# _id field 原文鏈接 : [https://www.elastic.co/guide/en/elasticsearch/reference/5.3/mapping-id-field.html](https://www.elastic.co/guide/en/elasticsearch/reference/5.3/mapping-id-field.html) 譯文鏈接 : [http://www.apache.wiki/display/Elasticsearch/_id+field](http://www.apache.wiki/display/Elasticsearch/_id+field) 貢獻者 : [朱彥安](/display/~zhuyanan)，[ApacheCN](/display/~apachecn)，[Apache中文網](/display/~apachechina) 每個索引的文檔都與一個?**_type?**（請參見“**[Mapping Types](https://www.elastic.co/guide/en/elasticsearch/reference/5.3/mapping.html#mapping-type)**”）和一個?**_id** 相關聯。? 該 **_id**字段不被索引，因為它的值可以從?**_uid?**字段自動導出。 該 **_id**字段的值可以在某些查詢（?**term?, ?terms?, ?match?, ?query_string?, ?simple_query_string?**）中訪問，但不能在 **aggregations**（聚合），**scripts**（腳本）或 **sorting**（排序）中使用，而應使用?**_uid?**字段代替 :? ``` # Example documents PUT my_index/my_type/1 { "text": "Document with ID 1" } PUT my_index/my_type/2&refresh=true { "text": "Document with ID 2" } GET my_index/_search { "query": { "terms": { "_id": [ "1", "2" ] # 1 } } } ``` | 1 | 在 **_id** 字段上查詢（參見 [**ids** 查詢](https://www.elastic.co/guide/en/elasticsearch/reference/5.3/query-dsl-ids-query.html)） |