How can I create previous version rails in rails 3?

Question

I've just upgraded my rails version to rails 3.0. But suddenly I need a new rails app with old version of rails. I know the new version of rails change command line usage with rails new. How can I create an old version of Rails in this new Rails 3 environment?

Answer 1

Use the following command:

rails _2.3.5_ new APP_NAME

This will create a rails project with version 2.3.5

Answer 2

Leonid Shevtsov provided instructions for how to do this here.

The easiest way to do it was:

1. Create the directory for the project

2. Create a Gemfile there containing

   gem "rails", "2.3.9"

   gem "sqlite3-ruby", :require => "sqlite3"

3. Runbundle install

4. Run bundle exec rails . to create an app in the current path

You don't even need rvm to do this.