# Hash tag field analyzer not being applied **URL:** \ **Category:** Elasticsearch\ **Created:** [June 24, 2014, 5:50pm UTC](https://discuss.elastic.co/t/hash-tag-field-analyzer-not-being-applied/18304 "2014-06-24T17:50:52Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Andre\_Morais](https://avatars.discourse-cdn.com/v4/letter/a/57b2e6/32.png) [@Andre\_Morais](https://discuss.elastic.co/u/Andre_Morais)\ **Post date:** [June 24, 2014, 5:50pm UTC](https://discuss.elastic.co/t/hash-tag-field-analyzer-not-being-applied/18304/1 "2014-06-24T17:50:52Z")
Hello! ``` I have configured an analyzer in my YML to exclude all words that do ``` not start with either # or @ to process hash tags and at tags. This analyzer works fine if using the analyzer API but when I index data it is not being applied. ``` I thought that when indexing, analyzers would replace the original ``` contents with the analysis result. Is that not so? ``` Thank you for your help! André ``` * * * ``` Here is my YML configuration: ``` index.analysis.analyzer.tags: type: custom tokenizer: whitespace filter: fntags, fnsize index.analysis.filter.fntags: type : pattern\_replace pattern: "^[^#@]+.\*$" replacement: "" index.analysis.filter.fnsize: type : length min : 2 max : 200 Here is my type mapping for the field: Hash\_Tags: { analyzer: tags type: string } Here is the result when using the analyzer API: curl -XGET 'localhost:9200/catalog/\_analyze?field=Hash\_Tags&pretty=true' -d 'NO a la violencia! Comparta esto en la medida de lo posible si espera verdaderamente un mejor mundo para Navidad... y despus! #lifeworthbetter' { "tokens" : [ { "token" : "#lifeworthbetter", "start\_offset" : 126, "end\_offset" : 142, "type" : "word", "position" : 23 } ] } And here the result for a match\_all query: Hash\_Tags: " NO a la violencia! Comparta esto en la medida de lo posible si espera verdaderamente un mejor mundo para Navidad... y después! #lifeworthbetter" I was expecting: Hash\_Tags: "#lifeworthbetter" -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/b719f38f-c8a0-439f-9cdc-0bf3f709429d%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/b719f38f-c8a0-439f-9cdc-0bf3f709429d%40googlegroups.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---
**Author:** ![Andre\_Morais](https://avatars.discourse-cdn.com/v4/letter/a/57b2e6/32.png) [@Andre\_Morais](https://discuss.elastic.co/u/Andre_Morais)\ **Post date:** [June 25, 2014, 9:42am UTC](https://discuss.elastic.co/t/hash-tag-field-analyzer-not-being-applied/18304/2 "2014-06-25T09:42:33Z")
Figured it out... Analyzer is correct but, contrary to what I thought, all the data I put in the index is stored there and the analyzer is only applied when indexing or querying it. So, retrieving my hashtag field data should return all the data I put there and not merely the tokens resulting from data analysis with my analyzer. ``` Thanks anyway! ``` Terça-feira, 24 de Junho de 2014 18:50:53 UTC+1, André Morais escreveu: > Hello! > > ``` > I have configured an analyzer in my YML to exclude all words that do > > ``` > > not start with either # or @ to process hash tags and at tags. This > analyzer works fine if using the analyzer API but when I index data it is > not being applied. > > ``` > I thought that when indexing, analyzers would replace the original > > ``` > > contents with the analysis result. Is that not so? > > ``` > Thank you for your help! > > André > > ``` > > * * * > > ``` > Here is my YML configuration: > > ``` > > index.analysis.analyzer.tags: > type: custom > tokenizer: whitespace > filter: fntags, fnsize > index.analysis.filter.fntags: > type : pattern\_replace > pattern: "\[1\]+.\*$" > replacement: "" > index.analysis.filter.fnsize: > type : length > min : 2 > max : 200 > > Here is my type mapping for the field: > > Hash\_Tags: { > analyzer: tags > type: string > } > > Here is the result when using the analyzer API: > > curl -XGET 'localhost:9200/catalog/\_analyze?field=Hash\_Tags&pretty=true' > -d 'NO a la violencia! Comparta esto en la medida de lo posible si espera > verdaderamente un mejor mundo para Navidad... y despus! #lifeworthbetter' > { > "tokens" : [ { > "token" : "#lifeworthbetter", > "start\_offset" : 126, > "end\_offset" : 142, > "type" : "word", > "position" : 23 > } ] > } > > And here the result for a match\_all query: > > Hash\_Tags: " NO a la violencia! Comparta esto en la medida de lo posible > si espera verdaderamente un mejor mundo para Navidad... y después! > #lifeworthbetter" > > I was expecting: > Hash\_Tags: "#lifeworthbetter" -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/e3330517-750e-4895-bc8a-6cef8249c89d%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/e3330517-750e-4895-bc8a-6cef8249c89d%40googlegroups.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). * * * 1. ^#@ ---
**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, 1:19am UTC](https://discuss.elastic.co/t/hash-tag-field-analyzer-not-being-applied/18304/3 "2017-07-06T01:19:54Z")