elasticsearch - 在 Elasticsearch 中将字段重命名为新索引

Question

我有这个映射的索引:

curl -XPUT 'http://localhost:9200/origindex/_mapping/page' -d '
   {
    "page" : {
        "properties" : {
            "title" : {"type" : "text"},
            "body" : {"type" : "text"},
            "other": {"type": "text"}
        }
     }
   }'

在新索引中，我想将“title”复制到“title1”和“title2”，将“body”复制到“body1”和“body2”(忽略“other”)，并将类型从“page”更改为”到“articles_eng”。新索引具有此映射:

curl -XPUT 'http://localhost:9200/newindex/_mapping/articles_eng' -d '                             
{                                                                                                  
    "articles_eng" : {                                                                             
        "properties" : {                                                                           
            "title1" : {                                                                     
                 "type" : "text",                                                                  
                 "analyzer" : "my_analyzer1"                                                    
             },                                                                                     
            "title2" : {                                                                   
                 "type" : "text",                                                                  
                 "analyzer": "my_analyzer2"                                                    
             },                                                                                     
            "body1": {                                                                       
                "type" : "text",                                                                  
                "analyzer": "my_analyzer1"                                                     
            },                                                                                     
            "body2" : {                                                                     
                "type" : "text",                                                                  
                "analyzer": "my_analyzer2" 
            }                                                   
        }                                                                                      
    }                                                                                          
}'                                                                                              

从看this answer和 Elasticsearch reindex docs我想出了这样的事情:

curl -XPOST http://localhost:9200/_reindex -d '{                                                   
    "source": {                                                                                    
        "index": "origindex",                                                                          
        "type": "page",                                                                            
        "query": {                                                                                 
           "match_all": {}                                                                         
        },                                                                                         
        "_source": [ "title", "body" ]                                                             
    },                                                                                             
    "dest": {                                                                                      
        "index": "newindex"                                                                        
    },                                                                                             
    "script": {                                                                                    
        "inline": "ctx._type = \"articles_eng\"";                                                  
                  "ctx._title1 = ctx._source._title";                                         
                  "ctx._title2 = ctx._source._title";                                       
                  "ctx._body1 = ctx._source._body";                                          
                  "ctx._body2 = ctx._source._body"                                                                                                   
    }                                                                                              
}'

我在处理脚本行时遇到了问题。如果我只做第一行(更改文档类型)，一切正常。如果我添加其余的行，我会得到一个错误

"[reindex] failed to parse field [script]"

由

引起

"Unexpected character (';' (code 59)): was expecting comma to separate Object entries\n at [Source: org.elasticsearch.transport.netty4.ByteBufStreamInput@37649463; line: 14, column: 50]"

即使我可以解决多个语句的问题，只输入第二行也会出现错误

"Invalid fields added to context [title1]"}]

谁能帮帮我？看起来这应该不是不可能的。

Answer 1

If I do only the top line (changing the document type), everything works fine. If I add the rest of the lines, I get an error

您不需要将所有内联语句都放在双引号中，而是可以将所有内联脚本语句用分号 (;) 分隔并放在双引号 (") 如下图:

"script": {
    "inline": "ctx._source.title1 = ctx._source.title; ctx._source.title2 = ctx._source.remove(\"title\");ctx._source.body1 = ctx._source.body; ctx._source.body2 = ctx._source.remove(\"body\");ctx._type=\"articles_eng\""
}

Even if I can sort out the issue with the multiple statements, putting in just the second line gives me the error

您正在尝试以错误的方式访问源字段。元数据字段(如 _id、_type、_index ..)应作为 ctx._type/ctx._id 访问，其中作为源字段(如title, body, other 在你的情况下)应该作为 ctx._source.title/ctx._source.body 访问。

最后，您的 ReIndex 查询应如下所示:

POST _reindex
{
  "source": {
    "index": "origindex",
    "_source": [ "title", "body" ]
  },
  "dest": {
    "index": "newindex"
  },
  "script": {
    "inline": "ctx._source.title1 = ctx._source.title; ctx._source.title2 = ctx._source.remove(\"title\");ctx._source.body1 = ctx._source.body; ctx._source.body2 = ctx._source.remove(\"body\");ctx._type=\"articles_eng\""
  }
}

希望这对您有所帮助!