Rails custom layers _full_for_pivocourse

2. VOLODYA SVEREDYUK
Ruby | Rails Dev
facebook.com/sveredyuk
twitter.com/sveredyuk
github.com/sveredyuk

3. Rails
Custom Layers

4. Model
Controller
View

5. BUSINESS LOGIC ?

6. BUSINESS LOGIC !

13. Model Controller View
HTTP
Services
BUSINESS
Operations Queries Policies

14. SOLID
DRY
KISS
GOOGLE HELP!

15. SERVICE OBJECT

16. Service Objects
are created when an action:
is complex (such as calculating an employee’s salary)
uses APIs of external services
clearly doesn’t belong to one model (for example, deleting
outdated data)
uses several models (for example, importing data from one
file to several models)

18. REFACTORING

19. REFACTORING

20. SINGLE RESPONSIBILITY

21. NAMING

22. TEST

23. FORM OBJECT

24. Form Objects is a design
pattern that encapsulate logic
related to validating and
persisting data

26. VALIDATIONS

28. FORM

30. CONTOLLER

31. SINGLE RESPONSIBILITY

32. VALUE OBJECT

33. DATA SPECIFIC

34. MONEY

36. QUERY OBJECT

37. Query Object is a design
pattern that lets us extract
query logic from Controllers
and Models into reusable
classes.

38. QUERIES

39. QUERIES EVERYWHERE

40. TEST IT EASY

41. POLICY OBJECT

42. Policy Objects encapsulate
complex business rules and can
easily be replaced by other
Policy Objects with different
rules.

43. CAN OR NOT ?

44. POLICY CAN ?

46. TEST IT EASY

47. WHY I NEED ALLTHIS ?

48. Models
Views
Controllers
Services
LEVELS OF
INDIRECTION

49. PROGRESSIVE
ENHANCEMENT

52. ACTIVE INTERACTION

55. RECTIFY

57. DRYTRANSACTION

58. HTTP://TRAILBLAZER.TO/

59. WTF isTrailblazer ?

61. FLOW

62. CONCEPTS

63. QUESTIONS ?