ElasticSearch - 使用连字符搜索

Question

Elasticsearch 1.6

我想为包含连字符的文本编制索引，例如 U-12、U-17、WU-12、T 恤……并能够使用“简单查询字符串”查询来搜索它们。

数据样本(简化):

{"title":"U-12 Soccer",
 "comment": "the t-shirts are dirty"}

由于已经有很多关于连字符的问题，我已经尝试了以下解决方案:

使用字符过滤器:ElasticSearch - Searching with hyphens in name .

所以我做了这个映射:

{
  "settings":{
    "analysis":{
      "char_filter":{
        "myHyphenRemoval":{
          "type":"mapping",
          "mappings":[
            "-=>"
          ]
        }
      },
      "analyzer":{
        "default":{
          "type":"custom",
          "char_filter":  [ "myHyphenRemoval" ],
          "tokenizer":"standard",
          "filter":[
            "standard",
            "lowercase"
          ]
        }
      }
    }
  },
  "mappings":{
    "test":{
      "properties":{
        "title":{
          "type":"string"
        },
        "comment":{
          "type":"string"
        }
      }
    }
  }
}

搜索是通过以下查询完成的:

{"_source":true,
  "query":{
    "simple_query_string":{
      "query":"<Text>",
      "default_operator":"AND"
    }
  }
}

1. 有效的方法:

   “U-12”、“U*”、“t*”、“ts*”

2. 什么没用:

   “U-*”、“u-1*”、“t-*”、“t-sh*”……

所以似乎没有对搜索字符串执行 char 过滤器？ 我可以做些什么来完成这项工作？

Answer 1

答案很简单:

引自 Igor Motov:Configuring the standard tokenizer

By default the simple_query_string query doesn't analyze the words with wildcards. As a result it searches for all tokens that start with i-ma. The word i-mac doesn't match this request because during analysis it's split into two tokens i and mac and neither of these tokens starts with i-ma. In order to make this query find i-mac you need to make it analyze wildcards:

{
  "_source":true,
  "query":{
    "simple_query_string":{
      "query":"u-1*",
      "analyze_wildcard":true,
      "default_operator":"AND"
    }
  }
}