Thessaloniki Ruby Meetup & Rubyzino #30

Rubyzino + Introduction to Ruby on Rails on #thessrb #30. http://git.io/thessrb-30

Transcript

1. Thessaloniki Ruby Meetup #30 thessrb meetup 30 - Introduction to Ruby on Rails 1
2. Thessaloniki Ruby Meetup #30 Rubyzino Introduction to Ruby on Rails Questions Networking Halaruby thessrb meetup 30 - Introduction to Ruby on Rails 2
3. Rubyzino #30 thessrb meetup 30 - Introduction to Ruby on Rails 3
4. Rubykaigi thessrb meetup 30 - Introduction to Ruby on Rails 4
5. thessrb co-organizer thessrb meetup 30 - Introduction to Ruby on Rails 5
6. Ruby thessrb meetup 30 - Introduction to Ruby on Rails 6
7. Ruby 2.1.3 Released • Bugfixes • A garbage collection tweak that reduces memory consumption thessrb meetup 30 - Introduction to Ruby on Rails 7
8. Ruby — Sonic Pi A free sound synthesizer for live coding designed to support computing and music lessons within schools. Use code to compose and perform in classical and contemporary styles ranging from Canons to Dubstep. Sonic PI Website thessrb meetup 30 - Introduction to Ruby on Rails 8
9. Ruby — Sonic Pi, Haunted Bells loop do sample :perc_bell, rate: (rrand 0.125, 1.5) sleep rrand(0, 2) end thessrb meetup 30 - Introduction to Ruby on Rails 9
10. Ruby — Sonic Pi, Acid Walk in_thread do use_synth :fm sleep 2 loop do 28.times do sample :drum_bass_hard, amp: 0.8 sleep 0.25 play :e2, release: 0.2 sample :elec_cymbal, rate: 12, amp: 0.6 sleep 0.25 end sleep 4 end end use_synth :tb303 with_fx :reverb do |rev| loop do control rev, mix: rrand(0, 0.3) with_fx :slicer, phase: 0.125 do sample :ambi_lunar_land, sustain: 0, release: 8, amp: 2 end control rev, mix: rrand(0, 0.6) r = rrand(0.05, 0.3) 64.times do play chord(:e3, :minor).choose, release: r, cutoff: rrand(50, 90), amp: 0.5 sleep 0.125 end control rev, mix: rrand(0, 0.6) r = rrand(0.1, 0.2) with_synth :prophet do 32.times do sleep 0.125 play chord(:a3, :m7).choose, release: r, cutoff: rrand(40, 130), amp: 0.7 end end control rev, mix: rrand(0, 0.6) r = rrand(0.05, 0.3) 32.times do play chord(:e3, :minor).choose, release: r, cutoff: rrand(110, 130), amp: 0.4 sleep 0.125 end control rev, mix: rrand(0, 0.6) with_fx :echo, phase: 0.25, decay: 8 do 16.times do play chord([:e2, :e3, :e4].choose, :m7).choose, release: 0.05, cutoff: rrand(50, 129), amp: 0.5 sleep 0.125 end end end end thessrb meetup 30 - Introduction to Ruby on Rails 10
11. Rails thessrb meetup 30 - Introduction to Ruby on Rails 11
12. Rails 4.2.0 Beta Active Job: Write once in Active Job, run on many different queuing systems Adequate Record: Twice as fast Active Record common queries, Go Web Console: IRB console available in the browser by visiting /console, out of Google Summer of Code. thessrb meetup 30 - Introduction to Ruby on Rails 12
13. Europe Code Week 2014 thessrb meetup 30 - Introduction to Ruby on Rails 13
14. Europe Code Week 2014 • thessrb/meetup#27 • Ruby4Kids • KidsRuby thessrb meetup 30 - Introduction to Ruby on Rails 14
15. Jobs thessrb meetup 30 - Introduction to Ruby on Rails 15
16. Jobs — .NET web developer wanted by Atlantis Engineering • Thessaloniki based company • Develops web and desktop apps in .NET for the Industry thessrb/meetup#28 thessrb meetup 30 - Introduction to Ruby on Rails 16
17. Jobs — Experienced frond- end developer wanted by Ordereze • US based company with offices in Thessaloniki for software development • Reputation management for restaurants thessrb/meetup#31 thessrb meetup 30 - Introduction to Ruby on Rails 17
18. RSVP question(s) thessrb meetup 30 - Introduction to Ruby on Rails 18
19. RSVP question(s) Are you using Ruby on Rails to develop web applications? thessrb meetup 30 - Introduction to Ruby on Rails 19
20. Introduction to Ruby on Rails thessrb meetup 30 - Introduction to Ruby on Rails 20
21. Ruby on Rails, or simply Rails, is an open source web application framework written in Ruby. thessrb meetup 30 - Introduction to Ruby on Rails 21
22. Created by David H. Hansson or DHH Extracted from Basecamp, a project management tool by 37signals. thessrb meetup 30 - Introduction to Ruby on Rails 22
23. History Part I • Released as open source in July 2004, with commit rights in Feb 2005 • August 2006 Apple announced it would ship with Mac OS X v10.5 Leopard • The release was done in October 2007 • 2.3 was a major overhaul in March 2009 • Merb was launched in December 2008, and merged with Rails 3.0 thessrb meetup 30 - Introduction to Ruby on Rails 23
24. History Part II • Rails 3.1 August 2011, CoffeeScript & Sass, JQuery default JS lib Rails 4.1 April 2014, Spring, Variants, Enums, Mailer previews, secrets.yml thessrb meetup 30 - Introduction to Ruby on Rails 24
25. My Story • 2007 • Created a task management application for air conditioning service crews • Runs today as we speak on a very old RoR version ! thessrb meetup 30 - Introduction to Ruby on Rails 25
26. Model View Controller (MVC) pattern to organize application programming thessrb meetup 30 - Introduction to Ruby on Rails 26
27. MVC in Ruby on Rails • Model • Controller • Views thessrb meetup 30 - Introduction to Ruby on Rails 27
28. Convention over Configuration thessrb meetup 30 - Introduction to Ruby on Rails 28
29. Convention over Configuration Example • database table: orders with the primary key called id I know by convention that I will have: • model: order • controller: orders_controller • views: new, edit etc. for each action in the controller thessrb meetup 30 - Introduction to Ruby on Rails 29
30. Model A model in RoR maps: • to a table in a database (mostly) • and a Ruby file thessrb meetup 30 - Introduction to Ruby on Rails 30
31. A Controller • responds to external requests from the web server to the application by determining which view file to render. • queries one or more models directly for info to pass on to the view. • may provide one or more actions. • An action describes how to respond to a request. thessrb meetup 30 - Introduction to Ruby on Rails 31
32. An Action • will be accessible if a route is mapped to it Rails • encourages the usage of RESTful routes, with actions such as: create, new, edit, update, destroy, show, and index. • routes.rb thessrb meetup 30 - Introduction to Ruby on Rails 32
33. A View • is an erb file, which is compiled to HTML at run-time. • Many other templating systems can be used for views thessrb meetup 30 - Introduction to Ruby on Rails 33
34. View Example <h1>New Article</h1> <%= form_for :article do |f| %> <p> <%= f.label :title %><br> <%= f.text_field :title %> </p> <p> <%= f.label :text %><br> <%= f.text_area :text %> </p> <p> <%= f.submit %> </p> <% end %> thessrb meetup 30 - Introduction to Ruby on Rails 34
35. The End thessrb meetup 30 - Introduction to Ruby on Rails 35