es添加字段并赋值

es feild script
Publish Date:   2020-05-22

添加字段即

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PUT /index/_mapping
{
    ...
}
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给es添加字段

这里主要通过script脚本.
并且在elasticsearch1.3后这个默认配置是被关掉的.

即在elasticsearch.yml中添加
script.inline=true
script.indexed=true
一开始我在true后面加了空格,配置不被识别,所以这里要注意

开启了script.line后通过update_by_query进行操作,这里注意以下写法已经过时

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POST /index/_update_by_query?conflicts=proceed
{
  "script":{
    "lang":"painless",
    "inline": "ctx._source.name='trhee'"
  }
}

即inline这种写法已经过时. 现在主要用的是source

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POST /index/_update_by_query?conflicts=proceed
{
  "script":{
    "lang":"painless",
    "source": "ctx._source.name='trhee'"
  }
}

还能加入条件判断

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POST /index/_update_by_query?conflicts=proceed
{
  "script":{
    "lang":"painless",
    "source": "if(ctx._source.name==''){ctx._source.name='trhee'}"
  }
}

至此即可以实现对_source.name字段的数据进行默认赋值

Author: Kuiq Wang
Link: http://www.wqkenqing.ren/2020/05/22/%E6%97%A5%E5%B8%B8%E6%80%BB%E7%BB%93/%E8%BF%90%E7%BB%B4/es%E6%B7%BB%E5%8A%A0%E5%AD%97%E6%AE%B5%E5%92%8C%E9%BB%98%E8%AE%A4%E5%80%BC/
Reprint policy: All articles in this blog are used except for special statements CC BY 4.0 reprint policy. If reproduced, please indicate source Kuiq Wang !
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