Rails Gem Bundler breaking Dependencies

Question

I recently installed the Bundle gem (stable 2.3.x) with a integrated 3.0 release. The documentation for installing 2.3.x is weak, so I'm looking for help here.

I've done everything from this article on installing and configuring gem bundler (Installing gem bundler, defining Gemfile, adding preinitializer.rb, requiring bundler_gems/environment.rb):

http://litanyagainstfear.com/blog/2009/10/14/gem-bundler-is-the-future/

I can run script/server successfully, but when I try to access any page via my browser, I get a 500 Internal Server Error claiming many ActionView methods are undefined:

ActionView::TemplateError (undefined method `debug' ...

ActionView::TemplateError (undefined method `javascript_tag' ... 

There has to be some gem dependency failing somewhere or something? Here's my Gemfile (rails 2.3.5):

clear_sources
bundle_path "vendor/bundler_gems"

source "http://gems.github.com"
source "http://gemcutter.org"

gem "rails", "2.3.5"
gem "formtastic"
gem "authlogic"
gem "will_paginate"
gem "cancan"

Any pointers?

Answer 1

So for configuring gem bundler on Rails 2.3.5:

I changed my preinitializer.rb script to this:

# Load the environment constructed from the Gemfile
require "#{File.dirname(__FILE__)}/../vendor/bundler_gems/environment"

module Rails
  class Boot
    def run
      load_initializer
      extend_environment
      Rails::Initializer.run(:set_load_path)
    end

    def extend_environment
      Rails::Initializer.class_eval do
        old_load = instance_method(:load_gems)
        define_method(:load_gems) do
          old_load.bind(self).call
          Bundler.require_env RAILS_ENV
        end
      end
    end
  end
end

And removed any Bundler.require_env definitions from config/environment.rb, and all was good.

http://gist.github.com/286099

Answer 2

Most (or all) of these gems are Rails plugins. You should require them during Rails initialization phase. Stick this in your after_initialize:

config.after_initialize do
  Bundler.require_env
end

Answer 3

For reference, bundle is now on 0.9.5. Here is the newest rails 2.3.5 config (you can basically ignore everything else here):

http://gist.github.com/302406

Answer 4

Updated as Gem Bundler Documentation improves:

http://gembundler.com/rails23.html