Rails is Just Ruby

RailsConf 2013 - Intro Track

Transcript

1. Ruby is Just Rails A Guide to Procrastination and Happiness
2. Stu Rails makes insanely easy Seemingly Magical
3. Protect entire system from unauthorized requests Seemingly Magical
4. Log every page load Seemingly Magical
5. Update full-text search engine every time a record is added Seemingly Magical
6. it’s not magic Magic It’s not magic (maybe at first)
7. http:/ /lotr.wikia.com/wiki/File:Gandalf-2.jpg
8. http:/ /www.ibeta.eu/blog/darth-vader-on-tedxeutropolis/
9. Wizard Like Powers Business People consider us wizards with our ability to create business value
10. Rails Helps us Along Rails helps us along
11. Rails Helps us Along Blocks
12. Rails Helps us Along Before Filters
13. Rails Helps us Along Callbacks
14. Rails Helps us Along Inheritance
15. Rails Helps us Along It all starts with a block
16. The Block
17. 10.times do puts "YOLO" end
19. @users.each do |user| <%= user.email %> end
20. User.create do |u| u.name = 'jwo' end
21. @users.map {|u| u.total_due }.sum
22. Rails Helps us Along code that gets delayed and executed later
23. Block Rules Every Ruby method can receive a block
24. Block Rules The method has to yield to the block to be e ective
25. Block Rules Can take parameters and won’t scream if you send in too few
26. args.each do |key,value| end
27. Advanced Blocks Advanced Block Tips
28. Block Rules Don’t use ‘return’ in a block
29. Block Rules Use Ruby’s implicit returns instead
30. Advanced Blocks Add retries for volatile actions
31. 10.times.retry do SomeNetworkCommunicationThingyHere.new end https://github.com/schneems/rrrretry
32. Before Filters
33. Before Filters Used in Controllers
34. Before Filters Rails actions are your interactions with users (get/post data)
35. Before Filters Can be before or after
36. Before Filters If your before filter returns, or redirects the action won’t happen
37. before_filter do |controller| unless controller.send(:logged_in?) redirect_to new_login_url end end
38. class ApplicationController before_filter :authenticate_user def authenticate_user unless logged_in? redirect_to new_login_url end end end
39. class PostsController < AppController # already secured end
40. class PublicPostsController < AppController skip_before_filter :authenticate_user end
41. Callbacks
42. About Callbacks Code you can define to run later works in Models too
43. About Callbacks It’s like HollaBack, but not
44. Callback Example Stack Overflow Example: Downcasing email
45. class User < ActiveRecord::Base before_validation do |user| user.email = user.email.downcase end end
46. Callback Example Real World Example: Full Text Searching (websolr)
47. class Post < ActiveRecord::Base searchable do text :title, :body end end https://github.com/sunspot/sunspot
48. Post.search do fulltext 'best pizza' end https://github.com/sunspot/sunspot
49. after_destroy do |searchable| searchable.remove_from_index end https://github.com/sunspot/sunspot/blob/master/ sunspot_rails/lib/sunspot/rails/searchable.rb
50. Workshop Time
51. Workshop Create a beeper alert program
52. Workshop Criteria if alarm is critical, send SMS
53. Workshop Criteria if alarm is warning, send email
54. I’m JWo Thanks! @jwo Jesse Wolgamott.com