# Aggregation on multiple fiels\_uid or \_id field

**URL:** <https://discuss.elastic.co/t/aggregation-on-multiple-fiels-uid-or--id-field/27038>\
**Category:** Elasticsearch\
**Created:** [August 7, 2015, 10:15am UTC](https://discuss.elastic.co/t/aggregation-on-multiple-fiels-uid-or--id-field/27038 "2015-08-07T10:15:35Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![pinokio](https://avatars.discourse-cdn.com/v4/letter/p/da6949/32.png) [@pinokio](https://discuss.elastic.co/u/pinokio)\
**Post date:** [August 7, 2015, 10:15am UTC](https://discuss.elastic.co/t/aggregation-on-multiple-fiels-uid-or--id-field/27038/1 "2015-08-07T10:15:35Z")

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Hi,  
I am developing aggregation using \_uid or \_id field.  
I can use this internal field in facet (getting field mapper and pass it to FacetExecutor), how ever I do not know how to do the same using aggregation?  
Thank you!

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [July 5, 2017, 11:56pm UTC](https://discuss.elastic.co/t/aggregation-on-multiple-fiels-uid-or--id-field/27038/2 "2017-07-05T23:56:50Z")

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Closed on July 5, 2017, 11:56pm UTC