Ruby on Rails An introduction Who am I

Ruby on Rails: An introduction - Who am I? Ro. R: An introduction Presented by: Maciej Mensfeld senior ruby developer@araneo. pl lead ruby developer@wordwatch. com maciej@mensfeld. pl dev. mensfeld. pl github. com/mensfeld Maciej Mensfeld

Ruby on Rails: An introduction - Rules Ro. R: An introduction Please… • …ask me to slow down, if I speak to quickly; • …ask me again, if I forget; • …ask questions, if anything i say is not clear; • …feel free to share your own observations Maciej Mensfeld 2/30

Ruby on Rails: An introduction – Rails what? Ro. R: An introduction Maciej Mensfeld 3/30

Ruby on Rails: An introduction – What is Ruby on Rails? Ro. R: What is Ruby on Rails? • Full stack web application framework • Written in the Ruby programming language • Growing community since 2004 • Open Source and Free • Focused on developer productivity and getting the job done – fast! Maciej Mensfeld 4/30

Ruby on Rails: An introduction – What is Ruby on Rails? Ro. R: Why Ruby on Rails? Lot of frameworks exists on the market and a lot of programming languages for the web but… Rails leads Maciej Mensfeld 5/30

Ruby on Rails: An introduction – What is Ruby on Rails? Ro. R: Why Ruby on Rails? • Rails give the developers a real productivity boost for developing web applications • Because of Ruby and domain specific languages • Convention over Configuration • Productivity boost! 3 -4 times faster than dev with zend Really faster? Maciej Mensfeld 6/30

Ruby on Rails: An introduction – What is Ruby on Rails? Ro. R: Why Ruby on Rails? Designed to make it easier to develop, deploy, and maintain web applications Design with Model-View-Controller Also based on DRY concept Don’t Repeat Yourself (DRY) Every piece of knowledge should be expressed in just one place Maciej Mensfeld 7/30

Ruby on Rails: An introduction – Who uses Ro. R? I do! ; ) (but not only…) and thousands of other… Maciej Mensfeld 8/30

Ruby on Rails: An introduction – The framework Lil bit bout Rails structure The Framework Maciej Mensfeld 9/30

Ruby on Rails: An introduction – The framework Lil bit bout Rails structure Try it out! cd ~ rails new my_blog … (output): create README create Rakefile create config. ru create. gitignore create Gemfile create app/assets/images/rails. png … To much stuff! WTF? ! Maciej Mensfeld 10/30

Ruby on Rails: An introduction – The framework Lil bit bout Rails structure Fortunately you don’t need to care about this : ) Maciej Mensfeld 0

Ruby on Rails: An introduction – The framework MVC Maciej Mensfeld 12/30

Ruby on Rails: An introduction – The framework Rails MVC Maciej Mensfeld 13/30

Ruby on Rails: An introduction – The framework Models ; ) Maciej Mensfeld 14/30

Ruby on Rails: An introduction – The framework Active. Record models Maciej Mensfeld 15/30

Ruby on Rails: An introduction – The framework Fat models, thin controllers Models should be… Maciej Mensfeld Fat! Fat! Fat!!!! Fat!!!! 16/30

Ruby on Rails: An introduction – The framework But… don’t piss off Vegeta ; ) Make fat models and thin controllers or Vegeta will visit U… Maciej Mensfeld 17/30

Ruby on Rails: An introduction – The framework Action. Controller Maciej Mensfeld 18/30

Ruby on Rails: An introduction – The framework Action. Controller – be Restful Maciej Mensfeld 19/30

Ruby on Rails: An introduction – The framework Action. Controller – be Restful Maciej Mensfeld 20/30

Ruby on Rails: An introduction – The framework Action. View Maciej Mensfeld 21/30

Ruby on Rails: An introduction – The framework Action. View templates ERB – templates with HTM and Ruby code – used to display dinamic stuff from prepared by controllers Maciej Mensfeld 22/30

Ruby on Rails: An introduction – Example app Enough theory, let’s start the magic! Maciej Mensfeld 23/30

Ruby on Rails: An introduction – Example app Generate Rails scaffold… Try it out! Maciej Mensfeld 24/30

Ruby on Rails: An introduction – Example app Start rails server to check if it works Try it out! Go to http: //localhost: 3000/ Maciej Mensfeld 25/30

Ruby on Rails: An introduction – Example app Yay! It works! Maciej Mensfeld 26/30

Ruby on Rails: An introduction – Example app Creating Posts Try it out! Maciej Mensfeld 27/30

Ruby on Rails: An introduction – Example app Creating Posts Try it out! Yeah it works but… we can create empty posts : ( not good : ( Maciej Mensfeld 28/30

Ruby on Rails: An introduction – Example app Protect create/update/destroy Try it out! Maciej Mensfeld Our blog works but anyone can add, edit and remove posts… shitty : / 29/30

Ruby: writing some cool stuff Live long and prosper! Presented by: Maciej Mensfeld maciej@mensfeld. pl dev. mensfeld. pl github. com/mensfeld Maciej Mensfeld 30/30