バリデーション付きフォームを宣言的に実装する / Declaratively Implementing a Form with Validation

1. όϦσʔγϣϯ෇͖ϑΥʔϜΛ એݴతʹ࣮૷͢Δ 2024/5/31(Fri) Mobile Act OSAKA 13
2. αϯϓϧίʔυ IUUQTHJUIVCDPNTUVEJPSPPLFSZ7BMJEBUJPO'PSN4BNQMF
3. ͱ͋ΔϓϩδΣΫτʹͯ
4. Α͋͘ΔϑΥʔϜը໘
5. Α͋͘ΔϑΥʔϜը໘ ̍ʙจࣈҎ಺ બ୒ඞਢ ̍ʙจࣈҎ಺ ৗʹԡͤΔ
6. Α͋͘ΔϑΥʔϜը໘ ৚݅Λຬ͍ͨͯ͠ͳ͍ঢ়ଶͰԡ͢ͱ
7. Α͋͘ΔϑΥʔϜը໘ Τϥʔঢ়ଶʹͳΓ
   Τϥʔϝοηʔδ͕දࣔ͞ΕΔ
8. Α͋͘ΔϑΥʔϜը໘ ஋Λม͑Δͱ࿮͸ফ͑ͯ
   Τϥʔϝοηʔδ͚͕ͩ࢒Δ
9. Α͋͘ΔϑΥʔϜը໘ ৚݅Λຬ͍ͨͯ͠Δঢ়ଶͰԡ͢ͱ
10. Α͋͘ΔϑΥʔϜը໘ Τϥʔ͕ফ͑Δ
11. ॴײ w ಛผ೉͘͠͸ͳ͍
    w Ͱ΋ͪΐͬͱ໘౗
    w Ϣʔβʔʹͱͬͯ͸࢖͍΍ͦ͢͏
12. Ұͭେ͖ͳ໰୊͕ʂ
13. ͜͏͍͏ը໘
    PS
    ίϯϙʔωϯτ͕
    dը໘΄Ͳ͋Δ ͔ͳΓେ͖ΊͷϓϩδΣΫτͰͨ͠
14. ۪௚ʹ࣮૷͢Δͱʜ w ਓʹΑ࣮ͬͯ૷ʹ͹Β͖͕ͭੜͦ͡͏
    w ΋ͬͱ೉͍͠ը໘͕ଞʹ΋͋ΔͷͰ͜͜Ͱۤ࿑ͯ͠Δ৔߹Ͱ͸ͳ͍
15. ্ख͍΍ΓํΛߟ͑Ͷ͹ʂ
16. ຊൃදͷ಺༰ w ࣅͨΑ͏ͳը໘Λେྔʹ࡞ΔࡍͷઃܭΛͲ͏ߟ͔͑ͨ
17. ཧ૝ͷܗΛߟ͑Δ w ਓʹΑ࣮ͬͯ૷͕όϥόϥʹͳΔͷ͸ආ͚͍ͨ
    w ͱ͸͍͑࠷ॳ͔Βཧ૝ͷܗΛ࡞Δͷ͸೉͍͠
    w ͳͷͰҰ୴۪௚ʹ࣮૷ͯ͠Έͯஈ֊తʹվળ͍ͯ͘͠
18. લఏ৚݅ w 4XJGU6*
    Ͱ͢
    w J04
    
    Λର৅ͱ͍ͯ͠·ͨ͠ʢ౰࣌ʣ
    w "OESPJE
    ൛͸ଘࡏ͠·ͤΜ
19. ͜ΕʹόϦσʔγϣϯॲཧΛ଍͍ͯ͘͠ struct RegisterView: View { @State var id = "" @State var password = "" @State var favoriteFruit: Fruit? var body: some View { ScrollView { VStack(spacing: 16) { MyTextField(name: "ID", text: $id) MyTextField(name: "PW", text: $password) FruitPicker(name: "޷͖ͳϑϧʔπ", selection: $favoriteFruit) Button("ొ࿥") { } .buttonStyle(.myButtonStyle) } .padding() } } }
20. ·ͣ͸ঢ়ଶ͔Βߟ͑Δ struct RegisterView: View { @State var id = "" @State var password = "" @State var favoriteFruit: Fruit? var body: some View { ScrollView { VStack(spacing: 16) { MyTextField(name: "ID", text: $id) MyTextField(name: "PW", text: $password) FruitPicker(name: "޷͖ͳϑϧʔπ", selection: $favoriteFruit) Button("ొ࿥") { } .buttonStyle(.myButtonStyle) } .padding() } } }
21. ͓͞Β͍ w Τϥʔ͕ൃੜ͢Δͱ੺࿮
    
    ΤϥʔϝοηʔδΛදࣔ
    w ஋͕มΘΔͱ੺࿮͚ͩফ͑Δ
22. ͜Ε͕ @State var id = “"
23. ͜͏ͳΔ @State var id = “" @State var idErrorMessage: String? @State var isIDErrorActive = false
24. ͜͏ͳΔ @State var id = “" @State var idErrorMessage: String? @State var isIDErrorActive = false Τϥʔϝοηʔδͷ༗ແΛද͢
    OJM
    ͳΒΤϥʔϝοηʔδͳ͠
    TPNF
    ͳΒΤϥʔϝοηʔδ͋Γ
25. ͜͏ͳΔ @State var id = “" @State var idErrorMessage: String? @State var isIDErrorActive = false ࿮ઢͷ༗ແΛද͢
26. ͜͏ͳΔ @State var id = “" @State var idErrorMessage: String? @State var isIDErrorActive = false ϑΟʔϧυʹ͖ͭม਺͕ඞཁʂ
27. ͭ·Γ͜Ε͕ @State var id = "" @State var password = "" @State var favoriteFruit: Fruit?
28. ͜͏ͳΔ @State var id = "" @State var idErrorMessage: String? @State var isIDErrorActive = false @State var password = "" @State var passwordErrorMessage: String? @State var isPasswordErrorActive = false @State var favoriteFruit: Fruit? @State var favoriteFruitErrorMessage: String? @State var isFavoriteFruitErrorActive = false
29. ͜͏ͳΔ @State var id = "" @State var idErrorMessage: String? @State var isIDErrorActive = false @State var password = "" @State var passwordErrorMessage: String? @State var isPasswordErrorActive = false @State var favoriteFruit: Fruit? @State var favoriteFruitErrorMessage: String? @State var isFavoriteFruitErrorActive = false ͢Ͱʹେมͦ͏͚ͩͲ
    ·ͣ͸۪௚ʹ࡞ΔͷͰ͜ΕͰਐΊΔ
30. ࣍͸όϦσʔγϣϯͷॲཧ
31. func register() { idErrorMessage = nil isIDErrorActive = false passwordErrorMessage = nil isPasswordErrorActive = false favoriteFruitErrorMessage = nil isFavoriteFruitErrorActive = false if id.isEmpty || id.count > 20 { idErrorMessage = "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isIDErrorActive = true } if password.isEmpty || password.count > 20 { passwordErrorMessage = "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isPasswordErrorActive = true } if favoriteFruit == nil { favoriteFruitErrorMessage = "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" isFavoriteFruitErrorActive = true } if isIDErrorActive || isPasswordErrorActive || isFavoriteFruitErrorActive { return } let request = RegisterRequest( id: id, password: password, favoriteFruit: favoriteFruit! ) Task { await API.send(request) } }
32. func register() { idErrorMessage = nil isIDErrorActive = false passwordErrorMessage = nil isPasswordErrorActive = false favoriteFruitErrorMessage = nil isFavoriteFruitErrorActive = false if id.isEmpty || id.count > 20 { idErrorMessage = "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isIDErrorActive = true } if password.isEmpty || password.count > 20 { passwordErrorMessage = "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isPasswordErrorActive = true } if favoriteFruit == nil { favoriteFruitErrorMessage = "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" isFavoriteFruitErrorActive = true } if isIDErrorActive || isPasswordErrorActive || isFavoriteFruitErrorActive { return } let request = RegisterRequest( id: id, password: password, favoriteFruit: favoriteFruit! ) Task { await API.send(request) } } Τϥʔͷঢ়ଶΛϦηοτ
33. func register() { idErrorMessage = nil isIDErrorActive = false passwordErrorMessage = nil isPasswordErrorActive = false favoriteFruitErrorMessage = nil isFavoriteFruitErrorActive = false if id.isEmpty || id.count > 20 { idErrorMessage = "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isIDErrorActive = true } if password.isEmpty || password.count > 20 { passwordErrorMessage = "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isPasswordErrorActive = true } if favoriteFruit == nil { favoriteFruitErrorMessage = "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" isFavoriteFruitErrorActive = true } if isIDErrorActive || isPasswordErrorActive || isFavoriteFruitErrorActive { return } let request = RegisterRequest( id: id, password: password, favoriteFruit: favoriteFruit! ) Task { await API.send(request) } } όϦσʔγϣϯΛύε͠ͳ͚Ε͹Τϥʔঢ়ଶʹ͢Δ
34. func register() { idErrorMessage = nil isIDErrorActive = false passwordErrorMessage = nil isPasswordErrorActive = false favoriteFruitErrorMessage = nil isFavoriteFruitErrorActive = false if id.isEmpty || id.count > 20 { idErrorMessage = "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isIDErrorActive = true } if password.isEmpty || password.count > 20 { passwordErrorMessage = "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isPasswordErrorActive = true } if favoriteFruit == nil { favoriteFruitErrorMessage = "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" isFavoriteFruitErrorActive = true } if isIDErrorActive || isPasswordErrorActive || isFavoriteFruitErrorActive { return } let request = RegisterRequest( id: id, password: password, favoriteFruit: favoriteFruit! ) Task { await API.send(request) } } શ෦ύε͚ͨ࣌ͩ͠
    "1*
    Λ౤͛Δ
35. ࣍͸஋͕มΘͬͨ࣌ʹ
    Τϥʔͷ࿮ΛऔΓআ͘ॲཧ
36. ͜ΕΛ @State var id = ""
37. ͜͏͢Δ @State var id = "" { didSet { isIDErrorActive = false } }
38. ࢒೦Ͱ͕͢
    !4UBUF
    ͷ
    EJE4FU
    ͸ಈ͖·ͤΜ
39. PO$IBOHF
    Λ࢖͏
40. ͜Ε͕ MyTextField(name: "ID", text: $id) MyTextField(name: "PW", text: $password) FruitPicker(name: "޷͖ͳϑϧʔπ", selection: $favoriteFruit)
41. ͜͏ͳΔ MyTextField(name: "ID", text: $id) .onChange(of: id) { _ in isIDErrorActive = false } MyTextField(name: "PW", text: $password) .onChange(of: password) { _ in isPasswordErrorActive = false } FruitPicker(name: "޷͖ͳϑϧʔπ", selection: $favoriteFruit) .onChange(of: favoriteFruit) { _ in isFavoriteFruitErrorActive = false }
42. ͋ͱ͸Τϥʔͷ
    6*
    Λදࣔ͢Δ ͚ͩ
43. .PEJ fi FS
    ʹΤϥʔঢ়ଶΛ౉͚ͩ͢ MyTextField(name: "ID", text: $id) .errorStyled(isActive: isIDErrorActive, errorMessage: idErrorMessage) .onChange(of: id) { _ in isIDErrorActive = false } MyTextField(name: "PW", text: $password) .errorStyled(isActive: isPasswordErrorActive, errorMessage: passwordErrorMessage) .onChange(of: password) { _ in isPasswordErrorActive = false } FruitPicker(name: "޷͖ͳϑϧʔπ", selection: $favoriteFruit) .errorStyled(isActive: isFavoriteFruitErrorActive, errorMessage: favoriteFruitErrorMessage) .onChange(of: favoriteFruit) { _ in isFavoriteFruitErrorActive = false } ৄࡉ͸ׂѪ
44. ؾʹͳΔͱ͜ΖͩΒ͚͕ͩ
    ͱΓ͋͑ͣͰ͖ͨ
45. struct RegisterView: View { @State var id = "" @State var idErrorMessage: String? @State var isIDErrorActive = false @State var password = "" @State var passwordErrorMessage: String? @State var isPasswordErrorActive = false @State var favoriteFruit: Fruit? @State var favoriteFruitErrorMessage: String? @State var isFavoriteFruitErrorActive = false var body: some View { ScrollView { VStack(spacing: 16) { MyTextField(name: "ID", text: $id) .errorStyled(isActive: isIDErrorActive, errorMessage: idErrorMessage) .onChange(of: id) { _ in isIDErrorActive = false } MyTextField(name: "PW", text: $password) .errorStyled(isActive: isPasswordErrorActive, errorMessage: passwordErrorMessage) .onChange(of: password) { _ in isPasswordErrorActive = false } FruitPicker(name: "޷͖ͳϑϧʔπ", selection: $favoriteFruit) .errorStyled(isActive: isFavoriteFruitErrorActive, errorMessage: favoriteFruitErrorMessage) .onChange(of: favoriteFruit) { _ in isFavoriteFruitErrorActive = false } Button("ొ࿥") { register() } .buttonStyle(.myButtonStyle) } .padding() } } func register() { idErrorMessage = nil isIDErrorActive = false passwordErrorMessage = nil isPasswordErrorActive = false favoriteFruitErrorMessage = nil isFavoriteFruitErrorActive = false if id.isEmpty || id.count > 20 { idErrorMessage = "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isIDErrorActive = true } if password.isEmpty || password.count > 20 { passwordErrorMessage = "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isPasswordErrorActive = true } if favoriteFruit == nil { favoriteFruitErrorMessage = "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" isFavoriteFruitErrorActive = true } if isIDErrorActive || isPasswordErrorActive || isFavoriteFruitErrorActive { return } let request = RegisterRequest( id: id, password: password, favoriteFruit: favoriteFruit! ) Task { await API.send(request) } } }
46. w ποίϛͲ͜Ζ͸͋Δ͕ϑΥʔϜܥͷը໘͕ ը໘͙Β͍ͳΒେ͖ͳ໰ ୊ʹ͸ͳΒͳͦ͞͏
    w ͔͠͠ࠓճ͸ͱʹ͔͘਺͕ଟ͍ͷͰ਺͕ଟ͘ͳͬͯ΋͍͍Α͏ʹؤுΔ
47. ؾʹͳΔϙΠϯτ
    ʮ7JFX
    ʹϕλ͕͖͍ͯ͠Δʯ
48. struct RegisterView_ver1: View { @State var id = "" @State var idErrorMessage: String? @State var isIDErrorActive = false @State var password = "" @State var passwordErrorMessage: String? @State var isPasswordErrorActive = false @State var favoriteFruit: Fruit? @State var favoriteFruitErrorMessage: String? @State var isFavoriteFruitErrorActive = false var body: some View { ScrollView { VStack(spacing: 16) { MyTextField(name: "ID", text: $id) .errorStyled(isActive: isIDErrorActive, errorMessage: idErrorMessage) .onChange(of: id) { _ in isIDErrorActive = false } MyTextField(name: "PW", text: $password) .errorStyled(isActive: isPasswordErrorActive, errorMessage: passwordErrorMessage) .onChange(of: password) { _ in isPasswordErrorActive = false } FruitPicker(name: "޷͖ͳϑϧʔπ", selection: $favoriteFruit) .errorStyled(isActive: isFavoriteFruitErrorActive, errorMessage: favoriteFruitErrorMessage) .onChange(of: favoriteFruit) { _ in isFavoriteFruitErrorActive = false } Button("ొ࿥") { register() } .buttonStyle(.myButtonStyle) } .padding() } } func register() { idErrorMessage = nil isIDErrorActive = false passwordErrorMessage = nil isPasswordErrorActive = false favoriteFruitErrorMessage = nil isFavoriteFruitErrorActive = false if id.isEmpty || id.count > 20 { idErrorMessage = "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isIDErrorActive = true } if password.isEmpty || password.count > 20 { passwordErrorMessage = "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isPasswordErrorActive = true } if favoriteFruit == nil { favoriteFruitErrorMessage = "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" isFavoriteFruitErrorActive = true } if isIDErrorActive || isPasswordErrorActive || isFavoriteFruitErrorActive { return } let request = RegisterRequest( id: id, password: password, favoriteFruit: favoriteFruit! ) Task { await API.send(request) } } } !4UBUF
    ଟ͗͢
    
    !4UBUF
    Λ࢖͍ͬͯΔͱςετॻ͚ͳ͍
