RUBY ON RAILS

introduction and technical overview

Andy Wenk

Overview

PHILOSOPHY
ARCHITECTURE
KEY FEATURES
ROUTES
MVC
ENVIRONMENTS
ASSET PIPELINE
PRODUCTION SERVER
DEPLOYMENT
TESTING
EXTEND IT WITH RUBYGEMS
LINKS

PHILOSOPHY

Convention over Configuration
Don't Repeat Yourself
Fat models, skinny controllers
Rails is opinionated
Perl is not opinionated

Convention over Configuration

... means you’ll be productive. You won’t spend time setting up configuration files. You’ll spend less time thinking about where things go and what names to assign. And, because other developers have learned the same conventions, it is easier to collaborate.

Don't Repeat Yourself

... means that information is located in a single, unambiguous place. For example, using the ActiveRecord module of Rails, the developer does not need to specify database column names in class definitions. Instead, Ruby on Rails can retrieve this information from the database based on the class name.

Fat models, skinny controllers

... means that most of the application logic should be placed within the model while leaving the controller as light as possible.

Rails is opinionated

There is a "Rails way" for many of the problems that must be solved by a web application developer. If you follow the Rails conventions, you'll have fewer decisions to make and you'll find more of what you need is already built. The benefit is faster development, improved collaboration, and easier maintenance.

Perl is not opinionated

Perl is a prime example of "non-opinionated" software; there's no "right way" or "best way" to solve programming problems in Perl. Famously, Perl's documentation states, "In general, [Perl's built-in functions] do what you want, unless you want consistency."

ARCHITECTURE

KEY FEATURES

MVC
RESTful
support for many databases
development server
asset pipeline
mailer
HAML, ERB
CSS, SCSS, SASS
many, many helpers
Rack middleware

ROUTES

					        
Sumo::Application.routes.draw do
  root to: redirect('/start')

  match '/start', to: 'pages#home', as: 'home'
  match '/impressum', to: 'pages#imprint', as: 'imprint'
  
  post 'bestellung/bestellen', controller: 'checkout', action: 'place_order', as: 'checkout_place_order'
  get 'bestellung/bestaetigung', controller: 'checkout', action: 'confirm', as: 'checkout_confirm'

  resources :registration, path: 'registrierung'
  
  resources :cart, path: 'warenkorb' do
    member do
      get 'delete'
    end
  end
end