# Validate\_presence\_of radio button selected?

**URL:** <https://www.ruby-forum.com/t/validate-presence-of-radio-button-selected/118386>\
**Category:** Rails\
**Created:** [October 26, 2007, 12:44pm UTC](https://www.ruby-forum.com/t/validate-presence-of-radio-button-selected/118386 "2007-10-26T12:44:29Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![mgiorno](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/e274bd/32.png) [@mgiorno](https://www.ruby-forum.com/u/mgiorno)\
**Post date:** [October 26, 2007, 12:44pm UTC](https://www.ruby-forum.com/t/validate-presence-of-radio-button-selected/118386/1 "2007-10-26T12:44:29Z")

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Hi,

I’m trying to force a user to pick one of several options, but  
validate\_presence\_of doesn’t seem to work on my radio buttons. Has  
anyone else had this problem?

##Model  
validates\_presence\_of :category\_id

##View

\<% category\_list.each do |cat| %\>  
\<%= radio\_button (:video, :category\_id, cat.id) %\>  
  
\<%= cat.name %\>  
  
  
  
\<% end %\>