Attributes API 実践

Rails Developers Meetup 2018 Day 3 Extreme に登壇した時の発表資料です。

https://qiita.com/alpaca_taichou/items/bebace92f06af3f32898
https://github.com/alpaca-tc/active_model_attributes_backport
https://github.com/alpaca-tc/active_record_encryption

Transcript

1. Attributes API ࣮ફ @alpaca_tc 1
2. プロフィール @alpaca_tc ΞϧύΧ͍ͨͪΐ͏ Moneyforward, inc Engineer 2
3. Έͳ͞Μ 3
4. Attributes API 4
5. ஌ͬͯ·͔͢ʁ 5
7. ͜Ε 7
8. !ʮଘࡏ͸஌ͬͯΔʯ 8
9. ࢖ͬͯ·͔͢ʁ 9
10. "ʮ࢖ͬͨ͜ͱͳ͍ʯ 10
11. kamipo͞Μᐌ͘ 11
12. ” “ ΧελϚΠζ ͍ͯ͠Δਓ͸ 2 % 12
13. 120ਓ * 2% HERE 13
14. 120 * 2% = 2.4 ਓ ձ৔ 14
15. ࠓ೔͸ͦΜͳ APIΛ࢖͍͜ͳ͢࿩ 15
16. ࿩͢͜ͱ • Attributes APIͱ͸ • Attributes APIྺ࢙ • ࣮ફฤ 16
17. • Attributes APIͱ͸ • Attributes APIྺ࢙ • ࣮ફฤ ࿩͢͜ͱ 17
18. ARͷܕม׵ Attributes API͸ܕม׵ʹ·ͭΘΔAPI 18
19. ARͷܕม׵ ܕͷఆٛ͸Ͳ͜ʁ 19
20. ARͷܕม׵ AR/AM::Type (DBʹΑͬͯएׯҟͳΔ) 20
21. Ϣʔβʔೖྗͷม׵ #cast DBͷ஋ʹม׵ #serialize DBͷ஋͔ΒRubyΦϒδΣΫτʹม׵ #deserialize Typeͷऔಘ 21
22. ARͷܕม׵ ΧϥϜຖʹType 22 ͜ΕʹΑΓɺܕม׵͕ߦΘΕΔ
23. Attributes APIͱ͸ ARͷܕม׵ʹϑοΫ͢ΔAPI User Record DB 23
24. Attributes APIͱ͸ ARͷܕม׵ʹϑοΫ͢ΔAPI User Record DB age: integer owner: boolean; false schema 24
25. Attributes APIͱ͸ ARͷܕม׵ʹϑοΫ͢ΔAPI User Record DB age: integer owner: boolean; false schema Attributes API 25
26. Attributes APIͱ͸ ARͷܕม׵ʹϑοΫ͢ΔAPI User Record DB age: string owner: boolean; true schema Attributes API 26
27. Attributes APIͱ͸ ίʔυʹ͢Δͱ͜͏ͳΔ ܕม׵ΛมߋͰ͖Δ 27
28. ׆༻ํ๏͸ ޙ൒ͷ࣮ફฤʹͯ 28
29. • Attributes APIͱ͸ • Attributes APIྺ࢙ • ࣮ફྫ ࿩͢͜ͱ 29
30. Attributes APIྺ࢙ Rails 4.2.0 ARʹAttributes APIొ৔ private API ܕม׵·ΘΓͷϦϑΝΫλϦϯά 30
31. Attributes APIྺ࢙ Rails 5.0.0 public APIԽ 31
32. Attributes APIྺ࢙ Rails 5.2.0 ɾActiveModelʹAttributes API ɾ·ͩprivate API ɾdirty/ivarͱͷޓ׵ੑ" ɾpublic APIʹͳΔͷ͸Rails7(?) 32
33. Attributes APIྺ࢙ ActiveModel::Attributes AMͰܕΛࢦఆͰ͖ΔΑ͏ʹͳͬͨ 33
34. Attributes APIྺ࢙ alpaca-tc/active_model_attributes_backport ~5.1Ͱ΋ɺ΄΅࢖͑·͢ 34
35. Attributes APIྺ࢙ 35
36. Attributes APIྺ࢙ Private APIͳͷͰࣗݾ੹೚Ͱ 36
37. • Attributes APIͱ͸ • Attributes APIྺ࢙ • ࣮ફฤ ࿩͢͜ͱ 37
38. ࣮ફฤ Attributes API ࢖͍ํ ศརͳ׆༻ํ๏Λ঺հ 38
39. ᶃܕͷࢦఆ ࣮ફฤ 39
40. ೚ҙͷܕΛࢦఆ ActiveModelͩͱಛʹخ͍͠ ☺ ࣮ફฤ 40 ᶃܕͷࢦఆ
41. ᶄσϑΥϧτ஋ͷઃఆ ࣮ફฤ 41
42. ᶄσϑΥϧτ஋ͷઃఆ ࣮ફฤ DBҎ֎ͷॳظ஋ΛઃఆͰ͖Δ Ruby WorldͰಈతͳ஋Λઃఆ after_initializeͰͷॳظԽ͕ෆཁʹͳΔ 42
43. ᶅԾ૝ଐੑ ࣮ફฤ 43
44. ᶅԾ૝ଐੑ ࣮ફฤ DBʹΧϥϜͷଘࡏ͠ͳ͍ΞΫηα attr_accessor+ܕͷΑ͏ͳ࢖͍ํ ঝ୚νΣοΫϘοΫεͳͲ AttributeMethods΋࢖͑Δ 44
45. ᶆಠࣗΩϟετ Attributes APIͰಠࣗͷܕΛࢦఆͰ͖Δ ࣮ફฤ 45 AM::Type::ValueΛܧঝͨ͠ΫϥεΛఆٛ
46. ࣮ફฤ ࢖͏ଆ 46 Symbol ͔ ΠϯελϯεΛ౉͢ ॳظԽͷҾ਺΋౉ͤΔ
47. ྫ: ి࿩൪߸ ࣮ફฤ ਺஋Ҏ֎ͷ஋Λ࡟আ͍ͨ͠ 47
48. ࣮ફฤ ਺஋Ҏ֎Λফ͢จࣈܕΛొ࿥ 48
49. ࣮ફฤ Attribute APIͰܕΛ্ॻ͖͢Δ 49
50. ᶆಠࣗΩϟετ ܕɾܗࣜΛએݴతʹॻ͚Δ ࣮ફฤ before_validationͷ੔ܗॲཧ͕ཁΒͳ͍ 50
51. ᶇ҉߸Խ DB<=>ARͰՄٯ҉߸Λ͍ͨ͠ ࣮ફฤ 51
52. ݸਓ৘ใɾձࣾͷൿಗ৘ใ ηΩϡϦςΟ͕େࣄ ࣮ફฤ 52
53. Attributes APIͳΒ… ࣮ફฤ 53
54. ࣮ફฤ ҉߸Խɾෳ߹Խ 54
55. alpaca-tc/active_record_encryption ࣮ફฤ 55 Attribute APIʹΑͬͯ ҉߸Խ/෮߸ԽΛӅṭ 55
56. ৽نࣄۀʹಋೖத ࣮ફฤ 56
57. Attributes API͸݁ߏศར ActiveModelʹ΋ೖΓɺར༻γʔϯ͕૿͑ͨ ·ͱΊ ͥͻ͝ར༻͍ͩ͘͞ 57 ׆༻ํ๏͸ݟ͖͑ͯ·͔ͨ͠ ʁ