49. struct RegisterView_ver1: View { @State var id = "" @State var idErrorMessage: String? @State var isIDErrorActive = false @State var password = "" @State var passwordErrorMessage: String? @State var isPasswordErrorActive = false @State var favoriteFruit: Fruit? @State var favoriteFruitErrorMessage: String? @State var isFavoriteFruitErrorActive = false var body: some View { ScrollView { VStack(spacing: 16) { MyTextField(name: "ID", text: $id) .errorStyled(isActive: isIDErrorActive, errorMessage: idErrorMessage) .onChange(of: id) { _ in isIDErrorActive = false } MyTextField(name: "PW", text: $password) .errorStyled(isActive: isPasswordErrorActive, errorMessage: passwordErrorMessage) .onChange(of: password) { _ in isPasswordErrorActive = false } FruitPicker(name: "޷͖ͳϑϧʔπ", selection: $favoriteFruit) .errorStyled(isActive: isFavoriteFruitErrorActive, errorMessage: favoriteFruitErrorMessage) .onChange(of: favoriteFruit) { _ in isFavoriteFruitErrorActive = false } Button("ొ࿥") { register() } .buttonStyle(.myButtonStyle) } .padding() } } func register() { idErrorMessage = nil isIDErrorActive = false passwordErrorMessage = nil isPasswordErrorActive = false favoriteFruitErrorMessage = nil isFavoriteFruitErrorActive = false if id.isEmpty || id.count > 20 { idErrorMessage = "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isIDErrorActive = true } if password.isEmpty || password.count > 20 { passwordErrorMessage = "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isPasswordErrorActive = true } if favoriteFruit == nil { favoriteFruitErrorMessage = "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" isFavoriteFruitErrorActive = true } if isIDErrorActive || isPasswordErrorActive || isFavoriteFruitErrorActive { return } let request = RegisterRequest( id: id, password: password, favoriteFruit: favoriteFruit! ) Task { await API.send(request) } } } ϨΠΞ΢τͷίʔυͱൺ΂Δͱ
    όϦσʔγϣϯॲཧ௕͗͢
50. ͜ͷ఺͸
    7JFX
    ʹॻ͔ͳ͍ͱ ͍͚ͳ͍ॲཧͰ͸ͳ͍
51. .PEFM
    ΁Ҡಈ͢Δ
52. TUSVDU
    Λ༻ҙ struct RegisterForm { } struct RegisterView: View { @State var id = "" @State var idErrorMessage: String? @State var isIDErrorActive = false @State var password = "" @State var passwordErrorMessage: String? @State var isPasswordErrorActive = false @State var favoriteFruit: Fruit? @State var favoriteFruitErrorMessage: String? @State var isFavoriteFruitErrorActive = false var body: some View { ScrollView { VStack(spacing: 16) { MyTextField(name: "ID", text: $id) .errorStyled(isActive: isIDErrorActive, errorMessage: idErrorMessage) .onChange(of: id) { _ in isIDErrorActive = false } MyTextField(name: "PW", text: $password) .errorStyled(isActive: isPasswordErrorActive, errorMessage: passwordErrorMessage) .onChange(of: password) { _ in isPasswordErrorActive = false } FruitPicker(name: "޷͖ͳϑϧʔπ", selection: $favoriteFruit) .errorStyled(isActive: isFavoriteFruitErrorActive, errorMessage: favoriteFruitErrorMessage) .onChange(of: favoriteFruit) { _ in isFavoriteFruitErrorActive = false } Button("ొ࿥") { register() } .buttonStyle(.myButtonStyle) } .padding() } } func register() { idErrorMessage = nil isIDErrorActive = false passwordErrorMessage = nil isPasswordErrorActive = false favoriteFruitErrorMessage = nil isFavoriteFruitErrorActive = false if id.isEmpty || id.count > 20 { idErrorMessage = "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isIDErrorActive = true } if password.isEmpty || password.count > 20 { passwordErrorMessage = "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isPasswordErrorActive = true } if favoriteFruit == nil { favoriteFruitErrorMessage = "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" isFavoriteFruitErrorActive = true } if isIDErrorActive || isPasswordErrorActive || isFavoriteFruitErrorActive { return } let request = RegisterRequest( id: id, password: password, favoriteFruit: favoriteFruit! ) Task { await API.send(request) } } }
53. ͜ͷ෦෼Λ struct RegisterForm { } struct RegisterView_ver1: View { @State var id = "" @State var idErrorMessage: String? @State var isIDErrorActive = false @State var password = "" @State var passwordErrorMessage: String? @State var isPasswordErrorActive = false @State var favoriteFruit: Fruit? @State var favoriteFruitErrorMessage: String? @State var isFavoriteFruitErrorActive = false var body: some View { ScrollView { VStack(spacing: 16) { MyTextField(name: "ID", text: $id) .errorStyled(isActive: isIDErrorActive, errorMessage: idErrorMessage) .onChange(of: id) { _ in isIDErrorActive = false } MyTextField(name: "PW", text: $password) .errorStyled(isActive: isPasswordErrorActive, errorMessage: passwordErrorMessage) .onChange(of: password) { _ in isPasswordErrorActive = false } FruitPicker(name: "޷͖ͳϑϧʔπ", selection: $favoriteFruit) .errorStyled(isActive: isFavoriteFruitErrorActive, errorMessage: favoriteFruitErrorMessage) .onChange(of: favoriteFruit) { _ in isFavoriteFruitErrorActive = false } Button("ొ࿥") { register() } .buttonStyle(.myButtonStyle) } .padding() } } func register() { idErrorMessage = nil isIDErrorActive = false passwordErrorMessage = nil isPasswordErrorActive = false favoriteFruitErrorMessage = nil isFavoriteFruitErrorActive = false if id.isEmpty || id.count > 20 { idErrorMessage = "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isIDErrorActive = true } if password.isEmpty || password.count > 20 { passwordErrorMessage = "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isPasswordErrorActive = true } if favoriteFruit == nil { favoriteFruitErrorMessage = "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" isFavoriteFruitErrorActive = true } if isIDErrorActive || isPasswordErrorActive || isFavoriteFruitErrorActive { return } let request = RegisterRequest( id: id, password: password, favoriteFruit: favoriteFruit! ) Task { await API.send(request) } } }
54. Ҡಈ struct RegisterForm { @State var id = "" @State var idErrorMessage: String? @State var isIDErrorActive = false @State var password = "" @State var passwordErrorMessage: String? @State var isPasswordErrorActive = false @State var favoriteFruit: Fruit? @State var favoriteFruitErrorMessage: String? @State var isFavoriteFruitErrorActive = false } struct RegisterView_ver1: View { var body: some View { ScrollView { VStack(spacing: 16) { MyTextField(name: "ID", text: $id) .errorStyled(isActive: isIDErrorActive, errorMessage: idErrorMessage) .onChange(of: id) { _ in isIDErrorActive = false } MyTextField(name: "PW", text: $password) .errorStyled(isActive: isPasswordErrorActive, errorMessage: passwordErrorMessage) .onChange(of: password) { _ in isPasswordErrorActive = false } FruitPicker(name: "޷͖ͳϑϧʔπ", selection: $favoriteFruit) .errorStyled(isActive: isFavoriteFruitErrorActive, errorMessage: favoriteFruitErrorMessage) .onChange(of: favoriteFruit) { _ in isFavoriteFruitErrorActive = false } Button("ొ࿥") { register() } .buttonStyle(.myButtonStyle) } .padding() } } func register() { idErrorMessage = nil isIDErrorActive = false passwordErrorMessage = nil isPasswordErrorActive = false favoriteFruitErrorMessage = nil isFavoriteFruitErrorActive = false if id.isEmpty || id.count > 20 { idErrorMessage = "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isIDErrorActive = true } if password.isEmpty || password.count > 20 { passwordErrorMessage = "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isPasswordErrorActive = true } if favoriteFruit == nil { favoriteFruitErrorMessage = "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" isFavoriteFruitErrorActive = true } if isIDErrorActive || isPasswordErrorActive || isFavoriteFruitErrorActive { return } let request = RegisterRequest( id: id, password: password, favoriteFruit: favoriteFruit! ) Task { await API.send(request) } } }
55. ͜ͷ෦෼Λ struct RegisterForm { @State var id = "" @State var idErrorMessage: String? @State var isIDErrorActive = false @State var password = "" @State var passwordErrorMessage: String? @State var isPasswordErrorActive = false @State var favoriteFruit: Fruit? @State var favoriteFruitErrorMessage: String? @State var isFavoriteFruitErrorActive = false } struct RegisterView_ver1: View { var body: some View { ScrollView { VStack(spacing: 16) { MyTextField(name: "ID", text: $id) .errorStyled(isActive: isIDErrorActive, errorMessage: idErrorMessage) .onChange(of: id) { _ in isIDErrorActive = false } MyTextField(name: "PW", text: $password) .errorStyled(isActive: isPasswordErrorActive, errorMessage: passwordErrorMessage) .onChange(of: password) { _ in isPasswordErrorActive = false } FruitPicker(name: "޷͖ͳϑϧʔπ", selection: $favoriteFruit) .errorStyled(isActive: isFavoriteFruitErrorActive, errorMessage: favoriteFruitErrorMessage) .onChange(of: favoriteFruit) { _ in isFavoriteFruitErrorActive = false } Button("ొ࿥") { register() } .buttonStyle(.myButtonStyle) } .padding() } } func register() { idErrorMessage = nil isIDErrorActive = false passwordErrorMessage = nil isPasswordErrorActive = false favoriteFruitErrorMessage = nil isFavoriteFruitErrorActive = false if id.isEmpty || id.count > 20 { idErrorMessage = "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isIDErrorActive = true } if password.isEmpty || password.count > 20 { passwordErrorMessage = "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isPasswordErrorActive = true } if favoriteFruit == nil { favoriteFruitErrorMessage = "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" isFavoriteFruitErrorActive = true } if isIDErrorActive || isPasswordErrorActive || isFavoriteFruitErrorActive { return } let request = RegisterRequest( id: id, password: password, favoriteFruit: favoriteFruit! ) Task { await API.send(request) } } }
56. Ҡಈ struct RegisterForm { @State var id = "" @State var idErrorMessage: String? @State var isIDErrorActive = false @State var password = "" @State var passwordErrorMessage: String? @State var isPasswordErrorActive = false @State var favoriteFruit: Fruit? @State var favoriteFruitErrorMessage: String? @State var isFavoriteFruitErrorActive = false func register() -> RegisterRequest? { idErrorMessage = nil isIDErrorActive = false passwordErrorMessage = nil isPasswordErrorActive = false favoriteFruitErrorMessage = nil isFavoriteFruitErrorActive = false if id.isEmpty || id.count > 20 { idErrorMessage = "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isIDErrorActive = true } if password.isEmpty || password.count > 20 { passwordErrorMessage = "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isPasswordErrorActive = true } if favoriteFruit == nil { favoriteFruitErrorMessage = "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" isFavoriteFruitErrorActive = true } if isIDErrorActive || isPasswordErrorActive || isFavoriteFruitErrorActive { return nil } let request = RegisterRequest( id: id, password: password, favoriteFruit: favoriteFruit! ) return request } } struct RegisterView_ver1: View { var body: some View { ScrollView { VStack(spacing: 16) { MyTextField(name: "ID", text: $id) .errorStyled(isActive: isIDErrorActive, errorMessage: idErrorMessage) .onChange(of: id) { _ in isIDErrorActive = false } MyTextField(name: "PW", text: $password) .errorStyled(isActive: isPasswordErrorActive, errorMessage: passwordErrorMessage) .onChange(of: password) { _ in isPasswordErrorActive = false } FruitPicker(name: "޷͖ͳϑϧʔπ", selection: $favoriteFruit) .errorStyled(isActive: isFavoriteFruitErrorActive, errorMessage: favoriteFruitErrorMessage) .onChange(of: favoriteFruit) { _ in isFavoriteFruitErrorActive = false } Button("ొ࿥") { register() } .buttonStyle(.myButtonStyle) } .padding() } } func register() { Task { await API.send(request) } } }
57. !4UBUF
    ͸ෆཁ struct RegisterForm { @State var id = "" @State var idErrorMessage: String? @State var isIDErrorActive = false @State var password = "" @State var passwordErrorMessage: String? @State var isPasswordErrorActive = false @State var favoriteFruit: Fruit? @State var favoriteFruitErrorMessage: String? @State var isFavoriteFruitErrorActive = false } struct RegisterForm { var id = "" var idErrorMessage: String? var isIDErrorActive = false var password = "" var passwordErrorMessage: String? var isPasswordErrorActive = false var favoriteFruit: Fruit? var favoriteFruitErrorMessage: String? var isFavoriteFruitErrorActive = false }
