Elasticsearch Dynamic Mapping

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发布于: 2021 年 03 月 08 日

Elasticsearch Dynamic Mapping，内容来自 B 站中华石杉 Elasticsearch 顶尖高手系列课程核心知识篇，英文内容来自 Elasticsearch: The Definitive Guide [2.x]。

Dynamic Mapping

https://www.elastic.co/guide/en/elasticsearch/guide/2.x/dynamic-mapping.html

When Elasticsearch encounters a previously unknown field in a document, it uses dynamic mapping to determine the datatype for the field and automatically adds the new field to the type mapping.

dynamic setting 定制 dynamic 策略

true：遇到陌生字段，就进行 dynamic mapping
false：遇到陌生字段，就忽略
strict：遇到陌生字段，就报错

PUT /my_index{  "mappings": {    "my_type": {      "dynamic": "strict",      "properties": {        "title": {          "type": "text"        },        "address": {          "type": "object",          "dynamic": "true"        }      }    }  }}
PUT /my_index/my_type/1{  "title": "my article",  "content": "this is my article",  "address": {    "province": "guangdong",    "city": "guangzhou"  }}
{  "error": {    "root_cause": [      {        "type": "strict_dynamic_mapping_exception",        "reason": "mapping set to strict, dynamic introduction of [content] within [my_type] is not allowed"      }    ],    "type": "strict_dynamic_mapping_exception",    "reason": "mapping set to strict, dynamic introduction of [content] within [my_type] is not allowed"  },  "status": 400}
PUT /my_index/my_type/1{  "title": "my article",  "address": {    "province": "guangdong",    "city": "guangzhou"  }}
GET /my_index/_mapping/my_type
{  "my_index": {    "mappings": {      "my_type": {        "dynamic": "strict",        "properties": {          "address": {            "dynamic": "true",            "properties": {              "city": {                "type": "text",                "fields": {                  "keyword": {                    "type": "keyword",                    "ignore_above": 256                  }                }              },              "province": {                "type": "text",                "fields": {                  "keyword": {                    "type": "keyword",                    "ignore_above": 256                  }                }              }            }          },          "title": {            "type": "text"          }        }      }    }  }}

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发布于: 2021 年 03 月 08 日阅读数: 17

原文链接:【http://xie.infoq.cn/article/d81e48a5fd14ebabbad1e3760】。

escray

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