elasticsearch - 多字同义词和短语查询

Question

Elastic文档中有错误吗？

给定以下索引映射:

PUT /my_index
{
  "settings": {
    "analysis": {
      "filter": {
        "my_synonym_filter": {
          "type": "synonym",
          "synonyms": [
            "usa,united states,u s a,united states of america"
          ]
        }
      },
      "analyzer": {
        "my_synonyms": {
          "tokenizer": "standard",
          "filter": [
            "lowercase",
            "my_synonym_filter"
          ]
        }
      }
    }
  }
}

鉴于此文件:

put /my_index/country/1
{
  "title" : "The United States is wealthy"
}

在文档中指出:

这些词组不匹配:

美国很富有

美国富裕

美国很富有

但是，这些短语将:

美国富裕

美国富国

美国的富人

美国是美国

但是，似乎并非如此-应该匹配的短语根本不匹配!这是我正在运行的查询(根据documentation在查询时没有同义词扩展):

GET /my_index/country/_search
{

    "query" : {
        "match_phrase" : {
            "title" : {
               "query" : "United States is wealthy",
               "analyzer": "standard"
            }

        }
    }
}

我在这里想念什么？

Answer 1

文档中的示例对我有用。

您可能忘记了为映射中的title字段设置分析器。

例:

1)创建索引

PUT /my_index
{
  "settings": {
    "analysis": {
      "filter": {
        "my_synonym_filter": {
          "type": "synonym",
          "synonyms": [
            "usa,united states,u s a,united states of america"
          ]
        }
      },
      "analyzer": {
        "my_synonyms": {
          "tokenizer": "standard",
          "filter": [
            "lowercase",
            "my_synonym_filter"
          ]
        }
      }
    }
  }
}

2)添加映射

PUT my_index/country/_mapping
{
    "properties" : {
        "title" : {"type" : "string","analyzer" : "my_synonyms"}
    }
}

3)索引文件

PUT /my_index/country/1
{
  "title" : "The United States is wealthy"
}

4)查询

GET /my_index/country/_search
{

    "query" : {
        "match_phrase" : {
            "title" : {
               "query" : "United States is wealthy",
               "analyzer": "standard"
            }

        }
    }
}

5)回应:

{
   "took": 8,
   "timed_out": false,
   "_shards": {
      "total": 5,
      "successful": 5,
      "failed": 0
   },
   "hits": {
      "total": 1,
      "max_score": 0.75942194,
      "hits": [
         {
            "_index": "my_index",
            "_type": "country",
            "_id": "1",
            "_score": 0.75942194,
            "_source": {
               "title": "The United States is wealthy"
            }
         }
      ]
   }
}