58. EJE4FU
    ͕࢖͑ΔΑ͏ʹͳͬͨ struct RegisterForm { var id = "" { didSet { guard id != oldValue else { return } isIDErrorActive = false } } var password = "" { didSet { guard password != oldValue else { return } isPasswordErrorActive = false } } var favoriteFruit: Fruit? { didSet { guard favoriteFruit != oldValue else { return } isFavoriteFruitErrorActive = false } } } struct RegisterForm { var id = "" var idErrorMessage: String? var isIDErrorActive = false var password = "" var passwordErrorMessage: String? var isPasswordErrorActive = false var favoriteFruit: Fruit? var favoriteFruitErrorMessage: String? var isFavoriteFruitErrorActive = false }
59. EJE4FU
    ͕࢖͑ΔΑ͏ʹͳͬͨ MyTextField(name: "ID", text: $id) .errorStyled(isActive: isIDErrorActive, errorMessage: idErrorMessage) .onChange(of: id) { _ in isIDErrorActive = false } MyTextField(name: "PW", text: $password) .errorStyled(isActive: isPasswordErrorActive, errorMessage: passwordErrorMessage) .onChange(of: password) { _ in isPasswordErrorActive = false } FruitPicker(name: "޷͖ͳϑϧʔπ", selection: $favoriteFruit) .errorStyled(isActive: isFavoriteFruitErrorActive, errorMessage: favoriteFruitErrorMessage) .onChange(of: favoriteFruit) { _ in isFavoriteFruitErrorActive = false } MyTextField(name: "ID", text: $id) .errorStyled(isActive: isIDErrorActive, errorMessage: idErrorM MyTextField(name: "PW", text: $password) .errorStyled(isActive: isPasswordErrorActive, errorMessage: pa FruitPicker(name: "޷͖ͳϑϧʔπ", selection: $favoriteFruit) .errorStyled(isActive: isFavoriteFruitErrorActive, errorMessag
60. ͭ·Γ͜Ε͕ struct RegisterView: View { @State var id = "" @State var idErrorMessage: String? @State var isIDErrorActive = false @State var password = "" @State var passwordErrorMessage: String? @State var isPasswordErrorActive = false @State var favoriteFruit: Fruit? @State var favoriteFruitErrorMessage: String? @State var isFavoriteFruitErrorActive = false var body: some View { ScrollView { VStack(spacing: 16) { MyTextField(name: "ID", text: $id) .errorStyled(isActive: isIDErrorActive, errorMessage: idErrorMessage) .onChange(of: id) { _ in isIDErrorActive = false } MyTextField(name: "PW", text: $password) .errorStyled(isActive: isPasswordErrorActive, errorMessage: passwordErrorMessage) .onChange(of: password) { _ in isPasswordErrorActive = false } FruitPicker(name: "޷͖ͳϑϧʔπ", selection: $favoriteFruit) .errorStyled(isActive: isFavoriteFruitErrorActive, errorMessage: favoriteFruitErrorMessage) .onChange(of: favoriteFruit) { _ in isFavoriteFruitErrorActive = false } Button("ొ࿥") { register() } .buttonStyle(.myButtonStyle) } .padding() } } func register() { idErrorMessage = nil isIDErrorActive = false passwordErrorMessage = nil isPasswordErrorActive = false favoriteFruitErrorMessage = nil isFavoriteFruitErrorActive = false if id.isEmpty || id.count > 20 { idErrorMessage = "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isIDErrorActive = true } if password.isEmpty || password.count > 20 { passwordErrorMessage = "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isPasswordErrorActive = true } if favoriteFruit == nil { favoriteFruitErrorMessage = "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" isFavoriteFruitErrorActive = true } if isIDErrorActive || isPasswordErrorActive || isFavoriteFruitErrorActive { return } let request = RegisterRequest( id: id, password: password, favoriteFruit: favoriteFruit! ) Task { await API.send(request) } } }
61. ϑΝΠϧʹ෼ׂ struct RegisterView: View { @State var form = RegisterForm() var body: some View { ScrollView { VStack(spacing: 16) { MyTextField(name: "ID", text: $form.id) .errorStyled(isActive: form.isIDErrorActive, errorMessage: form.idErrorMessage) MyTextField(name: "PW", text: $form.password) .errorStyled(isActive: form.isPasswordErrorActive, errorMessage: form.passwordErrorMessage) FruitPicker(name: "޷͖ͳϑϧʔπ", selection: $form.favoriteFruit) .errorStyled(isActive: form.isFavoriteFruitErrorActive, errorMessage: form.favoriteFruitErrorMessage) Button("ొ࿥") { register() } .buttonStyle(.myButtonStyle) } .padding() } } func register() { guard let request = form.validate() else { return } Task { await API.send(request) } } } struct RegisterForm { var id = "" { didSet { guard id != oldValue else { return } isIDErrorActive = false } } var idErrorMessage: String? var isIDErrorActive = false var password = "" { didSet { guard password != oldValue else { return } isPasswordErrorActive = false } } var passwordErrorMessage: String? var isPasswordErrorActive = false var favoriteFruit: Fruit? { didSet { guard favoriteFruit != oldValue else { return } isFavoriteFruitErrorActive = false } } var favoriteFruitErrorMessage: String? var isFavoriteFruitErrorActive = false mutating func validate() -> RegisterRequest? { idErrorMessage = nil isIDErrorActive = false passwordErrorMessage = nil isPasswordErrorActive = false favoriteFruitErrorMessage = nil isFavoriteFruitErrorActive = false if id.isEmpty || id.count > 20 { idErrorMessage = "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isIDErrorActive = true } if password.isEmpty || password.count > 20 { passwordErrorMessage = "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isPasswordErrorActive = true } if favoriteFruit == nil { favoriteFruitErrorMessage = "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" isFavoriteFruitErrorActive = true } if isIDErrorActive || isPasswordErrorActive || isFavoriteFruitErrorActive { return nil } let request = RegisterRequest( id: id, password: password, favoriteFruit: favoriteFruit! ) return request } }
62. ঢ়ଶͱϩδοΫΛ
    TUSVDU
    ΁੾Γग़ͨ͠ w 4XJGU6*
    ͷ౎߹ʹҾͬுΒΕͳ͘ͳͬͨ
    w EJE4FU
    ͕࢖͑ΔΑ͏ʹͳͬͨ
    w ςετͰ͖ΔΑ͏ʹͳͬͨ
    w 7JFX
    ͷϑΝΠϧ͸
    6*
    ͷ͜ͱ͚ͩʹूத͢Ε͹ྑ͘ͳͬͨ
    w ϑΝΠϧʹ෼͔Εͨ͜ͱʹΑͬͯݟ௨͠͸গ͠μ΢ϯʁ
    w ྫ͕؆୯ͳͷͰϝϦοτײ͡ʹ͍͔͘΋Ͱ͕࣮͢ࡍ͸ೖྗ߲໨਺͸΋ͬͱଟ ͍ͷͰײ͡ํมΘΓͦ͏
63. ؾʹͳΔϙΠϯτ
    ʮϑΟʔϧυ͝ͱʹม਺ඞཁʯ
64. struct RegisterForm { var id = "" { didSet { guard id != oldValue else { return } isIDErrorActive = false } } var idErrorMessage: String? var isIDErrorActive = false var password = "" { didSet { guard password != oldValue else { return } isPasswordErrorActive = false } } var passwordErrorMessage: String? var isPasswordErrorActive = false var favoriteFruit: Fruit? { didSet { guard favoriteFruit != oldValue else { return } isFavoriteFruitErrorActive = false } } var favoriteFruitErrorMessage: String? var isFavoriteFruitErrorActive = false }
65. struct RegisterForm { var id = "" { didSet { guard id != oldValue else { return } isIDErrorActive = false } } var idErrorMessage: String? var isIDErrorActive = false var password = "" { didSet { guard password != oldValue else { return } isPasswordErrorActive = false } } var passwordErrorMessage: String? var isPasswordErrorActive = false var favoriteFruit: Fruit? { didSet { guard favoriteFruit != oldValue else { return } isFavoriteFruitErrorActive = false } } var favoriteFruitErrorMessage: String? var isFavoriteFruitErrorActive = false } ࣅͨΑ͏ͳॲཧ
66. struct RegisterForm { var id = "" { didSet { guard id != oldValue else { return } isIDErrorActive = false } } var idErrorMessage: String? var isIDErrorActive = false var password = "" { didSet { guard password != oldValue else { return } isPasswordErrorActive = false } } var passwordErrorMessage: String? var isPasswordErrorActive = false var favoriteFruit: Fruit? { didSet { guard favoriteFruit != oldValue else { return } isFavoriteFruitErrorActive = false } } var favoriteFruitErrorMessage: String? var isFavoriteFruitErrorActive = false } ࣅͨΑ͏ͳίʔυ
    
    ॻ͘ͷ͕໘౗
67. struct RegisterForm { mutating func validate() -> RegisterRequest? { idErrorMessage = nil isIDErrorActive = false passwordErrorMessage = nil isPasswordErrorActive = false favoriteFruitErrorMessage = nil isFavoriteFruitErrorActive = false if id.isEmpty || id.count > 20 { idErrorMessage = "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isIDErrorActive = true } if password.isEmpty || password.count > 20 { passwordErrorMessage = "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isPasswordErrorActive = true } if favoriteFruit == nil { favoriteFruitErrorMessage = "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" isFavoriteFruitErrorActive = true } if isIDErrorActive || isPasswordErrorActive || isFavoriteFruitErrorActive { return nil } let request = RegisterRequest( id: id, password: password, favoriteFruit: favoriteFruit! ) return request } } ࣅͨΑ͏ͳॲཧ
    
    ௕͍
68. δΣωϦΫεΛ࢖ͬͯͭͷ
    TUSVDU
    ʹ·ͱΊΔ
69. δΣωϦοΫͳ
    TUSVDU
    Ͱඞཁͳม਺Λ·ͱΊΔ struct Field<Value: Equatable> { var wrappedValue: Value var isErrorActive = false var errorMessage: String? }
70. δΣωϦοΫͳ
    TUSVDU
    Ͱඞཁͳม਺Λ·ͱΊΔ struct Field<Value: Equatable> { var wrappedValue: Value var isErrorActive = false var errorMessage: String? } struct RegisterForm { var id = "" { didSet { guard id != oldValue else { return } isIDErrorActive = false } } var idErrorMessage: String? var isIDErrorActive = false var password = "" { didSet { guard password != oldValue else { return } isPasswordErrorActive = false } } var passwordErrorMessage: String? var isPasswordErrorActive = false var favoriteFruit: Fruit? { didSet { guard favoriteFruit != oldValue else { return } isFavoriteFruitErrorActive = false } } var favoriteFruitErrorMessage: String? var isFavoriteFruitErrorActive = false }
71. δΣωϦοΫͳ
    TUSVDU
    Ͱඞཁͳม਺Λ·ͱΊΔ struct Field<Value: Equatable> { var wrappedValue: Value var isErrorActive = false var errorMessage: String? } struct RegisterForm { var id = "" { didSet { guard id != oldValue else { return } isIDErrorActive = false } } var idErrorMessage: String? var isIDErrorActive = false var password = "" { didSet { guard password != oldValue else { return } isPasswordErrorActive = false } } var passwordErrorMessage: String? var isPasswordErrorActive = false var favoriteFruit: Fruit? { didSet { guard favoriteFruit != oldValue else { return } isFavoriteFruitErrorActive = false } } var favoriteFruitErrorMessage: String? var isFavoriteFruitErrorActive = false }
72. δΣωϦοΫͳ
    TUSVDU
    Ͱඞཁͳม਺Λ·ͱΊΔ struct Field<Value: Equatable> { var wrappedValue: Value var isErrorActive = false var errorMessage: String? } struct RegisterForm { var id = "" { didSet { guard id != oldValue else { return } isIDErrorActive = false } } var idErrorMessage: String? var isIDErrorActive = false var password = "" { didSet { guard password != oldValue else { return } isPasswordErrorActive = false } } var passwordErrorMessage: String? var isPasswordErrorActive = false var favoriteFruit: Fruit? { didSet { guard favoriteFruit != oldValue else { return } isFavoriteFruitErrorActive = false } } var favoriteFruitErrorMessage: String? var isFavoriteFruitErrorActive = false }
73. δΣωϦοΫͳ
    TUSVDU
    Ͱඞཁͳม਺Λ·ͱΊΔ struct Field<Value: Equatable> { var wrappedValue: Value { didSet { guard wrappedValue != oldValue else { return } isErrorActive = false } } var isErrorActive = false var errorMessage: String? } struct RegisterForm { var id = "" { didSet { guard id != oldValue else { return } isIDErrorActive = false } } var idErrorMessage: String? var isIDErrorActive = false var password = "" { didSet { guard password != oldValue else { return } isPasswordErrorActive = false } } var passwordErrorMessage: String? var isPasswordErrorActive = false var favoriteFruit: Fruit? { didSet { guard favoriteFruit != oldValue else { return } isFavoriteFruitErrorActive = false } } var favoriteFruitErrorMessage: String? var isFavoriteFruitErrorActive = false }
74. ͳͷͰ͜Ε͕ struct RegisterForm { var id = "" { didSet { guard id != oldValue else { return } isIDErrorActive = false } } var idErrorMessage: String? var isIDErrorActive = false var password = "" { didSet { guard password != oldValue else { return } isPasswordErrorActive = false } } var passwordErrorMessage: String? var isPasswordErrorActive = false var favoriteFruit: Fruit? { didSet { guard favoriteFruit != oldValue else { return } isFavoriteFruitErrorActive = false } } var favoriteFruitErrorMessage: String? var isFavoriteFruitErrorActive = false }
