How to use bundler (0.9.1.pre1) with Rails and CouchRest

Question

I want to use the current version of bundler (there have been quite some changes from 0.8 to 0.9) to mange the gems of my Rails app. First I created a Gemfile in the root of the app folder and added all the needed gems to it. Then I placed (as recommended in the manual) the following code to my config/environment.rb:

begin
  # Require the preresolved locked set of gems.
  require File.expand_path('../.bundle/environment', __FILE__)
rescue LoadError
  # Fallback on doing the resolve at runtime.
  require "rubygems"
  require "bundler"
  Bundler.setup
end

bundle install seems to work fine as it finished with Your bundle is complete!. But when starting my app I get the following error:

$ ruby script/server  
=> Booting WEBrick
=> Rails 2.3.5 application starting on http://0.0.0.0:3000
/usr/local/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:443:in `load_missing_constant': uninitialized constant CouchRest (NameError)
        from /usr/local/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:80:in `const_missing'
        from /usr/local/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:92:in `const_missing'
        from /home/kuf/data/Arbeit/Decodon/2009-05-08-Project_Orange/orangemix/fuse/config/initializers/couchdb.rb:35
        from /usr/local/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:145:in `load_without_new_constant_marking'
        from /usr/local/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:145:in `load'
        from /usr/local/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:521:in `new_constants_in'
        from /usr/local/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:145:in `load'
        from /usr/local/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/initializer.rb:622:in `load_application_initializers'
         ... 11 levels...
        from /usr/local/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/commands/server.rb:84
        from /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
        from /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'
        from script/server:3

What is wrong here?

Answer 1

Arrrg, just pushed the send button and had an idea that solved the problem. The bundler manual says: "[...] include the following at the beginning of your code." For a Rails app you have to put the mentioned part at the bottom of config/environment.rb to get everything setup correctly before:

RAILS_GEM_VERSION = '2.3.5' unless defined? RAILS_GEM_VERSION

require File.join(File.dirname(__FILE__), 'boot')

Rails::Initializer.run do |config|
...
end

# Put the bundler related stuff here!
begin
  # Require the preresolved locked set of gems.
  require File.expand_path('../.bundle/environment', __FILE__)
rescue LoadError
  # Fallback on doing the resolve at runtime.
  require "rubygems"
  require "bundler"
  Bundler.setup
end