undefined method `environment' for nil:NilClass when importing Bootstrap

Question

I've been trying to import Bootstrap into my rails app and I'm not quite sure what's going wrong. I've had it working before, but I did a 'bundle update' and destroyed some dependencies (I think). I've seemingly fixed everything... except for Bootstrap.

I've tried removing and re-entering the 'bootstrap-sass' gem... I can't really figure out where the error is.

Thanks for the help!

Gemfile

source 'https://rubygems.org' ruby '2.0.0'  gem 'rails', '4.0.1' gem 'bootstrap-sass' gem 'bcrypt-ruby', '3.1.2' gem 'faker', '1.1.2'  group :development, :test do    gem 'sqlite3', '1.3.8'   gem 'rspec-rails' end  group :test do   gem 'selenium-webdriver', '2.35.1'   gem 'capybara', '2.1.0'   gem 'factory_girl_rails', '4.2.1'   gem 'database_cleaner', github: 'bmabey/database_cleaner' end  gem 'sass-rails' gem 'uglifier', '2.1.1' gem 'coffee-rails', '4.0.1' gem 'jquery-rails', '3.0.4' gem 'turbolinks', '1.1.1' gem 'jbuilder', '1.0.2'  group :doc do   gem 'sdoc', '0.3.20', require: false end  group :production do   gem 'pg', '0.15.1'   gem 'rails_12factor', '0.0.2' end 

