Rails basics

Signed-off-by: Yury Kaliada <fut.wrk@gmail.com>

Author: FUT

.ruby-version

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-ruby-2.1.5
+ruby-2.2.2

files/.ruby-gemset

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+courses

files/.ruby-version

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+2.1.4

notes/21 - Rails basics.md

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+# Rails basics
+
+###What is Rails?
+Rails is a web application development framework written in the Ruby language. It is designed to make programming web applications easier by making assumptions about what every developer needs to get started. 
+
+The Rails philosophy includes two major guiding principles:
+
+Don't Repeat Yourself: DRY is a principle of software development which states that "Every piece of knowledge must have a single, unambiguous, authoritative representation within a system." By not writing the same information over and over again, our code is more maintainable, more extensible, and less buggy.
+Convention Over Configuration: Rails has opinions about the best way to do many things in a web application, and defaults to this set of conventions, rather than require that you specify every minutiae through endless configuration files.
+
+
+### Installing rails
+```
+$ gem install rails
+$ rails --version
+$ rails new my_app
+```
+
+### Files
+
+Describe each folder and it's content
+
+### Run server
+
+```
+rails s
+```
+
+### Scaffolding
+
+```
+rails generate controller welcome index
+rails g model User
+rails g migration Name field:type
+rails g scaffold
+```
+
+### Routes
+
+Take care of `root` path
+
+```
+root 'welcome#index'
+```
+
+# Useful gems
+
+```
+gem 'nokogiri'
+
+gem 'cancancan'
+gem 'capistrano'
+gem 'coffee-rails', '~> 4.0.0'
+gem 'font-awesome-rails'
+gem 'httparty'
+gem 'i18n-js'
+gem 'oauth2'
+gem 'paperclip'
+gem 'pdfkit'
+gem 'pg'
+gem 'rabl'
+gem 'rails', '4.2.0'
+gem 'sass-rails', '~> 5.0.1'
+gem 'sidekiq'
+gem 'slim'
+gem 'sorcery'
+gem 'uglifier', '>= 1.3.0'
+gem 'unicorn'
+gem 'whenever', :require => false
+gem 'paranoia', '~> 2.0'
+
+
+group :test do
+  gem 'vcr'
+  gem 'webmock'
+end
+
+group :development, :test do
+  gem 'rspec'
+  gem 'database_cleaner'
+  gem 'factory_girl_rails'
+  gem 'jazz_hands', github: 'nixme/jazz_hands', branch: 'bring-your-own-debugger'
+  gem 'proxylocal'
+  gem 'quiet_assets'
+end
+```