mappings" : {
      "city" : {
        "properties" : {
          "code" : {
            "type" : "text",
            "fields" : {
              "keyword" : {
                "type" : "keyword",
                "ignore_above" : 256
              }
            }
          },
          "country_code" : {
            "type" : "text",
            "fields" : {
              "keyword" : {
                "type" : "keyword",
                "ignore_above" : 256
              }
            }
          },
          "country_id" : {
            "type" : "text",
            "fields" : {
              "keyword" : {
                "type" : "keyword",
                "ignore_above" : 256
              }
            }
          },
          "country_name" : {
            "type" : "text",
            "fields" : {
              "keyword" : {
                "type" : "keyword",
                "ignore_above" : 256
              }
            }
          },
          "id" : {
            "type" : "text",
            "fields" : {
              "keyword" : {
                "type" : "keyword",
                "ignore_above" : 256
              }
            }
          },
          "name" : {
            "type" : "text",
            "fields" : {
              "keyword" : {
                "type" : "keyword",
                "ignore_above" : 256
              }
            }
          },
          "province_code" : {
            "type" : "text",
            "fields" : {
              "keyword" : {
                "type" : "keyword",
                "ignore_above" : 256
              }
            }
          },
          "province_country_code" : {
            "type" : "text",
            "fields" : {
              "keyword" : {
                "type" : "keyword",
                "ignore_above" : 256
              }
            }
          },
          "province_country_id" : {
            "type" : "text",
            "fields" : {
              "keyword" : {
                "type" : "keyword",
                "ignore_above" : 256
              }
            }
          },
          "province_country_name" : {
            "type" : "text",
            "fields" : {
              "keyword" : {
                "type" : "keyword",
                "ignore_above" : 256
              }
            }
          },
          "province_id" : {
            "type" : "text",
            "fields" : {
              "keyword" : {
                "type" : "keyword",
                "ignore_above" : 256
              }
            }
          },
          "province_name" : {
            "type" : "text",
            "fields" : {
              "keyword" : {
                "type" : "keyword",
                "ignore_above" : 256
              }
            }
          }
        }
      }
    }
  }
}

我应该得到一个结果，但是，这个查询没有给我任何结果。有人可以帮我写一个合适的查询来匹配然后从弹性搜索中过滤记录吗？

我以此为参考： https://www.elastic.co/guide/en/elasticsearch/reference/current/query-filter-context.html#query-filter-context-ex

Answer 1

您应该使用关键字进行过滤，如下所示：

{
    "size": 40,
    "query": {
      "bool": {
        "must": [
          {
            "match": {
              "name": {
                "query": "Salem Chennai",
                "fuzziness": 1,
                "prefix_length": 2,
                "operator": "or"
              }
            }
          }
        ],
        "filter": [
          {
            "term": {
              "country_name.keyword": "India"
            }
          }
        ]
      }
    }
  }

字段 country_name（没有 .keyword）在索引时被分析（规范化），因此根据您的分析器，它已被转换为其他内容（例如小写，可能是词干，...） .

如何编写匹配然后过滤记录的弹性搜索查询？

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