如何在elasticsearch中使用边ngram索引数据，其中也包括空格？

PUT /my_index
{
  "settings": {
    "analysis": {
      "analyzer": {
        "my_ngram_analyzer": {
          "tokenizer": "my_ngram_tokenizer"
        }
      },
      "tokenizer": {
        "my_ngram_tokenizer": {
          "type": "ngram",
          "min_gram": 1,
          "max_gram": 20,
          "token_chars": [
            "letter",
            "digit",
            "whitespace"
          ]
        }
      }
    }
  },
  "mappings": {
    "properties": {
      "my_field": {
        "type": "text",
        "analyzer": "my_ngram_analyzer"
      }
    }
  }
}

POST /my_index/_doc
{
  "my_field": "Hello World"
}

GET /my_index/_search
{
  "query": {
    "match": {
      "my_field": "Wor"
    }
  }
}