# Ruby filter

**URL:** <https://discuss.elastic.co/t/ruby-filter/54313>\
**Category:** Logstash\
**Created:** [June 29, 2016, 4:16pm UTC](https://discuss.elastic.co/t/ruby-filter/54313 "2016-06-29T16:16:01Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![DMJ](https://avatars.discourse-cdn.com/v4/letter/d/ce7236/32.png) [@DMJ](https://discuss.elastic.co/u/DMJ)\
**Post date:** [June 29, 2016, 4:16pm UTC](https://discuss.elastic.co/t/ruby-filter/54313/1 "2016-06-29T16:16:01Z")

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Is it possible to assign a class variable to an event field using ruby ?

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**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, 4:50am UTC](https://discuss.elastic.co/t/ruby-filter/54313/2 "2017-07-06T04:50:22Z")

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