This document provides summaries of various Ruby gems that can be used for different purposes like frameworks, frontend development, testing, deployment, and more. Each gem is briefly described, including what problem it addresses or what functionality it provides. Examples are given showing how some of the gems can be used in practice.

1. GEM
B O Y S
04/11/2013
@mukkoo
@delphaber
@welaika

2. RUBY GEMS?
WHAT ARE

3. RUBY GEMS?
WHAT ARE
Ruby programs and libraries
(in a self-contained format
called a "gem").

4. FRAMEWORKS
& BACKENDS

5. gem 'active_admin'
FRAMEWORKS & BACKENDS

6. gem 'active_admin'
FRAMEWORKS & BACKENDS
Active Admin is a Ruby on Rails framework
for creating elegant backends for website
administration.

7. Active Admin in Action
FRAMEWORKS & BACKENDS

8. Active Admin in Action
FRAMEWORKS & BACKENDS
code

9. Active Admin in Action
FRAMEWORKS & BACKENDS
view

10. FRONTEND

11. gem 'simple_form'
FRONTEND

12. gem 'simple_form'
FRONTEND
Forms made easy for Rails! It's tied to a
simple DSL, with no opinion on markup.

13. Simple Form in Action
FRONTEND
Without Simple Form
Without Simple Form

14. Simple Form in Action
FRONTEND
Without Simple Form
With Simple Form

15. gem 'compass'
FRONTEND

16. gem 'compass'
FRONTEND
Compass is an open-source CSS Authoring
Framework. The compass core framework
is a design-agnostic framework that
provides common code that would
otherwise be duplicated across other
frameworks and extensions.

17. Compass in Action
FRONTEND

18. Compass in Action
FRONTEND
Without Compass

19. Compass in Action
FRONTEND
With Compass

20. REPORTING
& DEBUGGING

21. gem 'better_errors'
REPORTING & DEBUGGING

22. gem 'better_errors'
REPORTING & DEBUGGING
Better Errors replaces the standard Rails
error page with a much better and more
useful error page.

23. Better Errors in Action
REPORTING & DEBUGGING

24. Better Errors in Action
REPORTING & DEBUGGING

25. gem 'airbrake'
REPORTING & DEBUGGING

26. gem 'airbrake'
REPORTING & DEBUGGING
When an uncaught exception occurs,
Airbrake will POST the relevant data to the
Airbrake server specified in your
environment.

27. Airbrake in Action
REPORTING & DEBUGGING

28. Airbrake in Action
REPORTING & DEBUGGING

29. Airbrake in Action
REPORTING & DEBUGGING

30. gem 'newrelic_rpm'
REPORTING & DEBUGGING

31. gem 'newrelic_rpm'
REPORTING & DEBUGGING
New Relic is a performance management
system. It provides you with deep
information about the performance of
your application as it runs in production.

32. NewRelic in Action
REPORTING & DEBUGGING

33. NewRelic in Action
REPORTING & DEBUGGING

34. TESTING

35. gem 'letter_opener'
TESTING

36. gem 'letter_opener'
TESTING
Preview email in the browser instead of
sending it. This means you do not need to
set up email delivery in your development
environment, and you no longer need to
worry about accidentally sending a test
email to someone else’s address.

37. Letter Opener in action
TESTING

38. Letter Opener in action
TESTING

39. gem 'factory_girl'
TESTING

40. gem 'factory_girl'
TESTING
Factory girl is a fixtures replacement with
a straightforward definition syntax,
support for multiple build strategies and
support for multiple factories for the same
class.

41. Factory Girl in action
TESTING

42. Factory Girl in action
TESTING

43. gem 'timecop'
TESTING

44. gem 'timecop'
TESTING
A gem providing "time travel", "time
freezing", and "time acceleration"
capabilities, making it dead simple to test
time-dependent code.

45. Timecop in action
TESTING

46. Timecop in action
TESTING

47. TOOLS

48. gem 'delayed_job_active_record'
TOOLS

49. gem 'delayed_job_active_record'
TOOLS
Database based asynchronous priority
queue system.
Useful for:
- sending massive newsletters
- image resizing
- http downloads
- batch imports
- spam checks

50. Delayed Job in action
TOOLS

51. Delayed Job in action
TOOLS

52. gem 'whenever'
TESTING

53. gem 'whenever'
TESTING
Cron jobs in ruby.

54. Whenever in action
TESTING

55. Whenever in action
TESTING

56. Whenever in action
TESTING

57. gem 'faker'
TESTING

58. gem 'faker'
TESTING
A library for generating fake data such as
names, addresses, and phone numbers.

59. Faker in action
TESTING

60. Faker in action
TESTING

61. AUTHENTICATION
AUTHORIZATION

62. gem 'cancan'
AUTHENTICATION / AUTHORIZATION

63. gem 'cancan'
AUTHENTICATION / AUTHORIZATION
CanCan is an authorization library for Ruby
on Rails which restricts what resources a
given user is allowed to access.

64. CanCan in action
AUTHENTICATION / AUTHORIZATION

65. CanCan in action
AUTHENTICATION / AUTHORIZATION

66. gem 'devise'
AUTHENTICATION / AUTHORIZATION

67. gem 'devise'
AUTHENTICATION / AUTHORIZATION
Devise is a flexible authentication solution
for Rails.

68. Devise in action
AUTHENTICATION / AUTHORIZATION

69. Devise in action
AUTHENTICATION / AUTHORIZATION

70. UPLOADS
MANAGEMENT

71. gem 'paperclip'
UPLOADS MANAGEMENT

72. gem 'paperclip'
UPLOADS MANAGEMENT
Paperclip is intended as an easy file
attachment library for Active Record.

73. Paperclip in action
UPLOADS MANAGEMENT

74. Paperclip in action
UPLOADS MANAGEMENT

75. DEPLOY

76. gem 'capistrano'
DEPLOY

77. gem 'capistrano'
DEPLOY
A remote server automation and
deployment tool.

78. Capistrano in action
DEPLOY

79. Capistrano in action
DEPLOY
$ cap deploy

80. Capistrano in action
DEPLOY

81. … and the other gems we love
bourbon
capybara-webkit
carrierwave
database_cleaner
date_validator
dragonfly
email_validator
friendly_id
geocoder
inherited_resources
neat
nested_form
omniauth
pry
recipient_interceptor
showcase
simplecov
slim-rails
zeus

82. Pizza Time!
04/11/2013
Filippo Gangi Dino @mukkoo
Fabrizio Monti @delphaber
weLaika @welaika dev.welaika.com

83. What are your
gem(s), boys?
And now