A few slides about the migration from Rails 4 to Rails 5

based on github.com/netguru/reminders app

Transcript

1. Rails 5 is here a few slides about the migration from Rails ~4
3. my slides are not about the features - you have to check them out on your own!
4. I need a TODO app for test
5. but let’s upgrade something more useful
7. https://github.com/ netguru/reminders
8. Gemfile gem "rails", "~> 4" gem "coffee-rails" gem "bootstrap-datepicker-rails" gem "decent_exposure" gem "draper" gem "jquery-rails", "4.0.4" # version 4.0.5 breaks jquery-datatables
9. UPDATING!
10. Step 1 - changing relevant gems gem "rails", "~> 4”
11. Step 1 - changing relevant gems gem "rails", "~> 4” gem "rails", "~> 5"
12. Step 1 - changing relevant gems bundle update rails
15. Step 2 - updating gems along the way bundle update rails railties
16. meh!
17. Step 2 - updating gems along the way bundle update rails railties sass-rails
18. nope!
19. Step 2 - updating gems along the way bundle update rails railties sass-rails coffee-rails slim-rails
20. still missing something!
21. Step 3 - strict dependencies gem "jquery-rails", "4.0.4" # version 4.0.5 breaks jquery-datatables
22. Step 3 - strict dependencies gem "jquery-rails", "4.0.4" # version 4.0.5 breaks jquery-datatables gem "jquery-rails"
23. Step 3 - strict dependencies gem "sass-rails", "~> 5.0" 
 gem "sass-rails"
24. Step 3 - strict dependencies bundle update rails railties sass-rails coffee-rails slim-rails jquery-rails
26. better, but still
27. let’s have a look again
29. https://github.com/ evrone/quiet_assets/pull/ 51
30. so we don’t need it anymore
31. Step 1 - changing relevant gems gem "quiet_assets"
32. Step 1 - changing relevant gems gem "quiet_assets" gem "quiet_assets"
33. Step 2 - updating gems along the way bundle update rails railties coffee- rails slim-rails
34. pretty good, we need to solve rspec-rails
35. Step 2 - updating gems along the way bundle update rails railties coffee- rails slim-rails rspec-rails
37. hahahha, you fool
38. zoom in
40. there should be puma here, right?
41. Step 1 - changing relevant gems gem "thin" gem "thin"
42. Step 2 - updating gems along the way bundle update rails railties coffee- rails slim-rails rspec-rails
43. yeah
44. step 1&2 done - our Gemfile is ok
45. Step 3 - draper /Users/adamo/.rbenv/versions/2.2.3/lib/ ruby/gems/2.2.0/gems/draper-2.1.0/lib/ draper.rb:5:in `require': cannot load such file -- active_model/serializers/ xml (LoadError)
46. It turns out, draper gem isn’t quite ready for Rails 5
47. It turns out, draper gem isn’t quite ready for Rails 5
48. I’ve used drape gem instead but you should follow https://github.com/drapergem/ draper/pull/752
49. Step 3 - draper gem "draper" gem "draper"
50. Step 3 - draper bundle
51. drape is pretty much the same as draper but you have to change the namespace
52. let’s create base decorator (it should have been here before)
53. Step 3 - draper class BaseDecorator < Drape::Decorator; end class ProjectDecorator < BaseDecorator
54. awesome!
55. Step 4 - rollbar bundle update rollbar # 2.8.0 wasn’t good enough
56. push it!
58. webrick? it’s so <=Rails4
60. Step 4 - puma gem „puma" bundle
62. success!
63. Step 4 - rails:update bin/rake rails:update
64. keep going
65. Step 4 - rspec bundle update rspec-core
66. it turns out, you have to be strict this time
67. Step 4 - rspec gem "rspec-rails", "~> 3.5" bundle
68. yep!
69. Step 5 - decent_exposure /Users/adamo/code/reminders/app/ controllers/application_controller.rb: 2:in `<class:ApplicationController>': undefined method `decent_configuration' for ApplicationController:Clas
70. well, read the wiki https://github.com/hashrocket/ decent_exposure/wiki/Api-changes-in- version-3#undefined-method- decent_configuration
71. Step 5 - decent_exposure decent_configuration do
 strategy DecentExposure::StrongParametersStrategy
 end
72. Step 6 - rails-controller- testing 245 examples, 3 failures NoMethodError: assert_template has been extracted to a gem. To continue using it, add `gem 'rails-controller-testing'` to your Gemfile.
73. Step 6 - rails-controller- testing gem „rails-controller-testing" bundle
74. YES
75. Step 6 - rack-mini-profiler bundle update rack-mini-profiler
76. QL
77. it works:)
78. https://github.com/ netguru/reminders/pull/35
79. –no one ever “migration will be easy”
80. –me, now “but please do it”
81. t.hanks! adam nowak / @lubieniebieski 06/07/2016