Create new Rails project with previous rails version

Question

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 here codename30.com/2010/02/22/… - ps. this appears to be a known issue although the bug has not yet been assigned rails.lighthouseapp.com/projects/8994/tickets/… — stephenmurdoch

Toby Hede Toby Hede · Accepted Answer · 2010-03-14T23:00:42

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.

Create new Rails project with previous rails version

2 Answers