【Elasticsearch教程17】Mapping字段类型之token_count

• token_count一般integer类型，并且是作为text类型的子字段，它接收字符串后，分析出这个字符串在分词后都多少个token。
• token_count在特定场景还是挺方便的

插入一个mapping，其中length是name的子字段。

PUT pigg_test_token
{
  "mappings": {
    "properties": {
      "name": { 
        "type": "text",
        "fields": {
          "length": { 
            "type":     "token_count",
            "analyzer": "standard"
          }
        }
      }
    }
  }
}
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插入2条数据

PUT pigg_test_token/_doc/1
{ "name": "我可是亚瑟王" }


PUT pigg_test_token/_doc/2
{ "name": "鼓励王" }

PUT pigg_test_token/_doc/3
{ "name": ["亚瑟王", "我爱玩亚瑟"] }
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查询name是3个字的文档

"hits" : [
    {
      "_index" : "pigg_test_token",
      "_type" : "_doc",
      "_id" : "2",
      "_score" : 1.0,
      "_source" : {
        "name" : "鼓励王"
      }
    },
    {
      "_index" : "pigg_test_token",
      "_type" : "_doc",
      "_id" : "3",
      "_score" : 1.0,
      "_source" : {
        "name" : [
          "亚瑟王",
          "我爱玩亚瑟"
        ]
      }
    }
]
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返回如下：

"hits" : [
    {
      "_index" : "pigg_test_token",
      "_type" : "_doc",
      "_id" : "2",
      "_score" : 1.0,
      "_source" : {
        "name" : "鼓励王"
      }
    },
    {
      "_index" : "pigg_test_token",
      "_type" : "_doc",
      "_id" : "3",
      "_score" : 1.0,
      "_source" : {
        "name" : [
          "亚瑟王",
          "我爱玩亚瑟"
        ]
      }
    }
]
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