Bootstrap is not styling anything with Ruby on Rails - css

Question

I am using Bootstrap for the first time and it is not styling anything. I have already applied the answers from Bootstrap is not styling anything
and still no luck.
I have #import "bootstrap"; in my stylesheet
I also have the appropriate gems in my Gemfile. Here it is:
source 'https://rubygems.org'
# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
gem 'rails', '4.1.5'
# Use sqlite3 as the database for Active Record
group :development,:test do
gem 'sqlite3'
end
group :production do
gem 'pg'
end
gem 'autoprefixer-rails'
group :assets do
gem 'sass-rails', '~> 4.0.3'
# 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'
gem 'bootstrap-sass', '~> 3.2.0'
end
# 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', '~> 2.0'
# bundle exec rake doc:rails generates the API under doc/api.
gem 'sdoc', '~> 0.4.0', group: :doc
# Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
gem 'spring', group: :development
# Use ActiveModel has_secure_password
# gem 'bcrypt', '~> 3.1.7'
# Use unicorn as the app server
# gem 'unicorn'
# Use Capistrano for deployment
# gem 'capistrano-rails', group: :development
# Use debugger
# gem 'debugger', group: [:development, :test]

Answer 1

1) Add
config.assets.precompile += %w(*.png *.jpg *.jpeg *.gif)
to application.rb (inside the class)
2) Add #import 'bootstrap'; to the top line of a new CSS file.

Answer 2

Rails 4 does not use an assets group in Gemfile, So remove that & then edit your application.css to include following:
#import "bootstrap-sprockets";
#import "bootstrap";
Note: "bootstrap-sprockets" must be imported before "bootstrap" and "bootstrap/variables"
Now add require Bootstrap Javascripts in app/assets/javascripts/application.js:
//= require jquery
//= require bootstrap-sprockets