在弹性搜索中重命名字段 [英] Renaming fields in elasticsearch

问题描述

我有这样的文件

  {
_index：testindex，
 _type：logs，
_id：1，
_score：1，
_source：{
field1：data1 ，
field2：data2
} 
} 
  

我需要将 field2 更改为 Request.field3

  {
_index：testindex，
_type：logs，
_id：1，
_score：1，
_source：{
field1：data1，
请求：{
field3：data2
} 
} 
} 
  

为此，首先添加一个字段映射到现有索引

  PUT testindex / _mapping / logs 
 {
properties：
 {
请求：
 {
属性：
 {
field3：
 {
 ：string
} 
} 
} 
} 
} 
  

然后尝试重新索引

  POST _reindex 
 {
source： {
index：testindex
}，
dest：{
index：testindex1
}，
脚本：{
inline：ctx._source.Request.field3 = ctx._source.remove（\field2\）
} 
} 
  

错误是

  reason：无法运行内联脚本[ctx._source.Request.field3 = ctx._source.remove（\field2\）]使用lang [groovy]，
causes_by：{ 
type：null_pointer_exception，
reason：无法在空对象上设置属性field3
} 
  

解决方案

您的文档中尚未存在请求字段您的脚本需要先创建它：

  POST _reindex 
 {
source：{
index：testindex
}，
dest {
index：testindex1
}，
script：{
inline：ctx._source.Request = [：]; ctx._source.Request.field3 = ctx._source.remove（\field2\）]
} 
} 
  
  POST _reindex 
 {
source：{
index：testindex
}，
dest：{
index：testindex1
}，
script：{
inline：ctx._source.Request = [field3：ctx._source.remove（\field2\）]
 } 
} 
  
 
I have a document like this
{
    "_index": "testindex",
    "_type": "logs",
    "_id": "1",
    "_score": 1,
    "_source": {
      "field1": "data1",
      "field2": "data2"
    }
}
I need to change the field2 to Request.field3
{
    "_index": "testindex",
    "_type": "logs",
    "_id": "1",
    "_score": 1,
    "_source": {
      "field1": "data1",
      "Request": {
        "field3": "data2"
      }
    }
}
For this, first added a field mapping to existing index
PUT testindex/_mapping/logs
{
    "properties": 
    { 
        "Request": 
        {
            "properties": 
            {
                "field3" : 
                {
                    "type": "string"
                }
            }
        }   
    }  
}
Then tried reindexing
POST _reindex
{
    "source": {
        "index": "testindex"
    },
    "dest": {
        "index": "testindex1"
    },
    "script": {
        "inline": "ctx._source.Request.field3 = ctx._source.remove(\"field2\")"
    }
}
Error is
"reason": "failed to run inline script [ctx._source.Request.field3 = ctx._source.remove(\"field2\")] using lang [groovy]",
"caused_by": {
    "type": "null_pointer_exception",
    "reason": "Cannot set property 'field3' on null object"
}

解决方案
The Request field does not yet exist in your documents, so your script needs to create it first:
POST _reindex
{
    "source": {
        "index": "testindex"
    },
    "dest": {
        "index": "testindex1"
    },
    "script": {
        "inline": "ctx._source.Request = [:]; ctx._source.Request.field3 = ctx._source.remove(\"field2\") ]"
    }
}
Or a bit shorter like this:
POST _reindex
{
    "source": {
        "index": "testindex"
    },
    "dest": {
        "index": "testindex1"
    },
    "script": {
        "inline": "ctx._source.Request = [field3: ctx._source.remove(\"field2\") ]"
    }
}


                        
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