The Rubyday 2013 presentation about Domain Driven Design implementation in Ruby. Source code is available here https://github.com/emadb/ruby_loves_ddd

1. RUBY♥DDD
@EMADB
was DDD IN RUBY

4. HI,I’M
EMANUELE
@EMADB

5. DDDIS
ABOUT...

6. ANALYSIS

7. DESIGN

8. PATTERNS

10. UBIQUITOUS
LANGUAGE

12. BOUNDED
CONTEXT

13. Customer Customer
Id
Name
ShippingAddress
Id
Name
ShipOrder(...)
VatCode
BillingAddress

15. ENTITYAND
VALUE
OBJECT

16. Customer
Address

17. AGGREGATE

20. REPOSITORYAND
SERVICE

22. DOMAIN
EVENT

23. RUBY

24. ‣Fully OOP (...for real)
‣Expressiveness
‣Metaprogramming
‣DSL with ease
‣Gems...tons of gems
‣Great community

25. CODE

26. WE CAN DO
MORE

27. UI
DOMAIN MODEL/BUSINESS LAYER
DATA LAYER/ORM
DATABASE
APPLICATION LAYER

28. READ
vs
WRITE

29. STOP
THINKINGIN
CRUD

30. CQRS

31. UI
COMMANDS/HANDLERS
DATA LAYER
DATABASE
DOMAIN MODEL

32. UI
COMMANDS/HANDLERS
DATA LAYER
WRITE DB
DOMAIN MODEL
READ DB
HANDLER

33. EVENT
SOURCING

34. STATE
vs
TRANSITIONS

35. ADD ITEM

36. ADD ITEM
ADD ITEM

37. ADD ITEM
ADD ITEM
REMOVE ITEM

38. ADD ITEM
ADD ITEM
REMOVE ITEM
APPLY COUPON

39. ADD ITEM
ADD ITEM
REMOVE ITEM
APPLY COUPON
SET SHIPPING ADDRESS

40. ADD ITEM
ADD ITEM
REMOVE ITEM
APPLY COUPON
SET SHIPPING ADDRESS
COMPLETE ORDER

41. ‣ Don’t store the state but the
deltas
‣ The state can be rebuilt from
events
‣ Simple storing structures
‣ Snapshot could be helpful
EVENTSOURCING

42. THISRESOLVE
THEEPIC
CUSTOMER
REQUEST

43. IWANTIT
FOR
YESTERDAY

45. CODE

46. REFERENCES

49. SOURCECODE
https://github.com/emadb/ruby_loves_ddd

50. SPECIAL THANKS TO @BITTSTATIC @SANDROPAGANOTTI @AMELCHIORI