ElasticSearch - 使用连字符搜索 [英] ElasticSearch - Searching with hyphens

问题描述

弹性搜索 1.6

我想索引包含连字符的文本，例如 U-12、U-17、WU-12、t 恤……并且能够使用简单查询字符串"查询来搜索它们.

I want to index text that contains hyphens, for example U-12, U-17, WU-12, t-shirt... and to be able to use a "Simple Query String" query to search on them.

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:

As there are quite a lot of questions already about hyphens, I tried the following solution already:

使用字符过滤器:ElasticSearch - 在名称中使用连字符搜索.

所以我选择了这个映射:

So I went for this mapping:

{
  "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"
        }
      }
    }
  }
}

使用以下查询完成搜索:

Searching is done with the following query:

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

1. 什么有效:

1. What works:

U-12"、U*"、t*"、ts*"

"U-12", "U*", "t*", "ts*"

无效的地方:

"U-*", "u-1*", "t-*", "t-sh*", ...

"U-*", "u-1*", "t-*", "t-sh*", ...

所以似乎没有对搜索字符串执行字符过滤器?我能做些什么来完成这项工作?

So it seems the char filter is not executed on search strings? What could I do to make this work?

推荐答案

答案很简单:

引自 Igor Motov:配置标准分词器

Quote from Igor Motov: Configuring the standard tokenizer

默认情况下 simple_query_string 查询不分析单词带通配符.结果它搜索所有以我是一个.单词 i-mac 与此请求不匹配，因为在分析它分为两个标记 i 和 mac 并且这两个都不是代币以 i-ma 开头.为了使这个查询找到 i-mac 你需要让它分析通配符:

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"
    }
  }
}

这篇关于ElasticSearch - 使用连字符搜索的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！