gistfile1.rb

# In Gemfile...
group :development do
  gem 'sqlite3-ruby', '1.2.5', :require => 'sqlite3'
end

group :production do
  gem 'mysql2'
end



# In database.yml
development:
  adapter: sqlite3
  database: db/development.sqlite3
production:
  adapter: mysql2
  encoding: utf8
  database: project_name_production
  username: whatever
  password: password123