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Rails advantages and techniques
- 1. Rails advantages and techniques
- 3. • Jan ‘DefV’ De Poorter • Developer, IT Engineer • Openminds, #1 Rails Hoster in .be • blog.defv.be • Trying to be first on google as Jan
- 5. Ruby on Rails it does scale
- 6. • Framework based on Ruby • Fast, agile development • www.rubyonrails.com
- 7. So... Why ? “I already know PHP/.NET/...”
- 9. • CRUD • Scaffolding (if you really need to) • DRY • AJAX • acts_as_something
- 10. Maintainable
- 11. • Very readable code • Implemented documentation system (RDOC) • Tests makes sure you don’t break anything
- 13. Model View Controller • Interface to the database • Business Logic goes here • For the DataBase Admin class User < ActiveRecord::Base has_many :tasks end class Task < ActiveRecord::Base belongs_to :user end
- 14. Model View Controller • Link between DB (model) and User (view) • HTTP / Sessions / Cookies / Post / Get • For the Developer class TaskController < ApplicationController def index @tasks = User.find(session[:user_id]).tasks end end
- 15. Model View Controller • Web Interface • What the client sees • For the Designer ... <body> <% @tasks.each do |task| %> <div class=’task’> <%= task.content %> is <%= task.status %> </div> <% end %> </body>
- 16. Testing
- 18. Test-Driven Development • Write tests first
- 19. Test-Driven Development • Write tests first • FAIL
- 20. Test-Driven Development • Write tests first • FAIL • Implement
- 21. Test-Driven Development • Write tests first • FAIL • Implement • SUCCEED
- 22. Test-Driven Development • Write tests first • FAIL • Implement • SUCCEED • Clean Up
- 23. Test-Driven Development • Write tests first • FAIL • Implement • SUCCEED • Clean Up • Check-In to Version Management
- 24. that seems more work?
- 25. no
- 26. no (but..)
- 27. • No, because • No more broken builds • Fix bugs forever • Think before you implement • Small steps • Yes, because • it takes time to learn
- 28. Not only for developers!
- 29. def test_if_layout_elements_are_present assert_select “body” do assert_select “div.task”, :count => 3 do assert_select “ul” do assert_select “li”, :count => 3 end end end end
- 30. is that all ?
- 31. No!
- 32. polymorphism No!
- 33. polymorphism 20.minutes.ago No!
- 34. polymorphism 20.minutes.ago 1.gigabyte No!
- 35. polymorphism 20.minutes.ago 1.gigabyte No! time_ago_in_words
- 36. polymorphism 20.minutes.ago 1.gigabyte No! prototype time_ago_in_words
- 37. polymorphism 20.minutes.ago has_and_belongs_to_many 1.gigabyte No! prototype time_ago_in_words
- 38. polymorphism 20.minutes.ago has_and_belongs_to_many 1.gigabyte No! cache prototype time_ago_in_words
- 39. polymorphism 20.minutes.ago has_and_belongs_to_many 1.gigabyte No! routes cache prototype time_ago_in_words
- 40. link_to_remote polymorphism 20.minutes.ago has_and_belongs_to_many 1.gigabyte No! routes cache prototype time_ago_in_words
- 41. link_to_remote polymorphism 20.minutes.ago has_and_belongs_to_many <%= debug object %> 1.gigabyte No! routes cache prototype time_ago_in_words
- 42. link_to_remote polymorphism 20.minutes.ago has_and_belongs_to_many <%= debug object %> 1.gigabyte No! routes cache prototype delegate time_ago_in_words
- 43. link_to_remote polymorphism 20.minutes.ago has_and_belongs_to_many <%= debug object %> 1.gigabyte No! routes group_by cache prototype delegate time_ago_in_words
- 44. link_to_remote polymorphism 20.minutes.ago has_and_belongs_to_many <%= debug object %> 1.gigabyte No! routes find_by_sql group_by cache prototype delegate time_ago_in_words
- 45. link_to_remote polymorphism 20.minutes.ago has_and_belongs_to_many <%= debug object %> 1.gigabyte REST No! routes find_by_sql group_by cache prototype delegate time_ago_in_words
- 46. titleize link_to_remote polymorphism 20.minutes.ago has_and_belongs_to_many <%= debug object %> 1.gigabyte REST No! routes find_by_sql group_by cache prototype delegate time_ago_in_words
- 47. titleize link_to_remote polymorphism 20.minutes.ago has_and_belongs_to_many <%= debug object %> 1.gigabyte REST No! routes ... find_by_sql group_by cache prototype delegate time_ago_in_words
- 48. Q &A Examples? Discussion Thank you for listening Jan De Poorter - Openminds