短语建议器 Elasticsearch 不纠正两个词

Question

我有以下映射到我的短语建议者：

{
   "settings": {
      "analysis": {
         "analyzer": {
            "suggests_analyzer": {
               "tokenizer": "standard",
               "filter": [
                  "lowercase",
                  "asciifolding",
                  "shingle_filter"
               ],
               "type": "custom"
            }
         },
         "filter": {
            "shingle_filter": {
               "min_shingle_size": 2,
               "max_shingle_size": 6,
               "type": "shingle"
            }
         }
      }
   },
   "mappings": {
      "sample_data": {
         "properties": {
            "name": {
               "type": "string",
               "analyzer": "suggests_analyzer"
            }
         }
      }
   }
}

我的索引中包含 "lung cancer"、"colorectal cancer"、"breast cancer"。但是，当我查询一个拼写错误的查询时，当我使用整理功能时，两个词都被拼错，如 "lhng cancar" returns 结果为零。我的示例查询如下。

{
   "suggest": {
      "text": "lhng cancar",
      "simple_phrase": {
         "phrase": {
            "field": "name",
            "size": 5,
            "real_word_error_likelihood": 0.95,
            "max_errors": 0.5,
            "direct_generator": [
               {
                  "field": "name",
                  "suggest_mode": "always",
                  "size": 5

               }
            ],
            "collate": {
               "query": {
                  "inline": {
                     "match_phrase": {
                        "{{field_name}}": "{{suggestion}}"
                     }
                  }
               },
               "params": {
                  "field_name": "name"
               },
               "prune": false
            }
         }
      }
   },
   "size": 0
}

上述查询的响应是：

{
   "took": 17,
   "timed_out": false,
   "_shards": {
      "total": 5,
      "successful": 5,
      "failed": 0
   },
   "hits": {
      "total": 1868381,
      "max_score": 0,
      "hits": []
   },
   "suggest": {
      "simple_phrase": [
         {
            "text": "lhng cancar",
            "offset": 0,
            "length": 11,
            "options": []
         }
      ]
   }
}

需要在查询中进行哪些更改才能获得建议中 "lung cancer" 的预期结果？

Answer 1

您必须将 max_errors 提高到 0.8 或更多。

这里给出了相同的答案

Answer 2

提高 max_errors: 2 的参数解决了我的问题。

短语建议器 Elasticsearch 不纠正两个词

Phrase suggester Elasticsearch not correcting two words

elasticsearch

elasticsearch-5