# Generating rails app in previous version after rails 3.0 ins **URL:** \ **Category:** Rails\ **Created:** [February 10, 2010, 11:07am UTC](https://www.ruby-forum.com/t/generating-rails-app-in-previous-version-after-rails-3-0-ins/183235 "2010-02-10T11:07:14Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![jmcervera](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/51bf81/32.png) [@jmcervera](https://www.ruby-forum.com/u/jmcervera)\ **Post date:** [February 10, 2010, 11:07am UTC](https://www.ruby-forum.com/t/generating-rails-app-in-previous-version-after-rails-3-0-ins/183235/1 "2010-02-10T11:07:14Z")
Hello Anybody knows how to generate a rails application in a previous version, after the installation of Rails 3.0.0.beta gem. This would work before, rails _2.3.5_ my\_app but fails now with … /usr/local/lib/site\_ruby/1.8/rubygems.rb:827:in `report_activate_error': RubyGem version error: railties(3.0.0.beta not = 2.3.5) (Gem::LoadError) from /usr/local/lib/site_ruby/1.8/rubygems.rb:261:in`activate’ from /usr/local/lib/site\_ruby/1.8/rubygems.rb:68:in `gem’ from /usr/bin/rails:18 There sghould be a way to do this. Thanks Juanma C. ---
**Author:** ![jmcervera](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/51bf81/32.png) [@jmcervera](https://www.ruby-forum.com/u/jmcervera)\ **Post date:** [February 10, 2010, 1:41pm UTC](https://www.ruby-forum.com/t/generating-rails-app-in-previous-version-after-rails-3-0-ins/183235/2 "2010-02-10T13:41:55Z")
On Wed, Feb 10, 2010 at 2:07 AM, Juanma C. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)wrote: > /usr/local/lib/site\_ruby/1.8/rubygems.rb:827:in `report_activate_error': RubyGem version error: railties(3.0.0.beta not = 2.3.5) (Gem::LoadError) from /usr/local/lib/site_ruby/1.8/rubygems.rb:261:in `activate’ > from /usr/local/lib/site\_ruby/1.8/rubygems.rb:68:in `gem’ > from /usr/bin/rails:18 > > There sghould be a way to do this. > > Thanks > Juanma C. If you’re using Mac OS, then you can install Rails 2.3.5 on a different Ruby VM. For example, I’m using Ruby 1.9.2 with Rails 3.0 Beta and Ruby 1.8.7/1.9.1 are using Rails 2.3.5. Good luck, -Conrad ---
**Author:** ![jmcervera](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/51bf81/32.png) [@jmcervera](https://www.ruby-forum.com/u/jmcervera)\ **Post date:** [February 10, 2010, 3:09pm UTC](https://www.ruby-forum.com/t/generating-rails-app-in-previous-version-after-rails-3-0-ins/183235/3 "2010-02-10T15:09:17Z")
Conrad T. wrote: > On Wed, Feb 10, 2010 at 2:07 AM, Juanma C. > [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)wrote: > > > /usr/local/lib/site\_ruby/1.8/rubygems.rb:827:in `report_activate_error': RubyGem version error: railties(3.0.0.beta not = 2.3.5) (Gem::LoadError) from /usr/local/lib/site_ruby/1.8/rubygems.rb:261:in `activate’ > > from /usr/local/lib/site\_ruby/1.8/rubygems.rb:68:in `gem’ > > from /usr/bin/rails:18 > > > > There sghould be a way to do this. > > > > Thanks > > Juanma C. > > If you’re using Mac OS, then you can install Rails 2.3.5 on a different > Ruby > VM. > For example, I’m using Ruby 1.9.2 with Rails 3.0 Beta and Ruby > 1.8.7/1.9.1 > are > using Rails 2.3.5. What a clumsy workaround. There’s gotta be a better way. > Good luck, > > -Conrad Best, –Â Marnen Laibow-Koser [http://www.marnen.org](http://www.marnen.org) removed\_email\_address@domain.invalid ---
**Author:** ![jmcervera](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/51bf81/32.png) [@jmcervera](https://www.ruby-forum.com/u/jmcervera)\ **Post date:** [February 10, 2010, 3:32pm UTC](https://www.ruby-forum.com/t/generating-rails-app-in-previous-version-after-rails-3-0-ins/183235/4 "2010-02-10T15:32:32Z")
On Wed, Feb 10, 2010 at 6:09 AM, Marnen Laibow-Koser [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)wrote: > > > There sghould be a way to do this. > > > are > > > using Rails 2.3.5. > > What a clumsy workaround. There’s gotta be a better way. Yes, it’s clumsy but it works. My boss wanted this earlier because there was no built in way to target the rails command to generate a 2.3.x application. One really wants to do the following: rails -v=2.3.5 -d mysql application\_name or something similar. I’ll initiate an enhancement request and see what the Rails core team think about this. -Conrad