Elasticsearch Dynamic Template

╰半夏微凉° 2023-07-07 11:21 46阅读 0赞

### 1）环境准备 ###

启动Elasticsearch https://blog.csdn.net/qq\_36918149/article/details/104221934  
启动Kinbana https://blog.csdn.net/qq\_36918149/article/details/104224625

### 2）什么是Dynamic Template？ ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM2OTE4MTQ5_size_16_color_FFFFFF_t_70]

### 3）通用模版 ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM2OTE4MTQ5_size_16_color_FFFFFF_t_70 1]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM2OTE4MTQ5_size_16_color_FFFFFF_t_70 2]

### 4）demo ###

演示一：根据类型和字段名  
\#创建一个通用index用于后面对比

PUT my_index/_doc/1
    { 
      "firstName":"Ruan",
      "isVIP":"true"
    }
    
    GET my_index/_mapping

结果：firstName、isVIP 两字段都被识别为text  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM2OTE4MTQ5_size_16_color_FFFFFF_t_70 3]

#删除已有index
    DELETE my_index
    # 创建dynamic_templates，以is开头的被识别为boolean类型，string类型匹配为keyword类型
    PUT my_index
    { 
      "mappings": { 
        "dynamic_templates": [
                { 
            "strings_as_boolean": { 
              "match_mapping_type":   "string",
              "match":"is*",
              "mapping": { 
                "type": "boolean"
              }
            }
          },
          { 
            "strings_as_keywords": { 
              "match_mapping_type":   "string",
              "mapping": { 
                "type": "keyword"
              }
            }
          }
        ]
      }
    }

#写数据验证一下
    PUT my_index/_doc/1
    { 
      "firstName":"Ruan",
      "isVIP":"true"
    }
    GET my_index/_mapping

结果：isVIP 字段被识别为boolean类型  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM2OTE4MTQ5_size_16_color_FFFFFF_t_70 4]

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