75. ͜͏ͳΔ struct RegisterForm { var id = "" { didSet { guard id != oldValue else { return } isIDErrorActive = false } } var idErrorMessage: String? var isIDErrorActive = false var password = "" { didSet { guard password != oldValue else { return } isPasswordErrorActive = false } } var passwordErrorMessage: String? var isPasswordErrorActive = false var favoriteFruit: Fruit? { didSet { guard favoriteFruit != oldValue else { return } isFavoriteFruitErrorActive = false } } var favoriteFruitErrorMessage: String? var isFavoriteFruitErrorActive = false } struct RegisterForm { var id: Field<String> = .init(wrappedValue: “") var password: Field<String> = .init(wrappedValue: "") var favoriteFruit: Field<Fruit?> = .init(wrappedValue: nil) }
76. ͜͏ͳΔ struct RegisterForm { var id = "" { didSet { guard id != oldValue else { return } isIDErrorActive = false } } var idErrorMessage: String? var isIDErrorActive = false var password = "" { didSet { guard password != oldValue else { return } isPasswordErrorActive = false } } var passwordErrorMessage: String? var isPasswordErrorActive = false var favoriteFruit: Fruit? { didSet { guard favoriteFruit != oldValue else { return } isFavoriteFruitErrorActive = false } } var favoriteFruitErrorMessage: String? var isFavoriteFruitErrorActive = false } struct RegisterForm { var id: Field<String> = .init(wrappedValue: “") var password: Field<String> = .init(wrappedValue: "") var favoriteFruit: Field<Fruit?> = .init(wrappedValue: nil) }
77. ͱ͜ΖͰʜ
78. ͜Ε
    1SPQFSUZ8SBQQFS
    ʹͰ͖Δ΍Μʂ @propertyWrapper struct Field<Value: Equatable> { var wrappedValue: Value { didSet { guard wrappedValue != oldValue else { return } isErrorActive = false } } var isErrorActive = false var errorMessage: String? }
79. ͳͷͰ͜Ε͕ struct RegisterForm { var id: Field<String> = .init(wrappedValue: "") var password: Field<String> = .init(wrappedValue: "") var favoriteFruit: Field<Fruit?> = .init(wrappedValue: nil) }
80. ͜͏ͳΔ struct RegisterForm { var id: Field<String> = .init(wrappedValue: "") var password: Field<String> = .init(wrappedValue: "") var favoriteFruit: Field<Fruit?> = .init(wrappedValue: nil) } struct RegisterForm { @Field var id = "" @Field var password = "" @Field var favoriteFruit: Fruit? }
81. ͜Ε΋εοΩϦͤ͞Δ mutating func validate() -> RegisterRequest? { idErrorMessage = nil isIDErrorActive = false passwordErrorMessage = nil isPasswordErrorActive = false favoriteFruitErrorMessage = nil isFavoriteFruitErrorActive = false … }
82. ͜Ε΋εοΩϦͤ͞Δ @propertyWrapper struct Field<Value: Equatable> { … mutating func clearError() { isErrorActive = false errorMessage = nil } var projectedValue: Field<Value> { get { self } set { self = newValue } } } mutating func validate() -> RegisterRequest? { idErrorMessage = nil isIDErrorActive = false passwordErrorMessage = nil isPasswordErrorActive = false favoriteFruitErrorMessage = nil isFavoriteFruitErrorActive = false … }
83. ͜Ε΋εοΩϦͤ͞Δ @propertyWrapper struct Field<Value: Equatable> { … mutating func clearError() { isErrorActive = false errorMessage = nil } var projectedValue: Field<Value> { get { self } set { self = newValue } } } mutating func validate() -> RegisterRequest? { idErrorMessage = nil isIDErrorActive = false passwordErrorMessage = nil isPasswordErrorActive = false favoriteFruitErrorMessage = nil isFavoriteFruitErrorActive = false … }
84. ͜Ε΋εοΩϦͤ͞Δ mutating func validate() -> RegisterRequest? { $id.clearError() $password.clearError() $favoriteFruit.clearError() … } @propertyWrapper struct Field<Value: Equatable> { … mutating func clearError() { isErrorActive = false errorMessage = nil } var projectedValue: Field<Value> { get { self } set { self = newValue } } }
85. mutating func validate() -> RegisterRequest? { $id.clearError() $password.clearError() $favoriteFruit.clearError() … } ͜Ε΋εοΩϦͤ͞Δ @propertyWrapper struct Field<Value: Equatable> { … mutating func clearError() { isErrorActive = false errorMessage = nil } var projectedValue: Field<Value> { get { self } set { self = newValue } } }
86. εοΩϦͨ͠ mutating func validate() -> RegisterRequest? { idErrorMessage = nil isIDErrorActive = false passwordErrorMessage = nil isPasswordErrorActive = false favoriteFruitErrorMessage = nil isFavoriteFruitErrorActive = false … } mutating func validate() -> RegisterRequest? { $id.clearError() $password.clearError() $favoriteFruit.clearError() … }
87. struct RegisterForm { var id = "" { didSet { guard id != oldValue else { return } isIDErrorActive = false } } var idErrorMessage: String? var isIDErrorActive = false var password = "" { didSet { guard password != oldValue else { return } isPasswordErrorActive = false } } var passwordErrorMessage: String? var isPasswordErrorActive = false var favoriteFruit: Fruit? { didSet { guard favoriteFruit != oldValue else { return } isFavoriteFruitErrorActive = false } } var favoriteFruitErrorMessage: String? var isFavoriteFruitErrorActive = false mutating func validate() -> RegisterRequest? { idErrorMessage = nil isIDErrorActive = false passwordErrorMessage = nil isPasswordErrorActive = false favoriteFruitErrorMessage = nil isFavoriteFruitErrorActive = false if id.isEmpty || id.count > 20 { idErrorMessage = "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isIDErrorActive = true } if password.isEmpty || password.count > 20 { passwordErrorMessage = "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isPasswordErrorActive = true } if favoriteFruit == nil { favoriteFruitErrorMessage = "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" isFavoriteFruitErrorActive = true } if isIDErrorActive || isPasswordErrorActive || isFavoriteFruitErrorActive { return nil } let request = RegisterRequest( id: id, password: password, favoriteFruit: favoriteFruit! ) return request } } struct RegisterForm { @Field var id = "" @Field var password = "" @Field var favoriteFruit: Fruit? mutating func validate() -> RegisterRequest? { $id.clearError() $password.clearError() $favoriteFruit.clearError() if id.isEmpty || id.count > 20 { idErrorMessage = "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isIDErrorActive = true } if password.isEmpty || password.count > 20 { passwordErrorMessage = "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isPasswordErrorActive = true } if favoriteFruit == nil { favoriteFruitErrorMessage = "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" isFavoriteFruitErrorActive = true } if isIDErrorActive || isPasswordErrorActive || isFavoriteFruitErrorActive { return nil } let request = RegisterRequest( id: id, password: password, favoriteFruit: favoriteFruit! ) return request } }
88. ؾʹͳΔϙΠϯτ
    ʮόϦσʔγϣϯॲཧ͕৑௕ʯ
89. mutating func validate() -> RegisterRequest? { $id.clearError() $password.clearError() $favoriteFruit.clearError() if id.isEmpty || id.count > 20 { $id.errorMessage = "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" $id.isErrorActive = true } if password.isEmpty || password.count > 20 { $password.errorMessage = "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" $password.isErrorActive = true } if favoriteFruit == nil { $favoriteFruit.errorMessage = "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" $favoriteFruit.isErrorActive = true } … } ΍͍ͬͯΔ͜ͱ͸ಉ͡
    ৚݅ͱΤϥʔϝοηʔδ͕ҧ͏͚ͩ
90. mutating func validate() -> RegisterRequest? { $id.clearError() $password.clearError() $favoriteFruit.clearError() if id.isEmpty || id.count > 20 { $id.errorMessage = "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" $id.isErrorActive = true } if password.isEmpty || password.count > 20 { $password.errorMessage = "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" $password.isErrorActive = true } if favoriteFruit == nil { $favoriteFruit.errorMessage = "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" $favoriteFruit.isErrorActive = true } … } Ͱ͖Ε͹όϦσʔγϣϯ͕ύε͢Δ࣌ͷ৚݅Λॻ͖͍ͨ
91. ͦ͏͍͏ϝιουΛ࡞Δ
92. extension Field { mutating func validate(errorMessage: String, with validate: (Value) -> Bool) { if !validate(wrappedValue) { self.errorMessage = errorMessage isErrorActive = true } } }
93. extension Field { mutating func validate(errorMessage: String, with validate: (Value) -> Bool) { if !validate(wrappedValue) { self.errorMessage = errorMessage isErrorActive = true } } } ৚݅ͱΤϥʔϝοηʔδΛҾ਺Ͱ౉͢
94. extension Field { mutating func validate(errorMessage: String, with validate: (Value) -> Bool) { if !validate(wrappedValue) { self.errorMessage = errorMessage isErrorActive = true } } } όϦσʔγϣϯ͕௨Δ࣌ͷ৚݅ΛࢦఆͰ͖ΔΑ͏ʹͳͬͨ
95. ͳͷͰ͜Ε͕ if id.isEmpty || id.count > 20 { $id.errorMessage = "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" $id.isErrorActive = true } if password.isEmpty || password.count > 20 { $password.errorMessage = "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" $password.isErrorActive = true } if favoriteFruit == nil { $favoriteFruit.errorMessage = "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" $favoriteFruit.isErrorActive = true }
96. ͜͏ͳΔ $id.validate(errorMessage: "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞") { 1 <= $0.count && $0.count <= 20 } $password.validate(errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞") { 1 <= $0.count && $0.count <= 20 } $favoriteFruit.validate(errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞") { $0 != nil }
97. ͜͏ͳΔ $id.validate(errorMessage: "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞") { 1 <= $0.count && $0.count <= 20 } $password.validate(errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞") { 1 <= $0.count && $0.count <= 20 } $favoriteFruit.validate(errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞") { $0 != nil } όϦσʔγϣϯ͕ύε͢Δ৚݅Λࢦఆ͢Ε͹ྑ͍
98. ͜͏ͳΔ $id.validate(errorMessage: "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞") { 1 <= $0.count && $0.count <= 20 } $password.validate(errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞") { 1 <= $0.count && $0.count <= 20 } $favoriteFruit.validate(errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞") { $0 != nil } Τϥʔจݴͱ΋Ұக͢Δ
99. struct RegisterForm { @Field var id = "" @Field var password = "" @Field var favoriteFruit: Fruit? mutating func validate() -> RegisterRequest? { $id.clearError() $password.clearError() $favoriteFruit.clearError() if id.isEmpty || id.count > 20 { idErrorMessage = "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isIDErrorActive = true } if password.isEmpty || password.count > 20 { passwordErrorMessage = "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isPasswordErrorActive = true } if favoriteFruit == nil { favoriteFruitErrorMessage = "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" isFavoriteFruitErrorActive = true } if isIDErrorActive || isPasswordErrorActive || isFavoriteFruitErrorActive { return nil } let request = RegisterRequest( id: id, password: password, favoriteFruit: favoriteFruit! ) return request } } struct RegisterForm { @Field var id = "" @Field var password = "" @Field var favoriteFruit: Fruit? mutating func validate() -> RegisterRequest? { $id.clearError() $password.clearError() $favoriteFruit.clearError() $id.validate(errorMessage: "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞") { 1 <= $0.count && $0.count <= 20 } $password.validate(errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞") { 1 <= $0.count && $0.count <= 20 } $favoriteFruit.validateNotNil(errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞") if $id.isErrorActive || $password.isErrorActive || $favoriteFruit.isErrorActive { return nil } let request = RegisterRequest( id: id, password: password, favoriteFruit: favoriteFruit! ) return request } }
100. ؾʹͳΔϙΠϯτ
     ʮڧ੍Ξϯϥοϓ͍ͯ͠Δʯ
101. if $id.isErrorActive || $password.isErrorActive || $favoriteFruit.isErrorActive { return nil } let request = RegisterRequest( id: id, password: password, favoriteFruit: favoriteFruit! ) return request ͜Ε
