Start Rails 3 server with Rails 2

Question

I have a Rails 3 project, and I have a computer with Rails 2 installed. Is there any way for me to start the server on that computer? I cannot update the computer to Rails 3 for various reasons.

If you have bundler, then run `bundle install --path vendor/bundle` and `bundle exec rails s` — siddick, Jun 04 '13 at 10:31
Could you install additional versions? There are ways (like rvm) to run them parallel. — thorsten müller, Jun 04 '13 at 10:39
No I cant really change anything except the project itself, I dont have admin rights — Topsic, Jun 04 '13 at 13:43

score 2 · Accepted Answer · answered Jun 04 '13 at 10:48

2

You don't need to 'update the computer to rails 3', you can install multiple versions of rails concurrently and define which versions to use in each project.

In Rails 2 projects the rails version is defined by RAILS_GEM_VERSION in environment.rb
In Rails 3 projects the rails version is defined by gem 'rails', '3.x.x' in the gemfile

If you also need multiple ruby versions:

If on linux have a look at RVM
if on windows have a look at pik

answered Jun 04 '13 at 10:48

Matt

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I see, but I dont admin rights on this computer so I cant really change anything on the computer, only the project itself – Topsic Jun 04 '13 at 13:42
You'll just run into error after error if you run the rails 3 project against rails 2 (by changing the rails version number in the gemfile), but see [this question](http://stackoverflow.com/questions/11886921/downgrading-a-rails-3-app-to-rails-2) for some downgrade guidance. – Matt Jun 04 '13 at 13:47

Start Rails 3 server with Rails 2

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