# Create alias using filter to exclude certain value

**URL:** <https://discuss.elastic.co/t/create-alias-using-filter-to-exclude-certain-value/123126>\
**Category:** Elasticsearch\
**Created:** [March 8, 2018, 5:45pm UTC](https://discuss.elastic.co/t/create-alias-using-filter-to-exclude-certain-value/123126 "2018-03-08T17:45:15Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![reswob](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/reswob/32/38015_2.png) [@reswob](https://discuss.elastic.co/u/reswob)\
**Post date:** [March 8, 2018, 5:45pm UTC](https://discuss.elastic.co/t/create-alias-using-filter-to-exclude-certain-value/123126/1 "2018-03-08T17:45:15Z")

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According to [Aliases API | Elasticsearch Guide [8.11] | Elastic](https://www.elastic.co/guide/en/elasticsearch/reference/current/indices-aliases.html#filtered), I can create an alias for certain events in an index, like all events with a certain tag. I would like to create an alias for all events in an index WITHOUT that tag. I'm having trouble finding the exact syntax for to do that.

> POST /\_aliases  
> {  
> "actions" : [  
> {  
> "add" : {  
> "index" : "test1",  
> "alias" : "alias2",  
> "filter" : { "term" : { "user" : "kimchy" } }  
> }  
> }  
> ]  
> }

Should it be "filter": {"not": { "term" : { "user" : "kimchy" } } } ?

Thanks

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<div class="post-metadata">

**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\
**Post date:** [March 8, 2018, 8:31pm UTC](https://discuss.elastic.co/t/create-alias-using-filter-to-exclude-certain-value/123126/2 "2018-03-08T20:31:55Z")

</div>

Use a `bool` query with a `must_not` clause.

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<div class="post-metadata">

**Author:** ![reswob](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/reswob/32/38015_2.png) [@reswob](https://discuss.elastic.co/u/reswob)\
**Post date:** [April 3, 2018, 1:31pm UTC](https://discuss.elastic.co/t/create-alias-using-filter-to-exclude-certain-value/123126/3 "2018-04-03T13:31:20Z")

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This worked.

Sorry for the delay in response, I finally got to test this answer.

More details and syntax here: [https://www.elastic.co/guide/en/elasticsearch/reference/current/indices-aliases.html#filtered](https://www.elastic.co/guide/en/elasticsearch/reference/current/indices-aliases.html#filtered)

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [May 1, 2018, 1:31pm UTC](https://discuss.elastic.co/t/create-alias-using-filter-to-exclude-certain-value/123126/4 "2018-05-01T13:31:41Z")

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