Question

我正在尝试制作一个自动填充功能，可以为键入的单词位置提供更高的分数。按分数排序然后命名。

我的目标：

输入“pet”

结果：

peter christensen
peter christian grau
peter christian reumert krogsgaard
peter bruun christensen
anders petersen

输入“peter chr”

结果：

peter christensen
peter christian grau
peter christian reumert krogsgaard
peter bruun christensen

上面的成功，我很高兴，但是当有重复的“peter christensen”时，发生了一些奇怪的事情。现在结果如下：

peter christian grau
peter christian reumert krogsgaard
peter christensen
peter christensen
peter bruun christensen

我想要这个：

peter christensen
peter christensen
peter christian grau
peter christian reumert krogsgaard
peter bruun christensen

请帮帮忙？

设置：

{
    "persons_index": {
        "settings": {
            "index": {
                "number_of_shards": "5",
                "provided_name": "persons_index",
                "creation_date": "1499881803116",
                "analysis": {
                    "filter": {
                        "ascii_folding_preserve_original": {
                            "type": "asciifolding",
                            "preserve_original": "true"
                        },
                        "names_synonym_filter": {
                            "type": "synonym",
                            "synonyms": [
                                "aage,åge",
                                "gaard,gård"
                            ]
                        }
                    },
                    "analyzer": {
                        "my_analyzer": {
                            "filter": [
                                "lowercase",
                                "trim",
                                "names_synonym_filter",
                                "ascii_folding_preserve_original"
                            ],
                            "type": "custom",
                            "tokenizer": "standard"
                        }
                    }
                },
                "number_of_replicas": "1",
                "uuid": "LxMHLha-R02i__S7gDWBtA",
                "version": {
                    "created": "5050099"
                }
            }
        }
    }
}

映射：

{
    "persons_index": {
        "mappings": {
            "persons_type": {
                "properties": {
                    "fieldDisplayFullName": {
                        "type": "text",
                        "norms": false,
                        "analyzer": "my_analyzer"
                    },
                    "fieldSort": {
                        "type": "text",
                        "norms": false,
                        "analyzer": "keyword",
                        "fielddata": true
                    }
                }
            }
        }
    }
}

示例文档

{"fieldSort" : "peter christensen", "fieldDisplayFullName" : "Peter Christensen"}

查询：

_search漂亮=真安培; SEARCH_TYPE = dfs_query_then_fetch

{
  "explain": false,
  "size" : 50,
  "sort": [
        "_score",
        {
            "fieldSort": {
                "order": "asc"
            }
        }
    ],
  "query": {
    "bool" : {
      "must" : {
        "bool" : {
              "minimum_should_match":"2",
              "should" : [
                {"match" : { "fieldDisplayFullName" : "peter" }},
                {"wildcard" : { "fieldDisplayFullName" : "chr*" }}
              ]
        }
      },
       "should" : [
          {"match_phrase_prefix" : { "fieldSort" : {"query" : "peter chr","boost" : 10}}}
        ]
    }
  }
}

结果：

Peter Christensen (_score: 18.968887)
Peter Christian Engelhardt (_score: 18.968887)
Peter Christian Grau (_score: 18.968887)
Peter Christian Reumert Krogsgaard (_score: 18.968887)
Peter Christian Vagnbo Jørgensen (_score: 18.968887)
Peter Christoffersen (_score: 18.968887)
Peter Bruun Christensen (_score: 1.0512933)
Peter Dits Christensen (_score: 1.0512933)
Peter Fjeldsø Christensen (_score: 1.0512933)

重复“Peter Christensen（_score：14.909464）”

Peter Christian Engelhardt (_score: 20.01772)
Peter Christian Grau (_score: 20.01772)
Peter Christian Reumert Krogsgaard (_score: 20.01772)
Peter Christian Vagnbo Jørgensen (_score: 20.01772)
Peter Christoffersen (_score: 20.01772)
Peter Christensen (_score: 14.909464)
Peter Christensen (_score: 14.909464)
Peter Bruun Christensen (_score: 1.04652)
Peter Dits Christensen (_score: 1.04652)
Peter Fjeldsø Christensen (_score: 1.04652)

不同的查询尝试没有成功：

{
  "explain": false,
  "size" : 50,
  "sort": [
        "_score",
        {
            "fieldSort": {
                "order": "asc"
            }
        }
    ],
  "query": {
    "bool" : {
      "must" : {
        "bool" : {
              "minimum_should_match":"2",
              "should" : [
                {"match" : { "fieldDisplayFullName" : "peter" }},
                {"wildcard" : { "fieldDisplayFullName" : "chr*" }}
              ]
        }
      },
       "should" : [
            {"span_first" : {
              "match" : {
                  "span_term" : { "fieldDisplayFullName" : "peter" }
              },
              "end" : 1,
              "boost" : 50.0
            }},
            {"span_first" : {
              "match" : {
                  "span_multi":{
                    "match":{
                        "wildcard" : { "fieldDisplayFullName" : "chr*" }
                    }
                  }
              },
              "end" : 2,
              "boost" : 50.0
            }}
        ]
    }
  }
}

Answer 1

解决了“constant_score”

{
  "explain": false,
  "size" : 50,
  "sort": [
        "_score",
        {
            "fieldSort": {
                "order": "asc"
            }
        }
    ],
  "query": {
    "bool" : {
      "must" : {
        "bool" : {
              "minimum_should_match":"2",
              "should" : [
                {"match" : { "fieldDisplayFullName" : "peter" }},
                {"wildcard" : { "fieldDisplayFullName" : "chr*" }}
              ]
        }
      },
       "should" : [
            { "constant_score": {
                "boost":   2,
                "query": {"match_phrase_prefix" : { "fieldSort" : {"query" : "peter chr"}}}
            }}
        ]
    }
  }
}

Answer 2

详细了解Elasticsearch computes relevance scores如何IDF（逆文档频率）。

因此，您可以尝试多个approaches来忽略IDF来解决此问题。我有一个类似的问题，我通过将已应用的search type更改为dfs_query_then_fetch来解决问题。

您的配置是否超过1 shard？

干杯，多米尼克

Elasticsearch 5.5：需要帮助进行名称搜索（职位得分更高）

2 个答案: