在 elasticsearch 中未正确搜索电子邮件 [英] Emails not being searched properly in elasticsearch

问题描述

我在 elasticsearch 中索引了一些以电子邮件 ID 作为字段的文档.但是当我查询特定的电子邮件 ID 时，搜索结果会显示所有文档而没有过滤.

I have indexed a few documents in elasticsearch which have email ids as a field. But when I query for a specific email id, the search results are showing all the documents without filtering.

这是我用过的查询

{
 "query": {
   "match": {
     "mail-id": "[e-mail]"
   }
 }
}

推荐答案

默认情况下，您的 mail-id 字段由标准分析器分析，该分析器将对电子邮件 abc@gmail 进行标记.com 变成以下两个标记:

By default, your mail-id field is analyzed by the standard analyzer which will tokenize the email [e-mail] into the following two tokens:

{
  "tokens" : [ {
    "token" : "abc",
    "start_offset" : 0,
    "end_offset" : 3,
    "type" : "<ALPHANUM>",
    "position" : 1
  }, {
    "token" : "gmail.com",
    "start_offset" : 4,
    "end_offset" : 13,
    "type" : "<ALPHANUM>",
    "position" : 2
  } ]
}

您需要的是使用 UAX 电子邮件 URL 标记器，它将电子邮件地址标记为一个标记.

What you need instead is to create a custom analyzer using the UAX email URL tokenizer, which will tokenize email addresses as a one token.

所以你需要定义你的索引如下:

So you need to define your index as follows:

curl -XPUT localhost:9200/people -d '{
  "settings": {
    "analysis": {
      "analyzer": {
        "my_analyzer": {
          "type": "custom",
          "tokenizer": "uax_url_email"
        }
      }
    }
  },
  "mappings": {
    "person": {
      "properties": {
        "mail-id": {
          "type": "string",
          "analyzer": "my_analyzer"
        }
      }
    }
  }
}'

创建该索引后，您可以看到电子邮件 [e-mail] 将被标记为单个标记，您的搜索将按预期进行.

After creating that index, you can see that the email [e-mail] will be tokenized as a single token and your search will work as expected.

 curl -XGET 'localhost:9200/people/_analyze?analyzer=my_analyzer&pretty' -d '[e-mail]'
{
  "tokens" : [ {
    "token" : "[e-mail]",
    "start_offset" : 0,
    "end_offset" : 13,
    "type" : "<EMAIL>",
    "position" : 1
  } ]
}

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