# Logstash cycle in ruby filter

**URL:** <https://discuss.elastic.co/t/logstash-cycle-in-ruby-filter/279974>\
**Category:** Logstash\
**Created:** [July 29, 2021, 11:34am UTC](https://discuss.elastic.co/t/logstash-cycle-in-ruby-filter/279974 "2021-07-29T11:34:55Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![ThreatInter](https://avatars.discourse-cdn.com/v4/letter/t/49beb7/32.png) [@ThreatInter](https://discuss.elastic.co/u/ThreatInter)\
**Post date:** [July 29, 2021, 11:34am UTC](https://discuss.elastic.co/t/logstash-cycle-in-ruby-filter/279974/1 "2021-07-29T11:34:55Z")

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Hi, community. I have message in CEF format, that may have cs1...csn and cs1Label...csnLabel fields. I can't use CEF codec, because I want to keep my original message too. So I decided to use "for" loop in ruby filter and iterate over all this fields. But I don't know how to iterate over all this cs1...csn fields. Can someone help me?

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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:** [August 26, 2021, 11:34am UTC](https://discuss.elastic.co/t/logstash-cycle-in-ruby-filter/279974/2 "2021-08-26T11:34:59Z")

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