102. if $id.isErrorActive || $password.isErrorActive || $favoriteFruit.isErrorActive { return nil } let request = RegisterRequest( id: id, password: password, favoriteFruit: favoriteFruit! ) return request JG
     ͰνΣοΫͯ͠Δ͔Β
     ͜ͷλΠϛϯάͰ
     OJM
     ʹͳΔ͜ͱ͸ͳ͍͸͕ͣͩ
     ҆શʹΞϯϥοϓ͍ͨ͠ͱ͜Ζ
103. HVBSE
     MFU
     Λ࢖͏
104. ͜ΕΛ extension Field { mutating func validate(errorMessage: String, with validate: (Value) -> Bool) { if !validate(wrappedValue) { self.errorMessage = errorMessage isErrorActive = true } } }
105. ͜͏͢Δ mutating func validate(errorMessage: String, with validate: (Value) -> Bool) -> Value? { guard validate(wrappedValue) else { self.errorMessage = errorMessage isErrorActive = true return nil } return wrappedValue } ฦΓ஋Λ௥Ճ
     ύεͨ͠Β
     TPNF
     /(
     ͳΒ
     OJM
     Λฦ͢
106. ͳͷͰ͜Ε͕ $id.validate(errorMessage: "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞") { 1 <= $0.count && $0.count <= 20 } $password.validate(errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞") { 1 <= $0.count && $0.count <= 20 } $favoriteFruit.validate(errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞") { $0 != nil } if $id.isErrorActive || $password.isErrorActive || $favoriteFruit.isErrorActive { return nil } let request = RegisterRequest( id: id, password: password, favoriteFruit: favoriteFruit! ) return request
107. ͜͏ͳͬͯ let idValue = $id.validate(errorMessage: "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞") { 1 <= $0.count && $0.count <= 20 } let passwordValue = $password.validate(errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞") { 1 <= $0.count && $0.count <= 20 } let favoriteFruitValue = $favoriteFruit.validateNotNil(errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞") if $id.isErrorActive || $password.isErrorActive || $favoriteFruit.isErrorActive { return nil } let request = RegisterRequest( id: id, password: password, favoriteFruit: favoriteFruit! ) return request
108. ͜͏ͳΔ let idValue = $id.validate(errorMessage: "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞") { 1 <= $0.count && $0.count <= 20 } let passwordValue = $password.validate(errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞") { 1 <= $0.count && $0.count <= 20 } let favoriteFruitValue = $favoriteFruit.validateNotNil(errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞") guard let idValue, let passwordValue, let favoriteFruitValue else { return nil } let request = RegisterRequest( id: idValue, password: passwordValue, favoriteFruit: favoriteFruitValue ) return request
109. ͜͏ͳΔ let idValue = $id.validate(errorMessage: "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞") { 1 <= $0.count && $0.count <= 20 } let passwordValue = $password.validate(errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞") { 1 <= $0.count && $0.count <= 20 } let favoriteFruitValue = $favoriteFruit.validateNotNil(errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞") guard let idValue, let passwordValue, let favoriteFruitValue else { return nil } let request = RegisterRequest( id: idValue, password: passwordValue, favoriteFruit: favoriteFruitValue ) return request ͕ফ͑ͨ
110. ؾʹͳΔϙΠϯτ
     ʮόϦσʔγϣϯͷهड़Λָ͍ͨ͠ʯ
111. let idValue = $id.validate(errorMessage: "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞") { 1 <= $0.count && $0.count <= 20 } let passwordValue = $password.validate(errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞") { 1 <= $0.count && $0.count <= 20 } จࣈ਺νΣοΫΛ͍ͯ͠Δ
     ৚݅͸େମಉ͡ͳͷͰ΋ͬͱָ͍ͨ͠
112. ͜͏ͨ͠Βָͦ͏ extension (String) -> Bool { static func count(isIn range: ClosedRange<Int>) -> Self { { value in range.contains(value.count) } } } let idValue = $id.validate( errorMessage: "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞", with: .count(isIn: 1 ... 20) ) ͜Μͳײ͡ʹॻ͖͍ͨ
     Λଧͭͱิ׬͕ग़ͯ͘ΔΑ͏ͳੈք
113. ͜͏ͨ͠Βָͦ͏ extension (String) -> Bool { static func count(isIn range: ClosedRange<Int>) -> Self { { value in range.contains(value.count) } } } let idValue = $id.validate( errorMessage: "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞", with: .count(isIn: 1 ... 20) ) Ҿ਺͸ΫϩʔδϟͳͷͰ
     &YUFOTJPO
     Λੜ΍ͤ͹͍͍ͷͰ͸ʁ
114. Ͱ͖·ͤΜ extension (String) -> Bool { static func count(isIn range: ClosedRange<Int>) -> Self { { value in range.contains(value.count) } } } let idValue = $id.validate( errorMessage: "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞", with: .count(isIn: 1 ... 20) ) 💥/POOPNJOBM
     UZQF
      4USJOH
     
     #PPM
     DBOOPU
     CF
     FYUFOEFE
115. TUSVDU
     Ͱϥοϓ͢Δํ๏Λ࢖͏
116. Ϋϩʔδϟ͚ͩͷ
     TUSVDU
     Λ࡞੒ struct ValidationRule<Value> { let validate: (Value) -> Bool } ͭͷΫϩʔδϟΛ࣋ͭ
     ࣮࣭ΫϩʔδϟͰ͋Δ
117. TUSVDU
     ͳΒ
     TUBUJD
     GVOD
     ͕࢖͑Δ extension ValidationRule where Value == String { static func count(isIn range: ClosedRange<Int>) -> Self { .init { value in range.contains(value.count) } } }
118. TUSVDU
     ͳΒ
     TUBUJD
     GVOD
     ͕࢖͑Δ extension ValidationRule where Value == String { static func count(isIn range: ClosedRange<Int>) -> Self { .init { value in range.contains(value.count) } } }
119. ͜ΕΛ mutating func validate(errorMessage: String, with validate: (Value) -> Bool) -> Value? { guard validate(wrappedValue) else { self.errorMessage = errorMessage isErrorActive = true return nil } return wrappedValue }
120. ͜͏͢Δ mutating func validate(errorMessage: String, with rule: ValidationRule<Value>) -> Value? { guard rule.validate(wrappedValue) else { self.errorMessage = errorMessage isErrorActive = true return nil } return wrappedValue }
121. ݟӫ͑ͷͨΊҾ਺ͷॱ൪Λม͑Δ mutating func validate(with rule: ValidationRule<Value>, errorMessage: String) -> Value? { guard rule.validate(wrappedValue) else { self.errorMessage = errorMessage isErrorActive = true return nil } return wrappedValue }
122. ͳͷͰ͜Ε͕ let idValue = $id.validate(errorMessage: "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞") { 1 <= $0.count && $0.count <= 20 } let passwordValue = $password.validate(errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞") { 1 <= $0.count && $0.count <= 20 }
123. ͜͏ͳΔ let idValue = $id.validate( with: .count(isIn: 1 ... 20), errorMessage: "ID͸1~20จࣈҎ಺ͷӳ਺ࣈͰೖྗ͍ͯͩ͘͠͞" ) let passwordValue = $password.validate( with: .count(isIn: 1 ... 20), errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) ҙਤ͕఻ΘΓ΍͘͢ͳͬͨ
     ॻ͘ͱ͖΋ͱΓ͋͑ͣ
     
     ͱଧͯ͹Կ͔͠Βิ׬͞ΕΔ
124. ৚͕݅ෳ਺͋Δ৔߹͸ʁ
125. ྫ͑͹ʮ൒֯ӳ਺ࣈͷΈͰdจࣈҎ಺ʯͷ৔߹ extension ValidationRule where Value == String { static func isOnlyAlphanumericAndCount(isIn range: ClosedRange<Int>) -> Self { .init { value in value.range(of: "[^a-zA-Z0-9]", options: .regularExpression) == nil && range.contains(value.count) } } }
126. ྫ͑͹ʮ൒֯ӳ਺ࣈͷΈͰdจࣈҎ಺ʯͷ৔߹ extension ValidationRule where Value == String { static func isOnlyAlphanumericAndCount(isIn range: ClosedRange<Int>) -> Self { .init { value in value.range(of: "[^a-zA-Z0-9]", options: .regularExpression) == nil && range.contains(value.count) } } } จࣈ਺νΣοΫ ൒֯ӳ਺ࣈͷΈͷνΣοΫ ͍͍࣮ͪͪ૷͠ͳ͍ͱ͍͚ͳ͍ʜʁ
127. 
     Ͱ߹੒͍ͨ͠ let idValue = $id.validate( with: .count(isIn: 1 ... 20) && .isOnlyAlphanumeric, errorMessage: "ID͸1~20จࣈҎ಺ͷӳ਺ࣈͰೖྗ͍ͯͩ͘͠͞" ) ͜͏͍͏;͏ʹॻ͖͍ͨ
128. ΫϩʔδϟΛ߹੒͢Δ struct ValidationRule<Value> { let validate: (Value) -> Bool static func && (_ lhs: Self, _ rhs: Self) -> Self { ValidationRule { value in lhs.validate(value) && rhs.validate(value) } } } ͭͷ
     7BMJEBUJPO3VMF
     Λड͚औΔ
129. struct ValidationRule<Value> { let validate: (Value) -> Bool static func && (_ lhs: Self, _ rhs: Self) -> Self { ValidationRule { value in lhs.validate(value) && rhs.validate(value) } } } ಺෦తʹ྆ऀͷ݁ՌΛ
     
     Ͱܨ͛Δ ΫϩʔδϟΛ߹੒͢Δ
130. struct ValidationRule<Value> { let validate: (Value) -> Bool static func && (_ lhs: Self, _ rhs: Self) -> Self { ValidationRule { value in lhs.validate(value) && rhs.validate(value) } } } ͦͷॲཧΛ৽ͨͳ
     7BMJEBUJPO3VMF
     Ͱϥοϓ͢Δ ΫϩʔδϟΛ߹੒͢Δ
131. Ͱ͖ͨ let idValue = $id.validate( with: .count(isIn: 1 ... 20) && .isOnlyAlphanumeric, errorMessage: "ID͸1~20จࣈҎ಺ͷӳ਺ࣈͰೖྗ͍ͯͩ͘͠͞" ) ಠࣗͷϧʔϧΛ౎౓ఆٛ͢Δඞཁ͕ͳ͘ͳΔ
132. ݱ࣌఺ͷ
     3FHJTUFS'PSN
133. struct RegisterForm { @Field var id = "" @Field var password = "" @Field var favoriteFruit: Fruit? mutating func validate() -> RegisterRequest? { $id.clearError() $password.clearError() $favoriteFruit.clearError() let idValue = $id.validate( with: .count(isIn: 1 ... 20) && .isOnlyAlphanumeric, errorMessage: "ID͸1~20จࣈҎ಺ͷӳ਺ࣈͰೖྗ͍ͯͩ͘͠͞" ) let passwordValue = $password.validate( with: .count(isIn: 1 ... 20), errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) let favoriteFruitValue = $favoriteFruit.validateNotNil( errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" ) guard let idValue, let passwordValue, let favoriteFruitValue else { return nil } let request = RegisterRequest( id: idValue, password: passwordValue, favoriteFruit: favoriteFruitValue ) return request } }
134. struct RegisterForm { @Field var id = "" @Field var password = "" @Field var favoriteFruit: Fruit? mutating func validate() -> RegisterRequest? { $id.clearError() $password.clearError() $favoriteFruit.clearError() let idValue = $id.validate( with: .count(isIn: 1 ... 20) && .isOnlyAlphanumeric, errorMessage: "ID͸1~20จࣈҎ಺ͷӳ਺ࣈͰೖྗ͍ͯͩ͘͠͞" ) let passwordValue = $password.validate( with: .count(isIn: 1 ... 20), errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) let favoriteFruitValue = $favoriteFruit.validateNotNil( errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" ) guard let idValue, let passwordValue, let favoriteFruitValue else { return nil } let request = RegisterRequest( id: idValue, password: passwordValue, favoriteFruit: favoriteFruitValue ) return request } } Τϥʔͷঢ়ଶ͸
     !'JFME
     ʹؚ·Ε͍ͯΔ
135. struct RegisterForm { @Field var id = "" @Field var password = "" @Field var favoriteFruit: Fruit? mutating func validate() -> RegisterRequest? { $id.clearError() $password.clearError() $favoriteFruit.clearError() let idValue = $id.validate( with: .count(isIn: 1 ... 20) && .isOnlyAlphanumeric, errorMessage: "ID͸1~20จࣈҎ಺ͷӳ਺ࣈͰೖྗ͍ͯͩ͘͠͞" ) let passwordValue = $password.validate( with: .count(isIn: 1 ... 20), errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) let favoriteFruitValue = $favoriteFruit.validateNotNil( errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" ) guard let idValue, let passwordValue, let favoriteFruitValue else { return nil } let request = RegisterRequest( id: idValue, password: passwordValue, favoriteFruit: favoriteFruitValue ) return request } } όϦσʔγϣϯͷ৚݅͸
     ࠶ར༻
     
     ݁߹Մೳ
136. struct RegisterForm { @Field var id = "" @Field var password = "" @Field var favoriteFruit: Fruit? mutating func validate() -> RegisterRequest? { $id.clearError() $password.clearError() $favoriteFruit.clearError() let idValue = $id.validate( with: .count(isIn: 1 ... 20) && .isOnlyAlphanumeric, errorMessage: "ID͸1~20จࣈҎ಺ͷӳ਺ࣈͰೖྗ͍ͯͩ͘͠͞" ) let passwordValue = $password.validate( with: .count(isIn: 1 ... 20), errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) let favoriteFruitValue = $favoriteFruit.validateNotNil( errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" ) guard let idValue, let passwordValue, let favoriteFruitValue else { return nil } let request = RegisterRequest( id: idValue, password: passwordValue, favoriteFruit: favoriteFruitValue ) return request } } όϦσʔγϣϯ݁Ռ͸
     ΦϓγϣφϧͰड͚औΔ
137. struct RegisterForm { @Field var id = "" @Field var password = "" @Field var favoriteFruit: Fruit? mutating func validate() -> RegisterRequest? { $id.clearError() $password.clearError() $favoriteFruit.clearError() let idValue = $id.validate( with: .count(isIn: 1 ... 20) && .isOnlyAlphanumeric, errorMessage: "ID͸1~20จࣈҎ಺ͷӳ਺ࣈͰೖྗ͍ͯͩ͘͠͞" ) let passwordValue = $password.validate( with: .count(isIn: 1 ... 20), errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) let favoriteFruitValue = $favoriteFruit.validateNotNil( errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" ) guard let idValue, let passwordValue, let favoriteFruitValue else { return nil } let request = RegisterRequest( id: idValue, password: passwordValue, favoriteFruit: favoriteFruitValue ) return request } } શͯύε͚ͨ࣌ͩ͠
