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Elasticsearch将每个文档的ID更新为文档中另一个字段的值

[英]Elasticsearch update id of each document to a value of another field in the document

在Elasticsearch中,如何将每个文档的ID替换为文档中另一个字段的值?

我认为您无法更改索引中现有文档的ID,但可以在映射中使用path参数为它们重新编制索引。 这是一个简单的例子。

我使用映射中_id定义中的path参数设置了一个简单的索引,并添加了一些文档:

PUT /test_index
{
    "mappings": {
        "doc":{
            "_id": {
                "path": "number"
            },
            "properties": {
                "text_field": {
                    "type": "string"
                },
                "number": {
                    "type": "integer"
                }
            }
        }
    }
}

POST /test_index/doc/_bulk
{"index":{}}
{"text_field": "Apple TV","number":3}
{"index":{}}
{"text_field": "Apple iPhone","number":2}
{"index":{}}
{"text_field": "Apple MacBook","number":1}

然后,如果我进行搜索,我可以看到ID是按照我的要求设置的:

POST /test_index/_search
...
{
   "took": 2,
   "timed_out": false,
   "_shards": {
      "total": 5,
      "successful": 5,
      "failed": 0
   },
   "hits": {
      "total": 3,
      "max_score": 1,
      "hits": [
         {
            "_index": "test_index",
            "_type": "doc",
            "_id": "1",
            "_score": 1,
            "_source": {
               "text_field": "Apple MacBook",
               "number": 1
            }
         },
         {
            "_index": "test_index",
            "_type": "doc",
            "_id": "2",
            "_score": 1,
            "_source": {
               "text_field": "Apple iPhone",
               "number": 2
            }
         },
         {
            "_index": "test_index",
            "_type": "doc",
            "_id": "3",
            "_score": 1,
            "_source": {
               "text_field": "Apple TV",
               "number": 3
            }
         }
      ]
   }
}

这是我使用的代码:

http://sense.qbox.io/gist/933bd839b2d524889e483f50c59c37ffaab2270a

您可以通过定义_id的映射来做到这一点,如此处id-mapping所述

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