regex - Elasticsearch跳过@ -symbol

Question

我有一个提供了char过滤器的自定义分析器:

"char_filter": {
     "hash_repl": {
         "pattern": "(^[^\\#@].+)",
         "type": "pattern_replace",
         "preserve_original": "false",
         "replacement": "$1 #$1 @$1"
      }
  }

当我发送测试分析仪的POST请求时，我正在等待以下行为:

a => a #a @a
#a => #a
@a => @a

问题是 flex 不会在响应中显示“@”符号，通常我会得到

a => a #a a
#a => #a
@a => a

Answer 1

好吧，解决方案很容易。我的自定义分析器还包含几个字符过滤器和 token 过滤器。通过添加自定义映射解决了该问题:

"char_filter": {
    "custom": {
        "type": "mapping",
        "mappings": [
            "#=>|#"
        ]
      }
},
"filter": {
    "custom": {
        "type": "word_delimiter",
        "type_table": [
            "# => ALPHA",
            "@ => ALPHA"
         ],
         "split_on_numerics": "false"
     }
}