     3FHJTUFS3FRVFTU
     Λฦ͢
138. ࠷ॳͱݟൺ΂Δ struct RegisterForm { @Field var id = "" @Field var password = "" @Field var favoriteFruit: Fruit? mutating func validate() -> RegisterRequest? { $id.clearError() $password.clearError() $favoriteFruit.clearError() let idValue = $id.validate( with: .count(isIn: 1 ... 20) && .isOnlyAlphanumeric, errorMessage: "ID͸1~20จࣈҎ಺ͷӳ਺ࣈͰೖྗ͍ͯͩ͘͠͞" ) let passwordValue = $password.validate( with: .count(isIn: 1 ... 20), errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) let favoriteFruitValue = $favoriteFruit.validateNotNil( errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" ) guard let idValue, let passwordValue, let favoriteFruitValue else { return nil } let request = RegisterRequest( id: idValue, password: passwordValue, favoriteFruit: favoriteFruitValue ) return request } } struct RegisterForm { var id = "" { didSet { guard id != oldValue else { return } isIDErrorActive = false } } var idErrorMessage: String? var isIDErrorActive = false var password = "" { didSet { guard password != oldValue else { return } isPasswordErrorActive = false } } var passwordErrorMessage: String? var isPasswordErrorActive = false var favoriteFruit: Fruit? { didSet { guard favoriteFruit != oldValue else { return } isFavoriteFruitErrorActive = false } } var favoriteFruitErrorMessage: String? var isFavoriteFruitErrorActive = false mutating func validate() -> RegisterRequest? { idErrorMessage = nil isIDErrorActive = false passwordErrorMessage = nil isPasswordErrorActive = false favoriteFruitErrorMessage = nil isFavoriteFruitErrorActive = false if id.isEmpty || id.count > 20 { idErrorMessage = "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isIDErrorActive = true } if password.isEmpty || password.count > 20 { passwordErrorMessage = "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isPasswordErrorActive = true } if favoriteFruit == nil { favoriteFruitErrorMessage = "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" isFavoriteFruitErrorActive = true } if isIDErrorActive || isPasswordErrorActive || isFavoriteFruitErrorActive { return nil } let request = RegisterRequest( id: id, password: password, favoriteFruit: favoriteFruit! ) return request } }
139. Α͘ͳ͖ͬͯͨ
140. ΋͏গ͠೉͍͠
     έʔεΛߟ͑ͯΈΔ
141. ϓϩϑΟʔϧೖྗཝΛ௥Ճ
142. ΦϑͳΒχοΫωʔϜͱ೥ྸ͸
     ೖྗͰ͖ͳ͍
143. Φϑͷ৔߹όϦσʔγϣϯ͢Δඞཁ͕ͳ͍ͷͰ
     Τϥʔʹ͸͠ͳ͍
144. ͔͠͠Φϯͷ৔߹͸
     όϦσʔγϣϯͷର৅ͱͳΔ
     ৗʹόϦσʔγϣϯ͢ΔΘ͚Ͱ͸ͳ͘
     ৚݅ʹԠͯ͢͡Δ͔͠ͳ͍͔Λม͑Δ
145. ͔͠͠Φϯͷ৔߹͸
     όϦσʔγϣϯͷର৅ͱͳΔ
     ৗʹόϦσʔγϣϯ͢ΔΘ͚Ͱ͸ͳ͘
     ৚݅ʹԠͯ͢͡Δ͔͠ͳ͍͔Λม͑Δ ͋Δબ୒ࢶΛબΜ͚ͩ࣌ͩ
     ௥ՃͷϑΟʔϧυ͕ొ৔͢Δ
     Έ͍ͨͳͷͬͯΑ͋͘ΔΑͶ
146. ۪௚ʹ࣮૷ͯ͠ΈΔ
147. ϓϩύςΟΛ௥Ճ struct RegisterForm { @Field var id = "" @Field var password = "" @Field var favoriteFruit: Fruit? var includesProfile = false @Field var nickName = "" @Field var age = "" } ϓϩϑΟʔϧΛؚΊΔ͔Ͳ͏͔
     Τϥʔঢ়ଶʹ͸ͳΒͳ͍ͷͰ
     !'JFME
     ͸ෆཁ
148. struct RegisterForm { @Field var id = "" @Field var password = "" @Field var favoriteFruit: Fruit? var includesProfile = false @Field var nickName = "" @Field var age = "" } χοΫωʔϜͱ೥ྸ ϓϩύςΟΛ௥Ճ
149. όϦσʔγϣϯॲཧΛ௥Ճ let nickNameValue: String? = $nickName.validate( with: .count(isIn: 1 ... 20), errorMessage: "χοΫωʔϜ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" )
150. όϦσʔγϣϯॲཧΛ௥Ճ let nickNameValue: String? = $nickName.validate( with: .count(isIn: 1 ... 20), errorMessage: "χοΫωʔϜ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) ͜ΕͰ͸ຖճόϦσʔγϣϯ͞Εͯ͠·͏
151. όϦσʔγϣϯॲཧΛ௥Ճ let nickNameValue: String?? if includesProfile { nickNameValue = $nickName.validate( with: .count(isIn: 1 ... 20), errorMessage: "χοΫωʔϜ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) } else { nickNameValue = .some(nil) } ϓϩϑΟʔϧΛؚΊΔ͚࣌ͩόϦσʔγϣϯ͢Δ
152. όϦσʔγϣϯॲཧΛ௥Ճ let nickNameValue: String?? if includesProfile { nickNameValue = $nickName.validate( with: .count(isIn: 1 ... 20), errorMessage: "χοΫωʔϜ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) } else { nickNameValue = .some(nil) } ೋॏΦϓγϣφϧʹͳ͍ͬͯΔ
153. όϦσʔγϣϯॲཧΛ௥Ճ let nickNameValue: String?? if includesProfile { nickNameValue = $nickName.validate( with: .count(isIn: 1 ... 20), errorMessage: "χοΫωʔϜ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) } else { nickNameValue = .some(nil) } w ͜ͷม਺͕औΓ͏Δ஋͸
     
     ͭ
     w 4USJOH TPNF TPNF MFU
     WBMVF
     ʜ
     ϓϩϑΟʔϧೖྗΦϯͰόϦσʔγϣϯύεͨ࣌͠
     w 4USJOH TPNF OJM
     ʜ
     ϓϩϑΟʔϧೖྗΦϑͷ࣌
     w 4USJOH OJM
     ʜ
     όϦσʔγϣϯʹࣦഊͨ࣌͠
     w ΍΍͍͜͠
154. ϦΫΤετ૊Έཱͯॲཧ΋ݟͯΈΔ let request = RegisterRequest( id: idValue, password: passwordValue, favoriteFruit: favoriteFruitValue, profile: includesProfile ? .init(nickName: nickNameValue!, age: ageValue!) : nil )
155. ϦΫΤετ૊Έཱͯॲཧ let request = RegisterRequest( id: idValue, password: passwordValue, favoriteFruit: favoriteFruitValue, profile: includesProfile ? .init(nickName: nickNameValue!, age: ageValue!) : nil ) ϓϩϑΟʔϧΛؚΊΔ͔Ͳ͏͔Ͱ஋Λม͑Δ
156. ϦΫΤετ૊Έཱͯॲཧ let request = RegisterRequest( id: idValue, password: passwordValue, favoriteFruit: favoriteFruitValue, profile: includesProfile ? .init(nickName: nickNameValue!, age: ageValue!) : nil ) ؚΊͳ͍ͳΒ
     OJM
     Λઃఆ
157. ϦΫΤετ૊Έཱͯॲཧ let request = RegisterRequest( id: idValue, password: passwordValue, favoriteFruit: favoriteFruitValue, profile: includesProfile ? .init(nickName: nickNameValue!, age: ageValue!) : nil ) ؚΊΔͳΒ
     1SP fi MF
     ϞσϧΛઃఆ͢Δ͕ʜ
158. ϦΫΤετ૊Έཱͯॲཧ let request = RegisterRequest( id: idValue, password: passwordValue, favoriteFruit: favoriteFruitValue, profile: includesProfile ? .init(nickName: nickNameValue!, age: ageValue!) : nil ) ·ͨڧ੍Ξϯϥοϓ͕ग़͖ͯͨ
159. όϦσʔγϣϯͨ͠Γ
     ͠ͳ͔ͬͨΓ͢Δͷ೉͍͠ ࣮ࡍͷϓϩδΣΫτͰ͸͜͏͍͏ͷ͕ଟ͔ͬͨΓ͢ΔͷͰख͸ൈ͚ͳ͍
160. ͱΓ͋͑ͣೋॏΦϓγϣφϧΛ ͳΜͱ͔͠Α͏
161. 7BMJEBUJPO3FTVMU
     ܕΛఆٛ enum ValidationResult<Value> { case success(Value) case failed } ࠓ·Ͱ͸खΛൈ͍ͯΤϥʔͳΒ
     OJM
     ͱ͍͕ͯͨ͠
     ͦͷ͍ͤͰ
     OJM
     ͱͯ͠ѻ͍͍ͨ৔ॴͱͬͪ͝ΌʹͳΔ
     ͱ͍͏Θ͚Ͱઐ༻ͷܕΛ༻ҙ
162. 7BMJEBUJPO3FTVMU
     ʹஔ͖׵͍͑ͯ͘ mutating func validate(with rule: ValidationRule<Value>, errorMessage: String) -> Value? { guard rule.validate(wrappedValue) else { self.errorMessage = errorMessage isErrorActive = true return nil } return wrappedValue }
163. 7BMJEBUJPO3FTVMU
     ʹஔ͖׵͍͑ͯ͘ mutating func validate(with rule: ValidationRule<Value>, errorMessage: String) -> ValidationResult<Value> { guard rule.validate(wrappedValue) else { self.errorMessage = errorMessage isErrorActive = true return .failed } return .success(wrappedValue) }
164. ͜Ε͕ let nickNameValue: String??
165. ͜͏ͳΔ let nickNameValue: ValidationResult<String?> w ͜ͷม਺͕औΓ͏Δ஋͸
     
     ͭ
     w 7BMJEBUJPO3FTVMUTVDDFTT TPNF MFU
     WBMVF
     ʜ
     ϓϩϑΟʔϧೖྗΦϯͰόϦσʔγϣϯύεͨ࣌͠
     w 7BMJEBUJPO3FTVMUTVDDFTT OJM
     ʜ
     ϓϩϑΟʔϧೖྗΦϑͷ࣌
     w 7BMJEBUJPO3FTVMUGBJMFE
     ʜ
     όϦσʔγϣϯʹࣦഊͨ࣌͠
     w Ϛγʹͳͬͨ
166. Αͦ͞͏ʁ
167. ͱࢥ͍͖΍ίϯύΠϧΤϥʔ💥
168. ܕ͕߹Θͳ͘ͳΔ let nickNameValue: ValidationResult<String?> if includesProfile { nickNameValue = $nickName.validate( with: .count(isIn: 1 ... 20), errorMessage: "χοΫωʔϜ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) } else { nickNameValue = .success(nil) } ͜ͷϝιουͷฦΓ஋͸
     7BMJEBUJPO3FTVMU4USJOH
     ͔͠͠୅ೖઌͷม਺͸
     7BMJEBUJPO3FTVMU4USJOH 
     ܕ͕߹Θͳ͍ 💥Cannot assign value of type 'ValidationResult<String>' to type 'ValidationResult<String?>'
169. ܕ͕߹Θͳ͘ͳΔ let nickNameValue: ValidationResult<String?> if includesProfile { nickNameValue = $nickName.validate( with: .count(isIn: 1 ... 20), errorMessage: "χοΫωʔϜ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) .map(Optional.some) } else { nickNameValue = .success(nil) } 7BMJEBUJPO3FTVMU
     ʹ
     NBQ
     ؔ਺Λ࡞ͬͯܕΛ߹ΘͤΔ
     Τϥʔ͸ղফ͞Ε͕ͨΘ͔Γʹ͍͘
170. ิ଍
     NBQ
     ͷ࣮૷ enum ValidationResult<Value> { case success(Value) case failed func map<R>(_ transform: (Value) -> R) -> ValidationResult<R> { switch self { case .success(let value): return .success(transform(value)) case .failed: return .failed } } }
171. HVBSE
     MFU
     ͕࢖͑ͳ͍ guard let idValue, let passwordValue, let favoriteFruitValue, let ageValue, let nickNameValue else { return nil } 💥Initializer for conditional binding must have Optional type, not 'ValidationResult<String?>' શͯ
     7BMJEBUJPO3FTVMU
     ܕʢඇΦϓγϣφϧʣʹͳͬͨͷͰΤϥʔʹͳΔʢ౰વʣ
172. HVBSE
     MFU
     ͕࢖͑ͳ͍ guard let idValue, let passwordValue, let favoriteFruitValue, let ageValue, let nickNameValue else { return nil } DBTF
     ʹมߋͯ͠ղܾ
     ղফ͕ͨ͠ɺͳΜ͔௕͍ guard case .success(let idValue) = idValue, case .success(let passwordValue) = passwordValue, case .success(let favoriteFruitValue) = favoriteFruitValue, case .success(let ageValue) = ageValue, case .success(let nickNameValue) = nickNameValue else { return nil }
173. Ұ୴ݟฦͯ͠ΈΔ
174. let nickNameValue: ValidationResult<String?> if includesProfile { nickNameValue = $nickName.validate( with: .count(isIn: 1 ... 20), errorMessage: "χοΫωʔϜ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) .map(Optional.some) } else { nickNameValue = .success(nil) } let ageValue: ValidationResult<Int?> if includesProfile { ageValue = $age.validate( byTransform: Int.init, with: .range(in: 0 ... 999), errorMessage: "೥ྸ͸0ʙ999ͷൣғͰೖྗ͍ͯͩ͘͠͞" ) .map(Optional.some) } else { ageValue = .success(nil) } guard case .success(let idValue) = idValue, case .success(let passwordValue) = passwordValue, case .success(let favoriteFruitValue) = favoriteFruitValue, case .success(let ageValue) = ageValue, case .success(let nickNameValue) = nickNameValue else { return nil }
175. let nickNameValue: ValidationResult<String?> if includesProfile { nickNameValue = $nickName.validate( with: .count(isIn: 1 ... 20), errorMessage: "χοΫωʔϜ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) .map(Optional.some) } else { nickNameValue = .success(nil) } let ageValue: ValidationResult<Int?> if includesProfile { ageValue = $age.validate( byTransform: Int.init, with: .range(in: 0 ... 999), errorMessage: "೥ྸ͸0ʙ999ͷൣғͰೖྗ͍ͯͩ͘͠͞" ) .map(Optional.some) } else { ageValue = .success(nil) } guard case .success(let idValue) = idValue, case .success(let passwordValue) = passwordValue, case .success(let favoriteFruitValue) = favoriteFruitValue, case .success(let ageValue) = ageValue, case .success(let nickNameValue) = nickNameValue else { return nil } ৚݅෇͖όϦσʔγϣϯͷͨΊͷ
     JG
176. let nickNameValue: ValidationResult<String?> if includesProfile { nickNameValue = $nickName.validate( with: .count(isIn: 1 ... 20), errorMessage: "χοΫωʔϜ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) .map(Optional.some) } else { nickNameValue = .success(nil) } let ageValue: ValidationResult<Int?> if includesProfile { ageValue = $age.validate( byTransform: Int.init, with: .range(in: 0 ... 999), errorMessage: "೥ྸ͸0ʙ999ͷൣғͰೖྗ͍ͯͩ͘͠͞" ) .map(Optional.some) } else { ageValue = .success(nil) } guard case .success(let idValue) = idValue, case .success(let passwordValue) = passwordValue, case .success(let favoriteFruitValue) = favoriteFruitValue, case .success(let ageValue) = ageValue, case .success(let nickNameValue) = nickNameValue else { return nil } ܕΛ߹ΘͤΔͨΊͷ
     NBQ
     ͺͬͱݟԿ͍ͯ͠Δ͔Θ͔Βͳ͍
177. let nickNameValue: ValidationResult<String?> if includesProfile { nickNameValue = $nickName.validate( with: .count(isIn: 1 ... 20), errorMessage: "χοΫωʔϜ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) .map(Optional.some) } else { nickNameValue = .success(nil) } let ageValue: ValidationResult<Int?> if includesProfile { ageValue = $age.validate( byTransform: Int.init, with: .range(in: 0 ... 999), errorMessage: "೥ྸ͸0ʙ999ͷൣғͰೖྗ͍ͯͩ͘͠͞" ) .map(Optional.some) } else { ageValue = .success(nil) } guard case .success(let idValue) = idValue, case .success(let passwordValue) = passwordValue, case .success(let favoriteFruitValue) = favoriteFruitValue, case .success(let ageValue) = ageValue, case .success(let nickNameValue) = nickNameValue else { return nil } ৚݅෇͖όϦσʔγϣϯେมʜ
     ΋ͬͱָʹॻ͚ͳ͍΋ͷ͔
178. 💡
179. ʮ4XJGU6*
     Έ͍ͨͳ਌͠Έ΍͍͢
