I’ve had some problems with the new bundle install in rails 3. Specifically, on my laptop, in the development environment, I use sqlite. But in production, I use mysql. I was getting all sorts of errors on my laptop about the mysql gem not working and on the production server the errors were about a problem with the sqlite gem. Ideally, I wanted the development server to ignore mysql and the production server to ignore sqlite. Here’s how it was done.

Gemfile:

source 'http://rubygems.org'

gem 'rails', '3.0.0'

gem 'authlogic', :git => 'git://github.com/odorcicd/authlogic.git', :branch => 'rails3'
gem 'declarative_authorization'
gem 'rmagick', :require => 'RMagick'

group :development do
	gem 'sqlite3-ruby', :require => 'sqlite3'
end

group :production do
	gem 'mysql', '2.8.1'
end

On laptop,

$ sudo bundle install --without production test
Fetching source index for http://rubygems.org/
Using rake (0.8.7) 
Using abstract (1.0.0) 
Using activesupport (3.0.0) 
Using builder (2.1.2) 
Using i18n (0.4.1) 
Using activemodel (3.0.0) 
Using erubis (2.6.6) 
Using rack (1.2.1) 
Using rack-mount (0.6.13) 
Using rack-test (0.5.4) 
Using tzinfo (0.3.23) 
Using actionpack (3.0.0) 
Using mime-types (1.16) 
Using polyglot (0.3.1) 
Using treetop (1.4.8) 
Using mail (2.2.5) 
Using actionmailer (3.0.0) 
Using arel (1.0.1) 
Using activerecord (3.0.0) 
Using activeresource (3.0.0) 
Using authlogic (2.1.3) from git://github.com/odorcicd/authlogic.git (at rails3) 
Using bundler (1.0.0) 
Using thor (0.14.0) 
Using railties (3.0.0) 
Using rails (3.0.0) 
Using declarative_authorization (0.5) 
Using rmagick (2.13.1) 
Using sqlite3-ruby (1.3.1) 
Your bundle is complete! Use `bundle show [gemname]` to see where a bundled gem is installed.

And on my production server.

# sudo bundle install --without development test
Using rake (0.8.7) 
Using abstract (1.0.0) 
Using activesupport (3.0.0) 
Using builder (2.1.2) 
Using i18n (0.4.1) 
Using activemodel (3.0.0) 
Using erubis (2.6.6) 
Using rack (1.2.1) 
Using rack-mount (0.6.13) 
Using rack-test (0.5.4) 
Using tzinfo (0.3.23) 
Using actionpack (3.0.0) 
Using mime-types (1.16) 
Using polyglot (0.3.1) 
Using treetop (1.4.8) 
Using mail (2.2.5) 
Using actionmailer (3.0.0) 
Using arel (1.0.1) 
Using activerecord (3.0.0) 
Using activeresource (3.0.0) 
Using authlogic (2.1.3) from git://github.com/odorcicd/authlogic.git (at rails3) 
Using bundler (1.0.0) 
Using thor (0.14.0) 
Using railties (3.0.0) 
Using rails (3.0.0) 
Using declarative_authorization (0.5) 
Using mysql (2.8.1) 
Using rmagick (2.13.1) 
Your bundle is complete! Use `bundle show [gemname]` to see where a bundled gem is installed.

Working as it should.