Create new Rails project with previous rails version

Question

Hello,

The latest version of rails installed on my mac is 3.0.0.beta

gem list returns rails (3.0.0.beta, 2.3.5, 2.3.4, 2.3.2, 2.2.2, 1.2.6)

I want to create a new project using version 2.3.5

So I run: rails _2.3.5_ myProject

But it returns the following error

$ rails _2.3.5_ photosbackup
/Library/Ruby/Site/1.8/rubygems.rb:777:in `report_activate_error': RubyGem version error: railties(3.0.0.beta not = 2.3.5) (Gem::LoadError)
    from /Library/Ruby/Site/1.8/rubygems.rb:211:in `activate'
    from /Library/Ruby/Site/1.8/rubygems.rb:1056:in `gem'
    from /usr/bin/rails:18

Any idea how I can create a new project using version 2.3.5?

Thanks

Answer 1

I think you can just uninstall the previous Rails versions.

Which can be problematic - I have a number of Rails 2.3.5 (and earlier) apps in production that require maintenance and won't be upgraded to the new version.

So what I recommend in this situation is having a look at RVM - it lets you install and manage multiple versions of Ruby, and provides isolation between sets of Gems. I now run a Ruby 1.9.1 with Rails 3 and friends in isolation from my default system settings which let me do my day to day work.