install ruby on mac osx yosemite using rvm; frontend stuff; mongo

frontend

#####
# Gemfile
gem 'bootstrap-sass', '~> 3.3.4'
gem 'angularjs-rails'

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# application.scss
@import "bootstrap-sprockets";
@import "bootstrap";

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# application.js
//= require bootstrap-sprockets

mongoid

#####
# Gemfile
gem 'mongoid', '~> 4' # Rails 4
gem 'bson_ext'

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# model
class MyModel
  include Mongoid::Document
end

#####
# remove all references to active_record/ActiveRecord
# in application.rb, development.rb, production.rb, test.rb, rails_helper.rb (for RSpec)

#####
# application.rb -- Rails 4
# require "rails/all" <-- remove this
require "action_controller/railtie"
require "action_mailer/railtie"
require "sprockets/railtie"
require "rails/test_unit/railtie"
...
config.generators do |g|
  g.orm :mongoid
end

Mongoid.logger.level = Logger::DEBUG
Moped.logger.level = Logger::DEBUG

rb_install

# rails on mac
## rvm (https://rvm.io/rvm/install)
> [sudo] brew install gpg
> gpg --keyserver hkp://keys.gnupg.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3
> \curl -sSL https://get.rvm.io | bash -s stable

## restart shell
> [sudo] rvm install ruby-[version]
> rvm alias create default ruby-[version]
> rum use ruby-[version]