问Elasticsearch -模糊搜索没有给出建议
EN

Stack Overflow用户

提问于 2020-03-05 22:15:08

回答 2查看 823关注 0票数 2

我试图通过NodeJS在Elasticsearch中实现一个模糊/自动完成搜索。我已经按索引"artist"索引了数据。下面是ES中存储的数据的示例。

{
  "hits": [{
    "_index": "artist",
    "_type": "_doc",
    "_id": "EyejqnAB2pHGVJHwV53Q",
    "_score": 1,
    "_source": {
      "kind": "song",
      "artistId": 111051,
      "artistName": "Eminem",
      "trackName": "Crack a Bottle (feat. Dr. Dre & 50 Cent)",
      "collectionName": "Relapse (Deluxe Version)",
      "collectionCensoredName": "Relapse (Deluxe Version)",
      "artistViewUrl": "https://music.apple.com/us/artist/eminem/111051?uo=4",
      "collectionViewUrl": "https://music.apple.com/us/album/crack-a-bottle-feat-dr-dre-50-cent-feat-dr-dre-50-cent/1440558626?i=1440558826&uo=4",
      "trackViewUrl": "https://music.apple.com/us/album/crack-a-bottle-feat-dr-dre-50-cent-feat-dr-dre-50-cent/1440558626?i=1440558826&uo=4",
      "previewUrl": "https://audio-ssl.itunes.apple.com/itunes-assets/AudioPreview128/v4/da/a5/c1/daa5c140-2c3d-1f74-40c3-b6e596e52b82/mzaf_7480202713407880256.plus.aac.p.m4a",
      "artworkUrl100": "https://is1-ssl.mzstatic.com/image/thumb/Music128/v4/c5/f8/fd/c5f8fdf6-d4c9-85c9-d169-c5d349a44f1c/source/100x100bb.jpg",
      "collectionPrice": 12.99,
      "releaseDate": "2009-02-02T12:00:00Z",
      "collectionExplicitness": "explicit",
      "trackExplicitness": "explicit",
      "discCount": 1,
      "discNumber": 1,
      "trackCount": 24,
      "trackNumber": 18,
      "country": "USA",
      "currency": "USD"
    }
  }]
}

上面的artistName和Eminem一样有价值，问题是当我输入'e'时，它没有显示任何东西，在'em'、emi、emin上也是如此。当我输入emine时，它就开始给出结果。我哪里出问题了？

node.js

typescript

elasticsearch

elasticsearch-5

javascript

回答 2

Stack Overflow用户

回答已采纳

发布于 2020-03-06 00:03:48

实现自动完成功能的方法有多种，模糊搜索是不正确的(它主要用于搜索相关文档w.r.t到令牌(Dupe)和拼写检查器中引用这，用于模糊搜索的应用)。

在您的情况下，如果索引大小不是很大，并且将最小字符长度限制为两个，那么我建议使用前缀查询 ，即不要搜索e，只有当用户键入两个或多个字符( em或emi、emin等)时才显示搜索结果。

工作实例

索引映射

{
    "mappings": {
        "properties": {
            "artistName": {
                "type": "text"
            }
        }
    }
}

索引文档

{
   "artistName" : "Eminem"
}

{
   "artistName" : "Emiten"
}

搜索查询

{
    "query": {
        "prefix": {
            "artistName": {
                "value": "em"
            }
        }
    }
}

搜索结果

{
            "_index": "so-60558525-auto",
            "_type": "_doc",
            "_id": "1",
            "_score": 1.0,
            "_source": {
               "artistName": "Eminem"
            }
         },
         {
            "_index": "so-60558525-auto",
            "_type": "_doc",
            "_id": "2",
            "_score": 1.0,
            "_source": {
               "artistName": "Emiten"
            }
         }