Elasticsearch：Span_near和子串匹配

Question

我是弹性搜索的新手。 我想实现span附近的功能，在精确的短语匹配和精确的单词序列匹配之后也会处理子串匹配。

例如：

我在索引上的文件：

1. 男士奶油
2. 男士抗皱霜
3. 男士高级抗皱霜
4. 女士奶油
5. 女性抗皱霜
6. 女性高级抗皱霜

如果我搜索“男士奶油”，我希望结果与上面显示的顺序相同。 预期搜索结果：

1. 男士奶油 - ＆gt;确切的短语匹配
2. 男士抗皱霜 - ＆gt;使用slop 1
搜索字词序列
3. 男士高级皱纹霜 - ＆gt;使用slop 2
搜索字词序列
4. 女士奶油 - ＆gt;子串接近精确短语匹配
5. 女士抗皱霜 - ＆gt;带有slop 1
的子字符串搜索词序列
6. 女性高级皱纹霜 - ＆gt;带有slop 2
的子字符串搜索词序列

我可以通过span_near嵌套span_terms slop = 2和in_order = true来获得前3个结果。
我无法实现剩余的4到6，因为span_near有嵌套的span_terms不支持wildcard，在这个例子中“男人的奶油”或“男人的< / em> cream “。 我有什么方法可以使用ELASTICSEARCH来实现它吗？

更新
我的索引：

{
  "bluray": {
    "settings": {
      "index": {
        "uuid": "4jofvNfuQdqbhfaF2ibyhQ",
        "number_of_replicas": "1",
        "number_of_shards": "5",
        "version": {
          "created": "1000199"
        }
      }
    }
  }
}

映射：

{
  "bluray": {
    "mappings": {
      "movies": {
        "properties": {
          "genre": {
            "type": "string"
          }
        }
      }
    }
  }
}

我正在运行以下查询：

POST /bluray/movies/_search
{
  "query": {
    "bool": {
      "should": [
        {
          "span_near": {
            "clauses": [
              {
                "span_term": {
                  "genre": "women"
                }
              },
              {
                "span_term": {
                  "genre": "cream"
                }
              }
            ],
            "collect_payloads": false,
            "slop": 12,
            "in_order": true
          }
        },
        {
          "custom_boost_factor": {
            "query": {
              "match_phrase": {
                "genre": "women cream"
              }
            },
            "boost_factor": 4.1
          }
        },
        {
          "match": {
            "genre": {
              "query": "women cream",
              "analyzer": "standard",
              "minimum_should_match": "99%"
            }
          }
        }
      ]
    }
  }
}

它给了我以下结果：

"took": 3,
   "timed_out": false,
   "_shards": {
      "total": 5,
      "successful": 5,
      "failed": 0
   },
   "hits": {
      "total": 6,
      "max_score": 0.011612939,
      "hits": [
         {
            "_index": "bluray",
            "_type": "movies",
            "_id": "u9aNkZAoR86uAiW9SX8szQ",
            "_score": 0.011612939,
            "_source": {
               "genre": "men's cream"
            }
         },
         {
            "_index": "bluray",
            "_type": "movies",
            "_id": "cpTyKrL6TWuJkXvliibVBQ",
            "_score": 0.009290351,
            "_source": {
               "genre": "men's wrinkle cream"
            }
         },
         {
            "_index": "bluray",
            "_type": "movies",
            "_id": "rn_SFvD4QBO6TJQJNuOh5A",
            "_score": 0.009290351,
            "_source": {
               "genre": "men's advanced wrinkle cream"
            }
         },
         {
            "_index": "bluray",
            "_type": "movies",
            "_id": "9a31_bRpR2WfWh_4fgsi_g",
            "_score": 0.004618556,
            "_source": {
               "genre": "women's cream"
            }
         },
         {
            "_index": "bluray",
            "_type": "movies",
            "_id": "q-DoBBl2RsON_qwLRSoh9Q",
            "_score": 0.0036948444,
            "_source": {
               "genre": "women's advanced wrinkle cream"
            }
         },
         {
            "_index": "bluray",
            "_type": "movies",
            "_id": "TxzCP8B_Q8epXtIcfgEw3Q",
            "_score": 0.0036948444,
            "_source": {
               "genre": "women's wrinkle cream"
            }
         }
      ]
   }
}

这根本不正确。当我搜索女性时，为什么要首先搜索男性。

注意：搜索“男士奶油”仍然会返回更好的效果，但不会遵循搜索词序列。

Answer 1

POST /bluray/movies/_search
{
  "query": {
    "bool": {
      "should": [
        {
          "span_near": {
            "clauses": [
              {
                "span_term": {
                  "genre": "women's"
                }
              },
              {
                "span_term": {
                  "genre": "cream"
                }
              }
            ],
            "collect_payloads": false,
            "slop": 12,
            "in_order": true
          }
        },{
          "match": {
            "genre": {
              "query": "women's cream",
              "analyzer": "standard",
              "minimum_should_match": "99%"
            }
          }
        }
      ]
    }
  }
}

根据您的预期提供以下输出：

    {
  "took": 2,
  "timed_out": false,
  "_shards": {
    "total": 5,
    "successful": 5,
    "failed": 0
  },
  "hits": {
    "total": 6,
    "max_score": 0.7841132,
    "hits": [
      {
        "_index": "bluray",
        "_type": "movies",
        "_id": "4",
        "_score": 0.7841132,
        "_source": {
          "genre": "women's cream"
        }
      },
      {
        "_index": "bluray",
        "_type": "movies",
        "_id": "5",
        "_score": 0.56961054,
        "_source": {
          "genre": "women's wrinkle cream"
        }
      },
      {
        "_index": "bluray",
        "_type": "movies",
        "_id": "6",
        "_score": 0.35892165,
        "_source": {
          "genre": "women's advanced wrinkle cream"
        }
      },
      {
        "_index": "bluray",
        "_type": "movies",
        "_id": "3",
        "_score": 0.2876821,
        "_source": {
          "genre": "men's advanced wrinkle cream"
        }
      },
      {
        "_index": "bluray",
        "_type": "movies",
        "_id": "1",
        "_score": 0.25811607,
        "_source": {
          "genre": "men's cream"
        }
      },
      {
        "_index": "bluray",
        "_type": "movies",
        "_id": "2",
        "_score": 0.11750762,
        "_source": {
          "genre": "men's wrinkle cream"
        }
      }
    ]
  }
}