# Collection\_select

**URL:** <https://www.ruby-forum.com/t/collection-select/145585>\
**Category:** Rails\
**Created:** [August 11, 2008, 8:19pm UTC](https://www.ruby-forum.com/t/collection-select/145585 "2008-08-11T20:19:24Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![jturney](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/e99b99/32.png) [@jturney](https://www.ruby-forum.com/u/jturney)\
**Post date:** [August 11, 2008, 8:19pm UTC](https://www.ruby-forum.com/t/collection-select/145585/1 "2008-08-11T20:19:24Z")

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Hi, quick question:

\<%= collection\_select(:category, :id, @categories, :id, :name, options  
={}, :multiple=\>“multiple” %\>

1. How can I use params to pre-select multiple items?

Thanks