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Chiron
Chiron

Reputation: 20245

Having multiple versions of Rails installed on OS X

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

Since Rails 3 is out, is it possible to have multiple versions of Rails (like 2.3.8 and 3) installed on OS X?
(For example, I could be working on two Rails projects, one is Rails 2.x and the other is Rails 3.x).

Upvotes: 3

Views: 4224

Answers (5)

jxpx777
jxpx777

Reputation: 3641

Use rvm

RVM is a command line tool which allows us to easily install, manage and work with multiple ruby environments from interpreters to sets of gems...

RVM allows users to deploy each project with its own completely self-contained and dedicated environment--from the specific version of ruby all the way down to the precise set of required gems to run the application. Having a precise set of gems also avoids the issue of version conflicts between projects, causing difficult-to-trace errors and hours of hair loss. With RVM, NO OTHER GEMS than those required are installed. This makes working with multiple complex applications where each has a long list of gem dependencies efficient. RVM allows us to easily test gem upgrades by switching to a new clean set of gems to test with while leaving our original set intact. It is flexible enough to even have a set of gems per environment or development branch--or even individual developer's taste...

Upvotes: 15

gunn
gunn

Reputation: 9165

I wouldn't bother with gemsets myself just do as other people have mentioned:

gem install -v=2.3.8 rails

and then to use:

rails _2.3.8_ new rails app

Note that this _versionnumber_ thing is a standard way of specifying a version of any rubygems installed executable.

Upvotes: 7

Wasabi Developer
Wasabi Developer

Reputation: 3553

Use

gem install -v=2.3.8 rails

where -v=[version number you want to install]

Then

list gem rails

In your config/environment.rb you can state which version of Rails you want to use.

Upvotes: 2

John Bachir
John Bachir

Reputation: 22751

To upgrade your OS version of the rails gem:

sudo gem install rails --version 2.3.8

While you're at it, you can also upgrade your OS rubygems system itself, overwriting the binary that OS X comes with. This might seem kind of hacky, but it's a stable thing that everyone does.

sudo gem install rubygems-update
sudo update_rubygems

Regarding managing rails versions in your projects, if your only needs are:

  1. Specifying the version of rails that you want on a rails project
  2. Specifying different versions of rails and/or other gems in each of multiple rails projects

Then rvm is overkill. The only thing you need, and what is also a complete and utter pleasure to work with, is Bundler. Bundler is like Software Update for your rails project. In fact, Rails 3 comes with Bundler by default, you just have to list the gems you need in Gemfile and it takes care of the rest. You don't need to worry about which versions of your gems are installed in the OS.

(You do however need the appropriate version of the rails gem installed in the OS in order to generate the rails project in the first place)

Upvotes: 1

Icid
Icid

Reputation: 1464

http://rubygems.org/

It's all you need =)

Upvotes: 0

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