# Field name cannot contain '.'

**URL:** <https://discuss.elastic.co/t/field-name-cannot-contain/33251>\
**Category:** Logstash\
**Created:** [October 29, 2015, 2:05pm UTC](https://discuss.elastic.co/t/field-name-cannot-contain/33251 "2015-10-29T14:05:04Z")\
**Posts on this page:** 1\
**Showing post:** 13

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**Author:** ![juerkan](https://avatars.discourse-cdn.com/v4/letter/j/4491bb/32.png) [@juerkan](https://discuss.elastic.co/u/juerkan)\
**Post date:** [November 4, 2015, 7:19pm UTC](https://discuss.elastic.co/t/field-name-cannot-contain/33251/13 "2015-11-04T19:19:47Z")

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Hi,  
Thank you very much, it works.  
Just a little issue with more then one dot in a field -\> the ruby code replace just the first dot in a fieldname.  
But that is not really a problem, because i insert the ruby filter twice.

many thanks  
juergen

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