# \_rubyexception when accessing ‘event’ array in ruby code

**URL:** <https://discuss.elastic.co/t/-rubyexception-when-accessing-event-array-in-ruby-code/57553>\
**Category:** Logstash\
**Created:** [August 9, 2016, 6:12am UTC](https://discuss.elastic.co/t/-rubyexception-when-accessing-event-array-in-ruby-code/57553 "2016-08-09T06:12:25Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![k007](https://avatars.discourse-cdn.com/v4/letter/k/df705f/32.png) [@k007](https://discuss.elastic.co/u/k007)\
**Post date:** [August 9, 2016, 6:12am UTC](https://discuss.elastic.co/t/-rubyexception-when-accessing-event-array-in-ruby-code/57553/1 "2016-08-09T06:12:25Z")

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Hello ,

I am trying to use below code in logstash 5 but getting \_rubyexception.

code =\> "event['dest-field'] = event['message'][0..1]"

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**Author:** ![magnusbaeck](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/magnusbaeck/32/44943_2.png) [@magnusbaeck](https://discuss.elastic.co/u/magnusbaeck)\
**Post date:** [August 9, 2016, 8:45am UTC](https://discuss.elastic.co/t/-rubyexception-when-accessing-event-array-in-ruby-code/57553/2 "2016-08-09T08:45:08Z")

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See [\_rubyexception when accessing 'event' array in ruby code](https://discuss.elastic.co/t/-rubyexception-when-accessing-event-array-in-ruby-code/57071).

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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, 4:44am UTC](https://discuss.elastic.co/t/-rubyexception-when-accessing-event-array-in-ruby-code/57553/3 "2017-07-06T04:44:15Z")

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