# How to add validation in select tag

**URL:** <https://www.ruby-forum.com/t/how-to-add-validation-in-select-tag/167747>\
**Category:** Rails\
**Created:** [May 12, 2009, 8:00am UTC](https://www.ruby-forum.com/t/how-to-add-validation-in-select-tag/167747 "2009-05-12T08:00:31Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![nishi](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/ad7895/32.png) [@nishi](https://www.ruby-forum.com/u/nishi)\
**Post date:** [May 12, 2009, 8:00am UTC](https://www.ruby-forum.com/t/how-to-add-validation-in-select-tag/167747/1 "2009-05-12T08:00:31Z")

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Hi,

Im trying to validate the select\_tag i.e must be selected 3 items from  
the list.  
If anyone know that,please give sm idea.