# Fields in more-like-this queries **URL:** \ **Category:** Elasticsearch\ **Created:** [February 8, 2011, 5:58am UTC](https://discuss.elastic.co/t/fields-in-more-like-this-queries/3897 "2011-02-08T05:58:31Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![byuva](https://avatars.discourse-cdn.com/v4/letter/b/b5ac83/32.png) [@byuva](https://discuss.elastic.co/u/byuva)\ **Post date:** [February 8, 2011, 5:58am UTC](https://discuss.elastic.co/t/fields-in-more-like-this-queries/3897/1 "2011-02-08T05:58:31Z")
I would like to find similar documents but just need the ids, not the actual \_source. Normally the "fields" parameter controls the fields returned but with the MLT api it seems to control the fields on which the MLT is applied (and seems to always return the \_source). -b ---
**Author:** ![Clinton\_Gormley](https://avatars.discourse-cdn.com/v4/letter/c/50afbb/32.png) [@Clinton\_Gormley](https://discuss.elastic.co/u/Clinton_Gormley)\ **Post date:** [February 8, 2011, 9:57am UTC](https://discuss.elastic.co/t/fields-in-more-like-this-queries/3897/2 "2011-02-08T09:57:46Z")
On Mon, 2011-02-07 at 21:58 -0800, merrellb wrote: > I would like to find similar documents but just need the ids, not the > actual \_source. Normally the "fields" parameter controls the fields > returned but with the MLT api it seems to control the fields on which > the MLT is applied (and seems to always return the \_source). MLT just gets converted into a normal search, which uses the "mlt" query > **[Elasticsearch Platform — Find real-time answers at scale](https://www.elastic.co)** > > Power insights and outcomes with the Elasticsearch Platform and AI. See into your data and find answers that matter with enterprise solutions designed to help you build, observe, and protect. Try Elasticsearch free today. If you use that yourself, then you get search's interface clint ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [July 6, 2017, 4:12am UTC](https://discuss.elastic.co/t/fields-in-more-like-this-queries/3897/3 "2017-07-06T04:12:23Z")