Elasticsearch定制分析器 [英] Elasticsearch custom analyser

问题描述

是否可以创建可按空间划分索引然后创建两个令牌的自定义Elasticsearch分析器？一是空间前的一切，二是空间。
例如：我存储的记录字段包含以下文本： 35 G。
现在，我想通过仅在该字段中键入 35或 35 G查询来接收该记录。
因此，Elastic应该创建两个令牌：['35'，'35 G']和更多令牌。

Is it possible to create custom elasticsearch analyser which can split index by space and then create two tokens? One, with everything before space and second, with everything. For example: I have stored record with field which has following text: '35 G'. Now I want to receive that record by typing only '35' or '35 G' query to that field. So elastic should create two tokens: ['35', '35 G'] and no more.

如果可能，如何实现？

推荐答案

可行使用 path_hierarchy 标记生成器。

Doable using path_hierarchy tokenizer.

PUT test
{
  "settings": {
    "analysis": {
      "analyzer": {
        "my_analyzer": {
          "tokenizer": "my_tokenizer"
        }
      },
      "tokenizer": {
        "my_tokenizer": {
          "type": "path_hierarchy",
          "delimiter": " "
        }
      }
    }
  }
  ...
}

现在

POST test/_analyze
{
  "analyzer": "my_analyzer",
  "text": "35 G"
}

输出

{
  "tokens": [
    {
      "token": "35",
      "start_offset": 0,
      "end_offset": 2,
      "type": "word",
      "position": 0
    },
    {
      "token": "35 G",
      "start_offset": 0,
      "end_offset": 4,
      "type": "word",
      "position": 0
    }
  ]
}

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