# Rails 2.1, version\_fu, ActAsVersioned and =\> "undefined method \`find\_version"

**URL:** <https://www.ruby-forum.com/t/rails-2-1-version-fu-actasversioned-and-undefined-method-find-version/151522>\
**Category:** Rails\
**Created:** [October 22, 2008, 11:49am UTC](https://www.ruby-forum.com/t/rails-2-1-version-fu-actasversioned-and-undefined-method-find-version/151522 "2008-10-22T11:49:45Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![casper\_the\_ghost](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/58956e/32.png) [@casper\_the\_ghost](https://www.ruby-forum.com/u/casper_the_ghost)\
**Post date:** [October 22, 2008, 11:49am UTC](https://www.ruby-forum.com/t/rails-2-1-version-fu-actasversioned-and-undefined-method-find-version/151522/1 "2008-10-22T11:49:45Z")

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I’ve updated and old app to Rails 2.1, and now I can’t get  
ActAsVersioned to work anymore. I’ve updated to last version who is  
updated for Rails 2.1, and also tried VerdsionFU but both give me  
error message “undefined method `find\_version” when I tries to role  
back to an old version.

Can it be that I’ve not updated anything in my tables which causes  
this?

— Model:  
class Article \< ActiveRecord::Base

# acts\_as\_versioned

version\_fu

— Controller:  
class ArticlesController \< ApplicationController  
…  
@article = Article.find\_version(params[:id], params[:versjon])

(Btw. Anybody who have any recommendations according if I should use  
ActAsVersioned or switch to VersionFU? What is the difference?).

- Henrik

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<div class="post-metadata">

**Author:** ![casper\_the\_ghost](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/58956e/32.png) [@casper\_the\_ghost](https://www.ruby-forum.com/u/casper_the_ghost)\
**Post date:** [October 22, 2008, 2:04pm UTC](https://www.ruby-forum.com/t/rails-2-1-version-fu-actasversioned-and-undefined-method-find-version/151522/2 "2008-10-22T14:04:10Z")

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Ahh. Now I saw that I find\_version was removed from the pluggin…

- Henrik