Elasticsearch: Exclude non-matching nested objects in results

Question

In Elasticsearch, is there any way to exclude the nested objects that don't match a particular query/filter from the resulting _source?

For example, let's say that a document has four objects in a nested field. Querying on the required filters results in only matching objects 1 and 3. When we get the results via _source, we will pull back the entire document along with objects 1,2,3,4.

Is it possible to exclude objects 2 and 4 from the results? Or is that something that we have to re-iterate and exclude using application-side logic?

Community · Accepted Answer · 2017-05-23 12:24:31Z

4

You can achieve this with use of inner_hits which will return you only matching nested objects. you can exclude this nested field in source.

Suggested by Val at: ElasticSearch - Get only matching nested objects with All Top level fields in search response

edited May 23, 2017 at 12:24

CommunityBot

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answered Nov 24, 2016 at 9:18

Jay Shah

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keety · Accepted Answer · 2015-01-21 22:08:26Z

3

At the moment there is no way to include only the matched nested objects in the result.

There is a inner_hits feature coming out in elasticsearch 1.5.0 which should help with this.

answered Jan 21, 2015 at 22:08

keety

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1 Comment

lbrazier Over a year ago

Great to hear. This is something I wanted to be able to do too, and couldn't find any way to do it currently.

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