     γϯλοΫεͰॻ͚ͨΒ͍͍ͷʹʯ
180. ʮ4XJGU6*
     ͷ͋ͷγϯλοΫε ͸
     3FTVMU#VJMEFS
     ΍ͳʯ
181. ʮ͋Εʁ
     ࠓͷঢ়گͰ࢖͑ΔͷͰ͸ʁʯ
182. 3FTVMU#VJMEFS
     Λ࢖͏
183. 3FTVMU#VJMEFS
     Λ࡞੒ @resultBuilder enum ValidationResultBuilder { static func buildExpression<Content>(_ expression: Content) -> ValidationResult<Content> { .success(expression) } static func buildExpression<Content>(_ expression: ValidationResult<Content>) -> ValidationResult<Content> { expression } static func buildBlock<Content>(_ result: ValidationResult<Content>) -> ValidationResult<Content> { result } static func buildOptional<Component>(_ component: ValidationResult<Component>?) -> ValidationResult<Component?> { guard let component else { return .success(nil) } switch component { case .success(let value): return .success(value) case .failed: return .failed } } static func buildEither<Content>(first: ValidationResult<Content>?) -> ValidationResult<Content?> { buildOptional(first) } static func buildEither<Content>(second: ValidationResult<Content>?) -> ValidationResult<Content?> { buildOptional(second) } static func buildBlock() -> ValidationResult<Void> { .success(()) } static func buildBlock<C0, C1>(_ c0: ValidationResult<C0>, _ c1: ValidationResult<C1>) -> ValidationResult<(C0, C1)> { guard let c0 = c0.successValue, let c1 = c1.successValue else { return .failed } return .success((c0, c1)) } … }
184. 3FTVMU#VJMEFS
     Λ࡞੒ @resultBuilder enum ValidationResultBuilder { static func buildExpression<Content>(_ expression: Content) -> ValidationResult<Content> { .success(expression) } static func buildExpression<Content>(_ expression: ValidationResult<Content>) -> ValidationResult<Content> { expression } static func buildBlock<Content>(_ result: ValidationResult<Content>) -> ValidationResult<Content> { result } static func buildOptional<Component>(_ component: ValidationResult<Component>?) -> ValidationResult<Component?> { guard let component else { return .success(nil) } switch component { case .success(let value): return .success(value) case .failed: return .failed } } static func buildEither<Content>(first: ValidationResult<Content>?) -> ValidationResult<Content?> { buildOptional(first) } static func buildEither<Content>(second: ValidationResult<Content>?) -> ValidationResult<Content?> { buildOptional(second) } static func buildBlock() -> ValidationResult<Void> { .success(()) } static func buildBlock<C0, C1>(_ c0: ValidationResult<C0>, _ c1: ValidationResult<C1>) -> ValidationResult<(C0, C1)> { guard let c0 = c0.successValue, let c1 = c1.successValue else { return .failed } return .success((c0, c1)) } … } ৄࡉ͸ׂѪ
185. ྫ let result: ValidationResult<(Int, String)> = ValidationResult.combine { ValidationResult<Int>.success(0) ValidationResult<String>.success("string") } DPNCJOF
     ͱ͍͏ϝιουΛ༻ҙͨ͠
     ෳ਺ͷ
     7BMJEBUJPO3FTVMU
     Λ
     
     ͭͷ
     7BMJEBUJPO3FTVMU
     ʹ·ͱΊͯ͘ΕΔ
186. ྫ let result: ValidationResult<(Int, String)> = ValidationResult.combine { ValidationResult<Int>.success(0) ValidationResult<String>.success("string") } *OU
     ͷ
     7BMJEBUJPO3FTVMU
     4USJOH
     ͷ
     7BMJEBUJPO3FTVMU
     Λ·ͱΊΔ
187. ྫ let result: ValidationResult<(Int, String)> = ValidationResult.combine { ValidationResult<Int>.success(0) ValidationResult<String>.success("string") } ݁Ռ͸λϓϧͱͳΔ ValidationResult<Int> ValidationResult<String> ValidationResult<(Int, String)> 
188. ྫ let result: ValidationResult<(Int, String?)> = ValidationResult.combine { ValidationResult<Int>.success(0) if .random() { ValidationResult<String>.success("string") } }
189. ྫ let result: ValidationResult<(Int, String?)> = ValidationResult.combine { ValidationResult<Int>.success(0) if .random() { ValidationResult<String>.success("string") } } JG
     ΋࢖͑Δ
190. ྫ let result: ValidationResult<(Int, String?)> = ValidationResult.combine { ValidationResult<Int>.success(0) if .random() { ValidationResult<String>.success("string") } } Φϓγϣφϧͱͯ͠ѻΘΕΔ
     *G
     ͷதʹೖΔͱ
     TPNF
     ೖΒͳ͍ͱ
     OJM
     ͱͳΔ
191. ྫ let result: ValidationResult<(Int, (String, Double)?)> = ValidationResult.combine { ValidationResult<Int>.success(0) if .random() { ValidationResult<String>.success("string") ValidationResult<Double>.success(0.0) } } JG
     ͷதͷཁૉΛ૿΍ͯ͠ΈΔ
192. ྫ let result: ValidationResult<(Int, (String, Double)?)> = ValidationResult.combine { ValidationResult<Int>.success(0) if .random() { ValidationResult<String>.success("string") ValidationResult<Double>.success(0.0) } } λϓϧͷΦϓγϣφϧͱͳΔ
193. ྫ let result: ValidationResult<(Int, (String, Double)?)> = ValidationResult.combine { ValidationResult<Int>.success(0) if .random() { ValidationResult<String>.success("string") ValidationResult<Double>.success(0.0) } }
194. ྫ let result: ValidationResult<(Int, (String, Double)?)> = ValidationResult.combine { ValidationResult<Int>.success(0) if .random() { ValidationResult<String>.success("string") ValidationResult<Double>.success(0.0) } }
195. ྫ let result: ValidationResult<(Int, (String, Double)?)> = ValidationResult.combine { ValidationResult<Int>.success(0) if .random() { ValidationResult<String>.success("string") ValidationResult<Double>.success(0.0) } }
196. ྫ let result: ValidationResult<(Int, (String, Double)?)> = ValidationResult.combine { ValidationResult<Int>.success(0) if .random() { ValidationResult<String>.success("string") ValidationResult<Double>.success(0.0) } }
197. ྫ ValidationResult.combine { ValidationResult.combine { ValidationResult.combine { ValidationResult.combine { ValidationResult.combine { ValidationResult.success("string") } } } } } DPNCJOF
     ͷதͰ΋
     DPNCJOF
     Λ࢖͑Δ
     4XJGU6*
     Ͱ
     7JFX
     ΛωετͰ͖Δͷͱಉ͡
198. ࣮ࡍʹ࢖ͬͯΈΔ
199. mutating func validateProfile() -> ValidationResult<RegisterRequest.Profile> { let result: ValidationResult<(String, Int)> = ValidationResult.combine { $nickName.validate( with: .count(isIn: 1 ... 20), errorMessage: "χοΫωʔϜ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $age.validate( byTransform: Int.init, with: .range(in: 0 ... 999), errorMessage: "೥ྸ͸0ʙ999ͷൣғͰೖྗ͍ͯͩ͘͠͞" ) } return result.map { (nickName: String, age: Int) in RegisterRequest.Profile(nickName: nickName, age: age) } } ͜ͷ෦෼ͷόϦσʔγϣϯॲཧ
200. mutating func validateProfile() -> ValidationResult<RegisterRequest.Profile> { let result: ValidationResult<(String, Int)> = ValidationResult.combine { $nickName.validate( with: .count(isIn: 1 ... 20), errorMessage: "χοΫωʔϜ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $age.validate( byTransform: Int.init, with: .range(in: 0 ... 999), errorMessage: "೥ྸ͸0ʙ999ͷൣғͰೖྗ͍ͯͩ͘͠͞" ) } return result.map { (nickName: String, age: Int) in RegisterRequest.Profile(nickName: nickName, age: age) } }
201. mutating func validateProfile() -> ValidationResult<RegisterRequest.Profile> { let result: ValidationResult<(String, Int)> = ValidationResult.combine { $nickName.validate( with: .count(isIn: 1 ... 20), errorMessage: "χοΫωʔϜ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $age.validate( byTransform: Int.init, with: .range(in: 0 ... 999), errorMessage: "೥ྸ͸0ʙ999ͷൣғͰೖྗ͍ͯͩ͘͠͞" ) } return result.map { (nickName: String, age: Int) in RegisterRequest.Profile(nickName: nickName, age: age) } }
202. mutating func validateProfile() -> ValidationResult<RegisterRequest.Profile> { let result: ValidationResult<(String, Int)> = ValidationResult.combine { $nickName.validate( with: .count(isIn: 1 ... 20), errorMessage: "χοΫωʔϜ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $age.validate( byTransform: Int.init, with: .range(in: 0 ... 999), errorMessage: "೥ྸ͸0ʙ999ͷൣғͰೖྗ͍ͯͩ͘͠͞" ) } return result.map { (nickName: String, age: Int) in RegisterRequest.Profile(nickName: nickName, age: age) } }
203. mutating func validateProfile() -> ValidationResult<RegisterRequest.Profile> { let result: ValidationResult<(String, Int)> = ValidationResult.combine { $nickName.validate( with: .count(isIn: 1 ... 20), errorMessage: "χοΫωʔϜ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $age.validate( byTransform: Int.init, with: .range(in: 0 ... 999), errorMessage: "೥ྸ͸0ʙ999ͷൣғͰೖྗ͍ͯͩ͘͠͞" ) } return result.map { (nickName: String, age: Int) in RegisterRequest.Profile(nickName: nickName, age: age) } } DPNCJOF
     ϝιουͰแΉ
204. mutating func validateProfile() -> ValidationResult<RegisterRequest.Profile> { let result: ValidationResult<(String, Int)> = ValidationResult.combine { $nickName.validate( with: .count(isIn: 1 ... 20), errorMessage: "χοΫωʔϜ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $age.validate( byTransform: Int.init, with: .range(in: 0 ... 999), errorMessage: "೥ྸ͸0ʙ999ͷൣғͰೖྗ͍ͯͩ͘͠͞" ) } return result.map { (nickName: String, age: Int) in RegisterRequest.Profile(nickName: nickName, age: age) } } ྆ํͷόϦσʔγϣϯ͕ύεͨ࣌͠ʹ
     4USJOH
     *OU
     ͷλϓϧΛೖखͰ͖Δ
205. mutating func validateProfile() -> ValidationResult<RegisterRequest.Profile> { let result: ValidationResult<(String, Int)> = ValidationResult.combine { $nickName.validate( with: .count(isIn: 1 ... 20), errorMessage: "χοΫωʔϜ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $age.validate( byTransform: Int.init, with: .range(in: 0 ... 999), errorMessage: "೥ྸ͸0ʙ999ͷൣғͰೖྗ͍ͯͩ͘͠͞" ) } return result.map { (nickName: String, age: Int) in RegisterRequest.Profile(nickName: nickName, age: age) } } ྆ํͷόϦσʔγϣϯ͕ύεͨ࣌͠ʹ
     4USJOH
     *OU
     ͷλϓϧΛೖखͰ͖Δ
206. mutating func validateProfile() -> ValidationResult<RegisterRequest.Profile> { let result: ValidationResult<(String, Int)> = ValidationResult.combine { $nickName.validate( with: .count(isIn: 1 ... 20), errorMessage: "χοΫωʔϜ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $age.validate( byTransform: Int.init, with: .range(in: 0 ... 999), errorMessage: "೥ྸ͸0ʙ999ͷൣғͰೖྗ͍ͯͩ͘͠͞" ) } return result.map { (nickName: String, age: Int) in RegisterRequest.Profile(nickName: nickName, age: age) } } ྆ํͷόϦσʔγϣϯ͕ύεͨ࣌͠ʹ
     4USJOH
     *OU
     ͷλϓϧΛೖखͰ͖Δ
207. mutating func validateProfile() -> ValidationResult<RegisterRequest.Profile> { let result: ValidationResult<(String, Int)> = ValidationResult.combine { $nickName.validate( with: .count(isIn: 1 ... 20), errorMessage: "χοΫωʔϜ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $age.validate( byTransform: Int.init, with: .range(in: 0 ... 999), errorMessage: "೥ྸ͸0ʙ999ͷൣғͰೖྗ͍ͯͩ͘͠͞" ) } return result.map { (nickName: String, age: Int) in RegisterRequest.Profile(nickName: nickName, age: age) } } ValidationResult<(String, Int)> ValidationResult<RegisterRequest.Profile> ܕΛม׵
208. let result: ValidationResult<(String, String, Fruit, RegisterRequest.Profile?)> = ValidationResult.combine { $id.validate( with: .count(isIn: 1 ... 20) && .isOnlyAlphanumeric, errorMessage: "ID͸1~20จࣈҎ಺ͷӳ਺ࣈͰೖྗ͍ͯͩ͘͠͞" ) $password.validate( with: .count(isIn: 1 ... 20), errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $favoriteFruit.validateNotNil( errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" ) if includesProfile { validateProfile() } }
209. let result: ValidationResult<(String, String, Fruit, RegisterRequest.Profile?)> = ValidationResult.combine { $id.validate( with: .count(isIn: 1 ... 20) && .isOnlyAlphanumeric, errorMessage: "ID͸1~20จࣈҎ಺ͷӳ਺ࣈͰೖྗ͍ͯͩ͘͠͞" ) $password.validate( with: .count(isIn: 1 ... 20), errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $favoriteFruit.validateNotNil( errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" ) if includesProfile { validateProfile() } }
210. let result: ValidationResult<(String, String, Fruit, RegisterRequest.Profile?)> = ValidationResult.combine { $id.validate( with: .count(isIn: 1 ... 20) && .isOnlyAlphanumeric, errorMessage: "ID͸1~20จࣈҎ಺ͷӳ਺ࣈͰೖྗ͍ͯͩ͘͠͞" ) $password.validate( with: .count(isIn: 1 ... 20), errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $favoriteFruit.validateNotNil( errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" ) if includesProfile { validateProfile() } }
