Having multiple versions of Rails installed on OS X

Question

OS X 10.6 by default installed Rails 2.2.2. How to upgrade to Rails 2.3.8?

Since Rails 3 is missing, is it possible to install multiple versions of Rails (e.g. 2.3.8 and 3) on OS X?
(For example, I could work on two Rails projects, one of them is Rails 2.x and the other is Rails 3.x).

Answer 1

Use rvm

RVM is a command line tool that allows us to easily install, manage and work with several ruby ​​environments from interpreters to gem sets ...

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Answer 2

, , :

gem install -v=2.3.8 rails

:

rails _2.3.8_ new rails app

, _versionnumber_ rubygems.

Answer 3

gem install -v=2.3.8 rails

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list gem rails

config/environment.rb Rails, .

Answer 4

gem:

sudo gem install rails --version 2.3.8

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sudo gem install rubygems-update
sudo update_rubygems

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Answer 5

http://rubygems.org/

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