Gemfile.lock

GIT   remote: git://github.com/bmabey/database_cleaner.git   revision: 35bd646903fc56af185a9fa9e360c568bb56756e   specs:     database_cleaner (1.2.0)  GEM   remote: https://rubygems.org/   specs:     actionmailer (4.0.1)       actionpack (= 4.0.1)       mail (~> 2.5.4)     actionpack (4.0.1)       activesupport (= 4.0.1)       builder (~> 3.1.0)       erubis (~> 2.7.0)       rack (~> 1.5.2)       rack-test (~> 0.6.2)     activemodel (4.0.1)       activesupport (= 4.0.1)       builder (~> 3.1.0)     activerecord (4.0.1)       activemodel (= 4.0.1)       activerecord-deprecated_finders (~> 1.0.2)       activesupport (= 4.0.1)       arel (~> 4.0.0)     activerecord-deprecated_finders (1.0.3)     activesupport (4.0.1)       i18n (~> 0.6, >= 0.6.4)       minitest (~> 4.2)       multi_json (~> 1.3)       thread_safe (~> 0.1)       tzinfo (~> 0.3.37)     arel (4.0.2)     atomic (1.1.15)     bcrypt-ruby (3.1.2)     bootstrap-sass (3.1.1.0)       sass (~> 3.2)     builder (3.1.4)     capybara (2.1.0)       mime-types (>= 1.16)       nokogiri (>= 1.3.3)       rack (>= 1.0.0)       rack-test (>= 0.5.4)       xpath (~> 2.0)     childprocess (0.5.1)       ffi (~> 1.0, >= 1.0.11)     coffee-rails (4.0.1)       coffee-script (>= 2.2.0)       railties (>= 4.0.0, < 5.0)     coffee-script (2.2.0)       coffee-script-source       execjs     coffee-script-source (1.7.0)     diff-lcs (1.2.5)     erubis (2.7.0)     execjs (2.0.2)     factory_girl (4.2.0)       activesupport (>= 3.0.0)     factory_girl_rails (4.2.1)       factory_girl (~> 4.2.0)       railties (>= 3.0.0)     faker (1.1.2)       i18n (~> 0.5)     ffi (1.9.3)     hike (1.2.3)     i18n (0.6.9)     jbuilder (1.0.2)       activesupport (>= 3.0.0)     jquery-rails (3.0.4)       railties (>= 3.0, < 5.0)       thor (>= 0.14, < 2.0)     json (1.8.1)     mail (2.5.4)       mime-types (~> 1.16)       treetop (~> 1.4.8)     mime-types (1.25.1)     mini_portile (0.5.2)     minitest (4.7.5)     multi_json (1.9.0)     nokogiri (1.6.1)       mini_portile (~> 0.5.0)     pg (0.15.1)     polyglot (0.3.4)     rack (1.5.2)     rack-test (0.6.2)       rack (>= 1.0)     rails (4.0.1)       actionmailer (= 4.0.1)       actionpack (= 4.0.1)       activerecord (= 4.0.1)       activesupport (= 4.0.1)       bundler (>= 1.3.0, < 2.0)       railties (= 4.0.1)       sprockets-rails (~> 2.0.0)     rails_12factor (0.0.2)       rails_serve_static_assets       rails_stdout_logging     rails_serve_static_assets (0.0.2)     rails_stdout_logging (0.0.3)     railties (4.0.1)       actionpack (= 4.0.1)       activesupport (= 4.0.1)       rake (>= 0.8.7)       thor (>= 0.18.1, < 2.0)     rake (10.1.1)     rdoc (3.12.2)       json (~> 1.4)     rspec-core (2.14.8)     rspec-expectations (2.14.5)       diff-lcs (>= 1.1.3, < 2.0)     rspec-mocks (2.14.6)     rspec-rails (2.14.1)       actionpack (>= 3.0)       activemodel (>= 3.0)       activesupport (>= 3.0)       railties (>= 3.0)       rspec-core (~> 2.14.0)       rspec-expectations (~> 2.14.0)       rspec-mocks (~> 2.14.0)     rubyzip (0.9.9)     sass (3.3.2)     sass-rails (4.0.1)       railties (>= 4.0.0, < 5.0)       sass (>= 3.1.10)       sprockets-rails (~> 2.0.0)     sdoc (0.3.20)       json (>= 1.1.3)       rdoc (~> 3.10)     selenium-webdriver (2.35.1)       childprocess (>= 0.2.5)       multi_json (~> 1.0)       rubyzip (< 1.0.0)       websocket (~> 1.0.4)     sprockets (2.12.0)       hike (~> 1.2)       multi_json (~> 1.0)       rack (~> 1.0)       tilt (~> 1.1, != 1.3.0)     sprockets-rails (2.0.1)       actionpack (>= 3.0)       activesupport (>= 3.0)       sprockets (~> 2.8)     sqlite3 (1.3.8)     thor (0.18.1)     thread_safe (0.2.0)       atomic (>= 1.1.7, < 2)     tilt (1.4.1)     treetop (1.4.15)       polyglot       polyglot (>= 0.3.1)     turbolinks (1.1.1)       coffee-rails     tzinfo (0.3.39)     uglifier (2.1.1)       execjs (>= 0.3.0)       multi_json (~> 1.0, >= 1.0.2)     websocket (1.0.7)     xpath (2.0.0)       nokogiri (~> 1.3)  PLATFORMS   ruby  DEPENDENCIES   bcrypt-ruby (= 3.1.2)   bootstrap-sass   capybara (= 2.1.0)   coffee-rails (= 4.0.1)   database_cleaner!   factory_girl_rails (= 4.2.1)   faker (= 1.1.2)   jbuilder (= 1.0.2)   jquery-rails (= 3.0.4)   pg (= 0.15.1)   rails (= 4.0.1)   rails_12factor (= 0.0.2)   rspec-rails   sass-rails   sdoc (= 0.3.20)   selenium-webdriver (= 2.35.1)   sqlite3 (= 1.3.8)   turbolinks (= 1.1.1)   uglifier (= 2.1.1) 

Answer 1

I ran in to this problem as well and it looks like an issue related to the latest version of sprockets and you can fix it as suggested by changing the Gemfile.lock, but if someone or something does a bundle update it's going to get broken again and I know some places don't like to check in Gemfile.lock until there's a push to stage.

If you use sass-rails better than 4.0.0 it will resolve the problem...

gem 'sass-rails', '~> 4.0.0' 

The problem is solved and it will limit sprockets to 2.11. From the generated Gemfile.lock...

    sass-rails (4.0.2)       railties (>= 4.0.0, < 5.0)       sass (~> 3.2.0)       sprockets (~> 2.8, <= 2.11.0)       sprockets-rails (~> 2.0.0)