Elasticsearch7学习笔记之_doc类型被取消

0x00 概述

在使用ES7设置mapping的时候，发现报错如下：

The mapping definition cannot be nested under a type [_doc] unless include_type_name is set to true

0x00 问题复现

PUT my_index 
{
  "settings": {
    "analysis": {
      "char_filter": {
        "my_char_filter": {
          "type": "mapping",
          "mappings": [
            ", => "
          ]
        }
      },
      "filter": {
        "my_synonym_filter": {
          "type": "synonym",
          "expand": true,
          "synonyms": [
            "lileilei => leileili",
            "hanmeimei => meimeihan"
          ]
        }
      },
      "analyzer": {
        "my_analyzer": {
          "tokenizer": "my_tokenizer",
          "char_filter": [
            "my_char_filter"
          ],
          "filter": [
            "my_synonym_filter"  
          ]
        }
      },
      "tokenizer": {
        "my_tokenizer": {
          "type": "pattern",
          "pattern": "\;"
        }
      }
    }
  },
  "mappings": {
    "_doc": {
      "properties": {
        "text": {
          "type": "text",
          "analyzer": "my_analyzer"
        }
      }
    }
  }
}

报错详情

{
  "error" : {
    "root_cause" : [
      {
        "type" : "illegal_argument_exception",
        "reason" : "The mapping definition cannot be nested under a type [_doc] unless include_type_name is set to true."
      }
    ],
    "type" : "illegal_argument_exception",
    "reason" : "The mapping definition cannot be nested under a type [_doc] unless include_type_name is set to true."
  },
  "status" : 400
}

0x02 解决

es从6跨越到7，还是有些变化的；在es7中已经在内部取消了_doc这类type；

把上面的语句中删除_doc就行了，改成如下：

PUT my_index 
{
  "settings": {
    "analysis": {
      "char_filter": {
        "my_char_filter": {
          "type": "mapping",
          "mappings": [
            ", => "
          ]
        }
      },
      "filter": {
        "my_synonym_filter": {
          "type": "synonym",
          "expand": true,
          "synonyms": [
            "lileilei => leileili",
            "hanmeimei => meimeihan"
          ]
        }
      },
      "analyzer": {
        "my_analyzer": {
          "tokenizer": "my_tokenizer",
          "char_filter": [
            "my_char_filter"
          ],
          "filter": [
            "my_synonym_filter"  
          ]
        }
      },
      "tokenizer": {
        "my_tokenizer": {
          "type": "pattern",
          "pattern": "\;"
        }
      }
    }
  },
  "mappings": {

      "properties": {
        "text": {
          "type": "text",
          "analyzer": "my_analyzer"
        }
      }

  }
}