# Combined document id combined form several fields? **URL:** \ **Category:** Elasticsearch\ **Created:** [November 18, 2012, 6:38pm UTC](https://discuss.elastic.co/t/combined-document-id-combined-form-several-fields/9753 "2012-11-18T18:38:53Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![haizaar](https://avatars.discourse-cdn.com/v4/letter/h/3d9bf3/32.png) [@haizaar](https://discuss.elastic.co/u/haizaar)\ **Post date:** [November 18, 2012, 6:38pm UTC](https://discuss.elastic.co/t/combined-document-id-combined-form-several-fields/9753/1 "2012-11-18T18:38:53Z")
Hi, I've read [http://www.elasticsearch.org/guide/reference/mapping/id-field.html](http://www.elasticsearch.org/guide/reference/mapping/id-field.html) and have a followup question: Is that possible to construct document id from several fields? For example, user's First and Last names? I've tried something like { "\_id" : { "path" : ["first\_name", "last\_name"] } } } But it falls back to default auto ID. -- ---
**Author:** ![Itamar\_Syn\_Hershko](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/itamar_syn_hershko/32/725_2.png) [@Itamar\_Syn\_Hershko](https://discuss.elastic.co/u/Itamar_Syn_Hershko)\ **Post date:** [November 18, 2012, 6:45pm UTC](https://discuss.elastic.co/t/combined-document-id-combined-form-several-fields/9753/2 "2012-11-18T18:45:55Z")
Create a field, unstored and not indexed, with the value you want, and set the path to it On Sun, Nov 18, 2012 at 8:38 PM, Zaar Hai [haizaar@gmail.com](mailto:haizaar@gmail.com) wrote: > Hi, > > I've read > [Elasticsearch Platform — Find real-time answers at scale | Elastic](http://www.elasticsearch.org/guide/reference/mapping/id-field.html) and > have a followup question: > > Is that possible to construct document id from several fields? For > example, user's First and Last names? > > I've tried something like > { > "\_id" : { > "path" : ["first\_name", "last\_name"] > } > } > } > > But it falls back to default auto ID. > > -- -- ---
**Author:** ![haizaar](https://avatars.discourse-cdn.com/v4/letter/h/3d9bf3/32.png) [@haizaar](https://discuss.elastic.co/u/haizaar)\ **Post date:** [November 18, 2012, 7:56pm UTC](https://discuss.elastic.co/t/combined-document-id-combined-form-several-fields/9753/3 "2012-11-18T19:56:51Z")
Yeah, that's an easy cheat 🙂 But I do not want another field. May be there is a way to apply a script to generate an ID? On 18 בנוב 2012, at 20:45, Itamar Syn-Hershko [itamar@code972.com](mailto:itamar@code972.com) wrote: Create a field, unstored and not indexed, with the value you want, and set the path to it On Sun, Nov 18, 2012 at 8:38 PM, Zaar Hai [haizaar@gmail.com](mailto:haizaar@gmail.com) wrote: > Hi, > > I've read > [Elasticsearch Platform — Find real-time answers at scale | Elastic](http://www.elasticsearch.org/guide/reference/mapping/id-field.html) and > have a followup question: > > Is that possible to construct document id from several fields? For > example, user's First and Last names? > > I've tried something like > { > "\_id" : { > "path" : ["first\_name", "last\_name"] > } > } > } > > But it falls back to default auto ID. > > -- -- -- ---
**Author:** ![Itamar\_Syn\_Hershko](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/itamar_syn_hershko/32/725_2.png) [@Itamar\_Syn\_Hershko](https://discuss.elastic.co/u/Itamar_Syn_Hershko)\ **Post date:** [November 18, 2012, 8:53pm UTC](https://discuss.elastic.co/t/combined-document-id-combined-form-several-fields/9753/4 "2012-11-18T20:53:41Z")
Why do you care about another field if it isn't indexed? On Sun, Nov 18, 2012 at 9:56 PM, Zaar Hai [haizaar@gmail.com](mailto:haizaar@gmail.com) wrote: > Yeah, that's an easy cheat 🙂 > But I do not want another field. > > May be there is a way to apply a script to generate an ID? > > On 18 בנוב 2012, at 20:45, Itamar Syn-Hershko [itamar@code972.com](mailto:itamar@code972.com) wrote: > > Create a field, unstored and not indexed, with the value you want, and set > the path to it > > On Sun, Nov 18, 2012 at 8:38 PM, Zaar Hai [haizaar@gmail.com](mailto:haizaar@gmail.com) wrote: > > > Hi, > > > > I've read > > [Elasticsearch Platform — Find real-time answers at scale | Elastic](http://www.elasticsearch.org/guide/reference/mapping/id-field.html) and > > have a followup question: > > > > Is that possible to construct document id from several fields? For > > example, user's First and Last names? > > > > I've tried something like > > { > > "\_id" : { > > "path" : ["first\_name", "last\_name"] > > } > > } > > } > > > > But it falls back to default auto ID. > > > > -- > > -- > > -- -- ---
**Author:** ![haizaar](https://avatars.discourse-cdn.com/v4/letter/h/3d9bf3/32.png) [@haizaar](https://discuss.elastic.co/u/haizaar)\ **Post date:** [November 19, 2012, 8:52am UTC](https://discuss.elastic.co/t/combined-document-id-combined-form-several-fields/9753/5 "2012-11-19T08:52:53Z")
I don't like keeping redundant information around, especially when I'm going to have 100m+ documents. If I'm gong to generate ID myself, then I better supply it directly as document ID while indexing it, instead of keeping as a field. Zaar On Sunday, November 18, 2012 10:53:46 PM UTC+2, Itamar Syn-Hershko wrote: > Why do you care about another field if it isn't indexed? > > On Sun, Nov 18, 2012 at 9:56 PM, Zaar Hai \<[hai...@gmail.com](mailto:hai...@gmail.com) \\>wrote: > > > Yeah, that's an easy cheat 🙂 > > But I do not want another field. > > > > May be there is a way to apply a script to generate an ID? > > > > On 18 בנוב 2012, at 20:45, Itamar Syn-Hershko \<[ita...@code972.com](mailto:ita...@code972.com)\\> > > wrote: > > > > Create a field, unstored and not indexed, with the value you want, and > > set the path to it > > > > On Sun, Nov 18, 2012 at 8:38 PM, Zaar Hai \<[hai...@gmail.com](mailto:hai...@gmail.com) \ > > > > > wrote: > > > > > Hi, > > > > > > I've read > > > [Elasticsearch Platform — Find real-time answers at scale | Elastic](http://www.elasticsearch.org/guide/reference/mapping/id-field.html) and > > > have a followup question: > > > > > > Is that possible to construct document id from several fields? For > > > example, user's First and Last names? > > > > > > I've tried something like > > > { > > > "\_id" : { > > > "path" : ["first\_name", "last\_name"] > > > } > > > } > > > } > > > > > > But it falls back to default auto ID. > > > > > > -- > > > > -- > > > > -- -- ---
**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, 3:03am UTC](https://discuss.elastic.co/t/combined-document-id-combined-form-several-fields/9753/6 "2017-07-06T03:03:45Z")