Factories.rb file is not loading - ruby-on-rails

Question

I'm following ruby on rails tutorials 3.2 by Michael Hartl but when i put gem 'factory_girl_rails', '1.4.0' in my gemfile and run bundle install it shows "bundle complete" as the gem is already loaded in my PC. My problem is it's not generating the factories.rb file in spec folder. What is going wrong?
Gemfile:
source 'https://rubygems.org'
gem 'rails', '3.2.3'
gem 'bootstrap-sass', '2.0.0'
gem 'bcrypt-ruby', '3.0.1'
group :development, :test do
gem 'sqlite3', '1.3.5'
gem 'rspec-rails', '2.9.0'
gem 'annotate', '~> 2.4.1.beta'
end
# Gems used only for assets and not required
# in production environments by default.
group :assets do
gem 'sass-rails', '3.2.4'
gem 'coffee-rails', '3.2.2'
gem 'uglifier', '1.2.3'
end
gem 'jquery-rails', '2.0.0'
group :test do
gem 'capybara', '1.1.2'
gem 'factory_girl_rails', '1.4.0'
end
group :production do
gem 'pg', '0.12.2'
end
routes.rb:
SAMPLEApp::Application.routes.draw do
resources :users
root to: 'static_pages#home'
match '/signup', to: 'users#new'
match '/help', to: 'static_pages#help'
match '/about', to: 'static_pages#about'
match '/contact', to: 'static_pages#contact'
end

Answer 1

Running bundle install won't add any files to your Rails application. It will just download the proper libraries that it needs to use. Sometimes these libraries will come with a rails generator and you would run something like rails generate some_library:install. I don't think that's the case with factory_girl_rails. You probably need to add the file manually.