ngram没有处理符号elasticsearch

Question

这些是我的设置：

"nGram_filter": {
      "type": "nGram",
      "min_gram": 2,
      "max_gram": 20,
      "token_chars": [
        "letter",
        "digit",
        "punctuation",
        "symbol"
      ]
    }
  },
  "analyzer": {
    "nGram_analyzer": {
      "type": "custom",
      "tokenizer": "whitespace",
      "filter": [
        "lowercase",
        "asciifolding",
        "nGram_filter"
      ]
    },
    "whitespace_analyzer": {
      "type": "custom",
      "tokenizer": "whitespace",
      "filter": [
        "lowercase",
        "asciifolding"
      ]
    }
  }

我正在使用

"index_analyzer": "nGram_analyzer",
"search_analyzer": "whitespace_analyzer"

但我无法在像$这样的符号上获得ngram，附加curl请求

_analyze ? analyzer = nGram_analyzer ' -d '$100 '
{"tokens":[
  {"token":"10","start_offset":1,"end_offset":4,"type":"word","position":1},
  {"token":"100","start_offset":1,"end_offset":4,"type":"word","position":1},
  {"token":"00","start_offset":1,"end_offset":4,"type":"word","position":1}
 ]}

它没有给我签署令牌。如果你能告诉我哪里出错了，我将非常感激。