bundle install error activeadmin ransack - ruby-on-rails

Question

Am trying to install my own project onto a secondary computer - both are macosx 10.8.4, both setup using macports and RVM.
For some reason as I'm trying to bundle install I'm getting this error:
```
Bundler could not find compatible versions for gem "ransack":
In Gemfile:
activeadmin (>= 0) ruby depends on
ransack (>= 1.0.0) ruby
ransack (0.7.3)
Bundler could not find compatible versions for gem "actionpack":
In Gemfile:
ransack (>= 0) ruby depends on
actionpack (>= 4.0.0) ruby
sass-rails (~> 4.0.0) ruby depends on
actionpack (4.0.0.beta1)
```
Not sure why bundle install works fine on one computer and not the other; I recently participated in this ransack issue on with activeadmin on github and it seemed to be fixed; unsure why it's popping up again.
UPDATE: gem file:
source 'https://rubygems.org'
# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
gem 'rails', '~> 4.0.0'
# Use sqlite3 as the database for Active Record
gem 'sqlite3'
# Use SCSS for stylesheets
gem 'sass-rails', '~> 4.0.0'
# Use Uglifier as compressor for JavaScript assets
gem 'uglifier', '>= 1.3.0'
# Use CoffeeScript for .js.coffee assets and views
gem 'coffee-rails', '~> 4.0.0'
# See https://github.com/sstephenson/execjs#readme for more supported runtimes
# gem 'therubyracer', platforms: :ruby
# Use jquery as the JavaScript library
gem 'jquery-rails'
# Turbolinks makes following links in your web application faster. Read more: https://github.com/rails/turbolinks
gem 'turbolinks'
# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
gem 'jbuilder', '~> 1.2'
gem 'ZenTest'
# Add Foundation Here
#gem 'compass-rails' # you need this or you get an err
# gem 'compass-rails', github: 'milgner/compass-rails', branch: 'rails4'
# gem 'zurb-foundation', '~> 4.0.0'
gem 'paperclip', '>= 3.4.0' # image upload
gem 'aws-sdk'
# gem 'bootstrap-sass', '~> 2.3.2.1'
gem 'anjlab-bootstrap-rails', :require => 'bootstrap-rails',
:github => 'anjlab/bootstrap-rails',
:branch => '3.0.0'
gem 'devise', github: 'plataformatec/devise'
gem 'devise_security_extension', :github => 'phatworx/devise_security_extension' # security questions
# administration
gem 'activeadmin', github: 'gregbell/active_admin', branch: 'rails4'
gem 'ransack', github: 'ernie/ransack', branch: 'rails-4'
gem 'inherited_resources', github: 'josevalim/inherited_resources'
gem 'formtastic', github: 'justinfrench/formtastic'
gem "rich", github: 'bastiaanterhorst/rich'
# gem 'active_admin_editor'
gem 'survey', :git => 'git://github.com/runtimerevolution/survey.git'
# voting
# gem 'acts_as_votable', github: 'ryanto/acts_as_votable'
gem "acts_as_votable", "~> 0.7.1"
gem 'friendly_id', '5.0.0.beta4' # Note: You MUST use 5.0.0 or greater for Rails 4.0+
group :doc do
# bundle exec rake doc:rails generates the API under doc/api.
gem 'sdoc', require: false
end
# Use ActiveModel has_secure_password
# gem 'bcrypt-ruby', '~> 3.0.0'
# Use unicorn as the app server
# gem 'unicorn'
# Use Capistrano for deployment
# gem 'capistrano', group: :development
# Use debugger
# gem 'debugger', group: [:development, :test]
group :development do
gem 'better_errors'
gem 'binding_of_caller'
gem 'meta_request'
gem 'rspec-rails'
gem 'spork'
gem 'spork-rails', :github => 'sporkrb/spork-rails'
gem 'annotate'
end
group :test do
gem 'rspec'
gem 'autotest'
gem 'autotest-growl'
gem 'autotest-fsevent'
end

Answer 1

I think you don't want to use the rails-4 branch of ransack. It looks like the current master version supports Rails 4.
The dependency on the rails4 branch of activeadmin says that it needs ransack >= 1.0.0, but the version of ransack on the rails-4 branch is 0.7.3.
It is probably a better idea to use the released versions of gems from Rubygems unless you need specific unreleased fixes in the Git repo.