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  • Mapping






    dynamic针对的是新增的字段,不是对mapping中已有的字段 (原有mapping中的字段不受影响,只影响新增的字段)
    当dynamic被设置成false的时候,存在新增字段可以被写入到索引文件中,该字段可以被查看到,但是查询不到,同时索引的mapping也为更新显示该新增的字段。
    针对整个索引的优先级最高,那么对索引中某个字段设置dynamic为true就不生效了

    # 设置索引的mappings,不用事先创建索引
    PUT my_index
    {
      "mappings": {
        "dynamic": false, 
        "properties": {
          "user": { 
            "properties": {
              "name": {
                "type": "text"
              },
              "social_networks": { 
                "dynamic": true,
                "properties": {}
              }
            }
          }
        }
      }
    }
    
    # 查看索引的mappings
    GET my_index/_mapping
    
    # 手动往索引写入一条数据,写入成功(创建的mapping中有这个字段)
    PUT my_index/_doc/1
    {
      "user.name":"haha"
    }
    
    # 可以查看到数据
    GET my_index/_doc/1
    
    # 可以查询出来
    GET my_index/_search
    {
      "query": {
        "term": {
          "user.name": {
            "value": "haha"
          }
        }
      }
    }
    
    # 手动往索引写入一条数据,写入成功(创建的mapping中没有这个字段)
    PUT my_index/_doc/2
    {
      "age":22
    }
    
    # 可以查看到数据
    GET my_index/_doc/2
    
    # 查看mapping,还是刚开始创建的,未更新age字段
    GET my_index/_mapping
    
    # 查询不出来
    GET my_index/_search
    {
      "query": {
        "term": {
          "age": {
            "value": 22
          }
        }
      }
    }
    
    # 索引字段设置dynamic为true的,在这个原有字段下面再新增字段,写入成功
    PUT my_index/_doc/3
    {
      "social_networks.ip":"127.0.0.1"
    }
    
    # 查看,可以显示
    GET my_index/_doc/3
    
    # 查询不出来
    GET my_index/_search
    {
      "query": {
        "term": {
          "social_networks.ip": {
            "value": "127.0.0.1"
          }
        }
      }
    }
    
    # 查看mapping,还是刚开始创建的,未更新social_networks中的ip字段
    GET my_index/_mapping
    
    # 往已经存在的文档中更新原先不存在的字段数据,成功
    POST my_index/_update/1
    {
      "doc": {
        "social_networks.ip": "127.0.0.1"
      }
    }
    
    # 可以查看到
    GET my_index/_doc/1
    
    # 查询不出来
    GET my_index/_search
    {
      "query": {
        "term": {
          "social_networks.ip": {
            "value": "127.0.0.1"
          }
        }
      }
    }
    
    # 给新索引创建mapping,设置dynamic为strict
    PUT test
    {
      "mappings": {
        "dynamic": "strict", 
        "properties": {
          "user": { 
                "type": "text"
              }
          }
        }
    }
    
    # 查看mapping
    GET test/_mapping
    
    # 新增文档,字段为mapping中已有的字段,成功
    PUT test/_doc/1
    {
      "user":"haha"
    }
    
    # 新增文档,字段为mapping中没有的字段,报错400
    PUT test/_doc/2
    {
      "name":"haha"
    }
    
    
    
    
    #写入文档,查看 Mapping
    PUT mapping_test/_doc/1
    {
      "firstName":"Chan",
      "lastName": "Jackie",
      "loginDate":"2018-07-24T10:29:48.103Z"
    }
    
    #查看 Mapping文件
    GET mapping_test/_mapping
    
    
    #Delete index
    DELETE mapping_test
    
    #dynamic mapping,推断字段的类型
    PUT mapping_test/_doc/1
    {
        "uid" : "123",
        "isVip" : false,
        "isAdmin": "true",
        "age":19,
        "heigh":180
    }
    
    #查看 Dynamic
    GET mapping_test/_mapping
    
    
    #默认Mapping支持dynamic,写入的文档中加入新的字段
    PUT dynamic_mapping_test/_doc/1
    {
      "newField":"someValue"
    }
    
    #该字段可以被搜索,数据也在_source中出现
    POST dynamic_mapping_test/_search
    {
      "query":{
        "match":{
          "newField":"someValue"
        }
      }
    }
    
    
    ######################### 修改为dynamic false ######################### 
    PUT dynamic_mapping_test/_mapping
    {
      "dynamic": false
    }
    
    #新增 anotherField
    PUT dynamic_mapping_test/_doc/10
    {
      "anotherField":"someValue"
    }
    
    
    #该字段不可以被搜索,因为dynamic已经被设置为false
    POST dynamic_mapping_test/_search
    {
      "query":{
        "match":{
          "anotherField":"someValue"
        }
      }
    }
    
    get dynamic_mapping_test/_doc/10
    
    #修改为strict
    PUT dynamic_mapping_test/_mapping
    {
      "dynamic": "strict"
    }
    
    
    
    #写入数据出错,HTTP Code 400
    PUT dynamic_mapping_test/_doc/12
    {
      "lastField":"value"
    }
    
    DELETE dynamic_mapping_test
    
    
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  • 原文地址:https://www.cnblogs.com/sanduzxcvbnm/p/14512800.html
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