Elasticsearch：根映射定义具有不受支持的参数答案

【问题标题】：Elasticsearch : Root mapping definition has unsupported parameterElasticsearch：根映射定义具有不受支持的参数
【发布时间】：2020-12-21 14:17:47
【问题描述】：

我正在创建一种通过 Elasticsearch 和 Kibana 搜索泰语单词的方法。我的映射有问题。

PUT test
{
  "settings": {
    "analysis": {
      "analyzer": {
        "trigrams": {
          "tokenizer": "trigram_tokenizer",
          "filter": [
            "lowercase"
          ]
        }
      },
      "tokenizer": {
        "trigram_tokenizer": {
          "type": "ngram",
          "min_ngram": 3,
          "max_ngram": 3,
          "token_chars": []
        }
      }
    }
  },
  "mappings": {
    "true_name": {
      "properties": {
        "correct": { "type": "text", "analyzer": "trigrams" }
      }
    }
  }
}

这样的错误

{
  "error" : {
    "root_cause" : [
      {
        "type" : "mapper_parsing_exception",
        "reason" : "Root mapping definition has unsupported parameters:  [true_name : {properties={correct={analyzer=trigrams, type=text}}}]"
      }
    ],
    "type" : "mapper_parsing_exception",
    "reason" : "Failed to parse mapping [_doc]: Root mapping definition has unsupported parameters:  [true_name : {properties={correct={analyzer=trigrams, type=text}}}]",
    "caused_by" : {
      "type" : "mapper_parsing_exception",
      "reason" : "Root mapping definition has unsupported parameters:  [true_name : {properties={correct={analyzer=trigrams, type=text}}}]"
    }
  },
  "status" : 400
}

【问题讨论】：

标签： elasticsearch mapping

【解决方案1】：

不推荐使用映射类型。请参阅此documentation 了解有关删除映射类型的更多信息。

在 Elasticsearch 6.0.0 或更高版本中创建的索引只能包含单一映射类型。在 5.x 中创建的具有多个映射的索引 types 将继续像以前一样在 Elasticsearch 6.x 中起作用。类型将在 Elasticsearch 7.0.0 的 API 中弃用，并且完全在 8.0.0 中删除。

{
  "settings": {
    "analysis": {
      "analyzer": {
        "trigrams": {
          "tokenizer": "trigram_tokenizer",
          "filter": [
            "lowercase"
          ]
        }
      },
      "tokenizer": {
        "trigram_tokenizer": {
          "type": "ngram",
          "min_ngram": 3,
          "max_ngram": 3,
          "token_chars": []
        }
      }
    }
  },
  "mappings": {            // note this
    "properties": {
      "correct": {
        "type": "text",
        "analyzer": "trigrams"
      }
    }
  }
}

如果你的 JSON 文档是这样的：

{
  "true_name": {
    "correct": "mapping types deprecated"
  }
}

那么索引映射将是-

{
  "settings": {
    "analysis": {
      "analyzer": {
        "trigrams": {
          "tokenizer": "trigram_tokenizer",
          "filter": [
            "lowercase"
          ]
        }
      },
      "tokenizer": {
        "trigram_tokenizer": {
          "type": "ngram",
          "min_ngram": 3,
          "max_ngram": 3,
          "token_chars": []
        }
      }
    }
  },
  "mappings": {
    "properties": {              // note this
      "true_name": {
        "properties": {
          "correct": {
            "type": "text",
            "analyzer": "trigrams"
          }
        }
      }
    }
  }
}

【讨论】：