211. let result: ValidationResult<(String, String, Fruit, RegisterRequest.Profile?)> = ValidationResult.combine { $id.validate( with: .count(isIn: 1 ... 20) && .isOnlyAlphanumeric, errorMessage: "ID͸1~20จࣈҎ಺ͷӳ਺ࣈͰೖྗ͍ͯͩ͘͠͞" ) $password.validate( with: .count(isIn: 1 ... 20), errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $favoriteFruit.validateNotNil( errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" ) if includesProfile { validateProfile() } }
212. let result: ValidationResult<(String, String, Fruit, RegisterRequest.Profile?)> = ValidationResult.combine { $id.validate( with: .count(isIn: 1 ... 20) && .isOnlyAlphanumeric, errorMessage: "ID͸1~20จࣈҎ಺ͷӳ਺ࣈͰೖྗ͍ͯͩ͘͠͞" ) $password.validate( with: .count(isIn: 1 ... 20), errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $favoriteFruit.validateNotNil( errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" ) if includesProfile { validateProfile() } }
213. let result: ValidationResult<(String, String, Fruit, RegisterRequest.Profile?)> = ValidationResult.combine { $id.validate( with: .count(isIn: 1 ... 20) && .isOnlyAlphanumeric, errorMessage: "ID͸1~20จࣈҎ಺ͷӳ਺ࣈͰೖྗ͍ͯͩ͘͠͞" ) $password.validate( with: .count(isIn: 1 ... 20), errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $favoriteFruit.validateNotNil( errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" ) if includesProfile { validateProfile() } } JODMVEFT1SP fi MF
     ͕
     USVF
     ͷ࣌͸
     TPNF
     GBMTF
     ͷ࣌͸
     OJM
     ʹͳΔ
214. let result: ValidationResult<(String, String, Fruit, RegisterRequest.Profile?)> = ValidationResult.combine { $id.validate( with: .count(isIn: 1 ... 20) && .isOnlyAlphanumeric, errorMessage: "ID͸1~20จࣈҎ಺ͷӳ਺ࣈͰೖྗ͍ͯͩ͘͠͞" ) $password.validate( with: .count(isIn: 1 ... 20), errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $favoriteFruit.validateNotNil( errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" ) if includesProfile { validateProfile() } } ʮϓϩϑΟʔϧೖྗཝ͕Φϯͷ࣌ʹϓϩϑΟʔϧ෦෼ΛόϦσʔγϣϯ͢Δʯ
     ͱ͍͏࢓༷͕ίʔυͰදݱͰ͖͍ͯΔ
215. let result: ValidationResult<(String, String, Fruit, RegisterRequest.Profile?)> = ValidationResult.combine { $id.validate( with: .count(isIn: 1 ... 20) && .isOnlyAlphanumeric, errorMessage: "ID͸1~20จࣈҎ಺ͷӳ਺ࣈͰೖྗ͍ͯͩ͘͠͞" ) $password.validate( with: .count(isIn: 1 ... 20), errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $favoriteFruit.validateNotNil( errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" ) if includesProfile { validateProfile() } } return result.map { id, password, favoriteFruit, profile in RegisterRequest(id: id, password: password, favoriteFruit: favoriteFruit, profile: profile) } ValidationResult<(String, String, Fruit, RegisterRequest.Profile?)> ValidationResult<RegisterRequest>
216. let result: ValidationResult<(String, String, Fruit, RegisterRequest.Profile?)> = ValidationResult.combine { $id.validate( with: .count(isIn: 1 ... 20) && .isOnlyAlphanumeric, errorMessage: "ID͸1~20จࣈҎ಺ͷӳ਺ࣈͰೖྗ͍ͯͩ͘͠͞" ) $password.validate( with: .count(isIn: 1 ... 20), errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $favoriteFruit.validateNotNil( errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" ) if includesProfile { validateProfile() } } return result.map(RegisterRequest.init) Ҿ਺ͷॱ൪ͱλϓϧͷॱ൪͕ಉ͡ͳͷͰ͜ΕͰ΋ྑ͍
217. let result: ValidationResult<(String, String, Fruit, RegisterRequest.Profile?)> = ValidationResult.combine { $id.validate( with: .count(isIn: 1 ... 20) && .isOnlyAlphanumeric, errorMessage: "ID͸1~20จࣈҎ಺ͷӳ਺ࣈͰೖྗ͍ͯͩ͘͠͞" ) $password.validate( with: .count(isIn: 1 ... 20), errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $favoriteFruit.validateNotNil( errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" ) if includesProfile { validateProfile() } } return result.map(RegisterRequest.init) 3FTVMU#VJMEFS
     ʹΑͬͯ৚݅෇͖όϦσʔγϣϯΛ௚ײతʹॻ͚ΔΑ͏ʹͳͬͨ
218. let result: ValidationResult<(String, String, Fruit, RegisterRequest.Profile?)> = ValidationResult.combine { $id.validate( with: .count(isIn: 1 ... 20) && .isOnlyAlphanumeric, errorMessage: "ID͸1~20จࣈҎ಺ͷӳ਺ࣈͰೖྗ͍ͯͩ͘͠͞" ) $password.validate( with: .count(isIn: 1 ... 20), errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $favoriteFruit.validateNotNil( errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" ) if includesProfile { validateProfile() } } return result.map(RegisterRequest.init) ͍ͭͰʹ
     HVBSE
     MFU
     ΋ෆཁʹͳͬͨ
219. ࠷ऴܕ
220. struct RegisterForm { @Field var id = "" @Field var password = "" @Field var favoriteFruit: Fruit? var includesProfile = false @Field var nickName = "" @Field var age = "" mutating func validate() -> ValidationResult<RegisterRequest> { $id.clearError() $password.clearError() $favoriteFruit.clearError() $nickName.clearError() $age.clearError() return ValidationResult.combine { $id.validate( with: .count(isIn: 1 ... 20) && .isOnlyAlphanumeric, errorMessage: "ID͸1~20จࣈҎ಺ͷӳ਺ࣈͰೖྗ͍ͯͩ͘͠͞" ) $password.validate( with: .count(isIn: 1 ... 20), errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $favoriteFruit.validateNotNil( errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" ) if includesProfile { validateProfile() } } .map(RegisterRequest.init) } mutating func validateProfile() -> ValidationResult<RegisterRequest.Profile> { ValidationResult.combine { $nickName.validate( with: .count(isIn: 1 ... 20), errorMessage: "χοΫωʔϜ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $age.validate( byTransform: Int.init, with: .range(in: 0 ... 999), errorMessage: "೥ྸ͸0ʙ999ͷൣғͰೖྗ͍ͯͩ͘͠͞" ) } .map(RegisterRequest.Profile.init) } }
221. struct RegisterForm { @Field var id = "" @Field var password = "" @Field var favoriteFruit: Fruit? var includesProfile = false @Field var nickName = "" @Field var age = "" mutating func validate() -> ValidationResult<RegisterRequest> { $id.clearError() $password.clearError() $favoriteFruit.clearError() $nickName.clearError() $age.clearError() return ValidationResult.combine { $id.validate( with: .count(isIn: 1 ... 20) && .isOnlyAlphanumeric, errorMessage: "ID͸1~20จࣈҎ಺ͷӳ਺ࣈͰೖྗ͍ͯͩ͘͠͞" ) $password.validate( with: .count(isIn: 1 ... 20), errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $favoriteFruit.validateNotNil( errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" ) if includesProfile { validateProfile() } } .map(RegisterRequest.init) } mutating func validateProfile() -> ValidationResult<RegisterRequest.Profile> { ValidationResult.combine { $nickName.validate( with: .count(isIn: 1 ... 20), errorMessage: "χοΫωʔϜ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $age.validate( byTransform: Int.init, with: .range(in: 0 ... 999), errorMessage: "೥ྸ͸0ʙ999ͷൣғͰೖྗ͍ͯͩ͘͠͞" ) } .map(RegisterRequest.Profile.init) } } 7JFX
     ͔Βঢ়ଶͱϩδοΫΛ෼཭ͤͨ͞
222. struct RegisterForm { @Field var id = "" @Field var password = "" @Field var favoriteFruit: Fruit? var includesProfile = false @Field var nickName = "" @Field var age = "" mutating func validate() -> ValidationResult<RegisterRequest> { $id.clearError() $password.clearError() $favoriteFruit.clearError() $nickName.clearError() $age.clearError() return ValidationResult.combine { $id.validate( with: .count(isIn: 1 ... 20) && .isOnlyAlphanumeric, errorMessage: "ID͸1~20จࣈҎ಺ͷӳ਺ࣈͰೖྗ͍ͯͩ͘͠͞" ) $password.validate( with: .count(isIn: 1 ... 20), errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $favoriteFruit.validateNotNil( errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" ) if includesProfile { validateProfile() } } .map(RegisterRequest.init) } mutating func validateProfile() -> ValidationResult<RegisterRequest.Profile> { ValidationResult.combine { $nickName.validate( with: .count(isIn: 1 ... 20), errorMessage: "χοΫωʔϜ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $age.validate( byTransform: Int.init, with: .range(in: 0 ... 999), errorMessage: "೥ྸ͸0ʙ999ͷൣғͰೖྗ͍ͯͩ͘͠͞" ) } .map(RegisterRequest.Profile.init) } } ϘΠϥʔϓϨʔτΛ
     1SPQFSUZ8SBQQFS
     Ͱղܾ
223. struct RegisterForm { @Field var id = "" @Field var password = "" @Field var favoriteFruit: Fruit? var includesProfile = false @Field var nickName = "" @Field var age = "" mutating func validate() -> ValidationResult<RegisterRequest> { $id.clearError() $password.clearError() $favoriteFruit.clearError() $nickName.clearError() $age.clearError() return ValidationResult.combine { $id.validate( with: .count(isIn: 1 ... 20) && .isOnlyAlphanumeric, errorMessage: "ID͸1~20จࣈҎ಺ͷӳ਺ࣈͰೖྗ͍ͯͩ͘͠͞" ) $password.validate( with: .count(isIn: 1 ... 20), errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $favoriteFruit.validateNotNil( errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" ) if includesProfile { validateProfile() } } .map(RegisterRequest.init) } mutating func validateProfile() -> ValidationResult<RegisterRequest.Profile> { ValidationResult.combine { $nickName.validate( with: .count(isIn: 1 ... 20), errorMessage: "χοΫωʔϜ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $age.validate( byTransform: Int.init, with: .range(in: 0 ... 999), errorMessage: "೥ྸ͸0ʙ999ͷൣғͰೖྗ͍ͯͩ͘͠͞" ) } .map(RegisterRequest.Profile.init) } } όϦσʔγϣϯ৚݅Λ
     ࠶ར༻Մೳ
     ίʔυิ׬Մೳ
     ݁߹Մೳ
     ʹͨ͠
224. struct RegisterForm { @Field var id = "" @Field var password = "" @Field var favoriteFruit: Fruit? var includesProfile = false @Field var nickName = "" @Field var age = "" mutating func validate() -> ValidationResult<RegisterRequest> { $id.clearError() $password.clearError() $favoriteFruit.clearError() $nickName.clearError() $age.clearError() return ValidationResult.combine { $id.validate( with: .count(isIn: 1 ... 20) && .isOnlyAlphanumeric, errorMessage: "ID͸1~20จࣈҎ಺ͷӳ਺ࣈͰೖྗ͍ͯͩ͘͠͞" ) $password.validate( with: .count(isIn: 1 ... 20), errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $favoriteFruit.validateNotNil( errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" ) if includesProfile { validateProfile() } } .map(RegisterRequest.init) } mutating func validateProfile() -> ValidationResult<RegisterRequest.Profile> { ValidationResult.combine { $nickName.validate( with: .count(isIn: 1 ... 20), errorMessage: "χοΫωʔϜ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $age.validate( byTransform: Int.init, with: .range(in: 0 ... 999), errorMessage: "೥ྸ͸0ʙ999ͷൣғͰೖྗ͍ͯͩ͘͠͞" ) } .map(RegisterRequest.Profile.init) } } 3FTVMU#VJMEFS
     Ͱ৚݅෇͖όϦσʔγϣϯΛ
     ௚ײతʹهड़
225. struct RegisterForm { @Field var id = "" @Field var password = "" @Field var favoriteFruit: Fruit? var includesProfile = false @Field var nickName = "" @Field var age = "" mutating func validate() -> ValidationResult<RegisterRequest> { $id.clearError() $password.clearError() $favoriteFruit.clearError() $nickName.clearError() $age.clearError() return ValidationResult.combine { $id.validate( with: .count(isIn: 1 ... 20) && .isOnlyAlphanumeric, errorMessage: "ID͸1~20จࣈҎ಺ͷӳ਺ࣈͰೖྗ͍ͯͩ͘͠͞" ) $password.validate( with: .count(isIn: 1 ... 20), errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $favoriteFruit.validateNotNil( errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" ) if includesProfile { validateProfile() } } .map(RegisterRequest.init) } mutating func validateProfile() -> ValidationResult<RegisterRequest.Profile> { ValidationResult.combine { $nickName.validate( with: .count(isIn: 1 ... 20), errorMessage: "χοΫωʔϜ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $age.validate( byTransform: Int.init, with: .range(in: 0 ... 999), errorMessage: "೥ྸ͸0ʙ999ͷൣғͰೖྗ͍ͯͩ͘͠͞" ) } .map(RegisterRequest.Profile.init) } } 3FTVMU#VJMEFS
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     7BMJEBUJPO3FTVMU
     Λ߹੒Մೳʹ
226. ࣮ࡍ΍ͬͯΈͨ݁Ռ w ͏·͍ͬͨ͘ͷͰ͸ͳ͍͔ͱࢥ͏
     w ࠷ॳʹʮ͜͏͍͏࣮૷Ͱ౷Ұ͠·͢ʯͱ͍͏ϨΫνϟʔΛͨ͠
     w େ͖ͳτϥϒϧ΋ͳ͘͜ͷελΠϧͰ࣮૷͖ͬͨ͠
     w ଞϓϩδΣΫτͰ΋ྲྀ༻͍͔ͨ͠ͱ͍͏ͱ΍͸Γن໛࣍ୈɻগͳ͍ͳΒ۪ ௚ʹ΍Δͷ͕ྑͦ͞͏
227. ·ͱΊ w େྔͷը໘Λ࣮૷͕όϥόϥʹͳΒͳ͍Α͏ͳઃܭΛߟ͑ͨ
     w ͸͡Ί͔Β͏·͘࡞Εͳ͍ͷͰʮ۪௚ʹ࡞Δˠ௚͢ʯΛ܁Γฦͨ͠
228. ࿩ͤͳ͔ͬͨ͜ͱ w Τϥʔͷཧ༝ʹΑͬͯΤϥʔϝοηʔδΛม͍͑ͨ࣌Ͳ͏͢Δͷ͔
     w 7JFX
     ଆͰ͸
     &OWJSPONFOU
     Λ࢖ͬͯΤϥʔͷঢ়ଶΛԼҐͷ
     7JFX
     ʹ఻͑ ͍ͯΔ͜ͱ
229. ͋Γͦ͏ͳ࣭໰ w 2
     όϦσʔγϣϯॲཧ๯಄ͷΤϥʔঢ়ଶͷϦηοτ͸
     WBMJEBUF
     ϝιου ͷλΠϛϯάͰ΍Ε͹ྑ͍ͷͰ͸ʁ
     w "
     Τϥʔ͕ى͖ͨޙʹόϦσʔγϣϯର৅֎ʹͳΔͱ
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