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RailsͰ
ϞσϧͷεςʔλεΛѻ͏
ϕλʔϓϥΫςΟε
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ࢲ(@ngmt83)ʹ͍ͭͯ
• टݍ͕ۤख͗͢Δʔͭ
• ϑϧελοΫΤϯδχΞ(༧ఆ)
<- twitter portfolio ->
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͍͖ͳΓͰ͕͢
Ϟσϧͷεςʔλε
Ͱࠔͬͨ͜ͱ͋Γ·ͤΜ͔ʁ
͋Γ·͢ΑͶʁ
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ྫ
• SNSͷΞΧϯτ
༑ୡ, ༑ୡਃத, ༑ୡղআࡁ, ϛϡʔτ, ϒϩοΫ
• ఆ੍ֹαʔϏεͷϓϥϯ
Free, Basic, Pro, ٳࢭத, ΞΧϯτআ, ͓ࢼ͠༻ϓϥϯ
• ܾࡁ
ϦΫΤετத, ঝೝࡁ, ࢧ͍ͪ, ܾࡁࣦഊ, Ωϟϯηϧࡁ, ෦ฦۚ
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ࠔͬͨྫ
• DBΛݟͯͲΜͳঢ়ଶ͔ͺͬͱΘ͔Γʹ͍͘ɺੳͮ͠Β͍
• ಛఆϝϯόʔ͔͠εςʔλεఆ͕Ͱ͖ͳ͍
• ฉ͍ͨ͜ͱͷͳ͍εςʔλε͕ੜ·Ε͍ͯΔ
• ໓ଟʹ༻͞Εͳ͍εςʔλε͕͍ͬͯΔ
• ഉଞతͳͣͷεςʔλεཱ͕྆͢Δ
• εςʔλεఆͷͨΊʹύϑΥʔϚϯε͕མͪΔ
• etc
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ݪҼ
• εςʔλεʹؔ͢Δઃܭڞ༗ෆ or ߋ৽࿙Ε
• εςʔλεछྨͷ૿Խɺεςʔλεؔ࿈݅ͷෳࡶԽ
- ఆ֎ͷεςʔλε
- ͦͷ͠ͷ͗తʹ҆қʹ૿ͨ͠εςʔλε
- εςʔλεA->BભҠՄೳ͕ͩɺA->CભҠͰ͖ͳ͍
- Ϟσϧx͕ଘࡏ͠ɺϞσϧy͕ଘࡏ͠ͳ͍߹εςʔλεD
• ࠷ॳظʹաʹॊೈੑΛ࣋ͬͨઃܭΛ͢Δ
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͔݁Β
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ΠϯΫϦϝϯλϧʹվળ͠Α͏
0. ঢ়ଶભҠਤΛॻ͘
1. ਖ਼نԽ͞ΕͨDB͔ΒεςʔλεใΛಡΈ
औΔ(εςʔλεใΛӬଓԽ͠ͳ͍)
2. εςʔλεใΛDB্ʹӬଓԽ͢Δ
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ྫ
• SNSͷΞΧϯτ(UserϞσϧ)ʹ͍ͭͯߟ͑Δ
• ొɺਖ਼ࣜొɺୀձɺBAN͕͋Δ
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ঢ়ଶભҠਤ
State Machine Diagram
Λॻ͘
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ঢ়ଶભҠਤΛॻ͘
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PlantUMLͩͱϨϏϡ͍͢͠
@startuml{super-simple-state-
machine.png}
title Userঢ়ଶભҠਤ0
[*] --> registered : ొ͢Δ
registered --> active : ਖ਼ࣜʹొ
͢Δ
active --> banned : BAN͞ΕΔ
active --> Inactive : ୀձ͢Δ
@enduml
.puml
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ਖ਼نԽ͞ΕͨDB͔Βεςʔλ
εใΛಡΈऔΔ
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Ϋϥεਤ
(schema.rb͔ΒࣗಈੜͰ͖·͢)
※ΠϕϯτܥΤϯςΟςΟΛ࿙Β͞ͳ͍
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User.rb
class User < ApplicationRecord
has_one :activation, class_name:
'UserActivation'
has_one :deactivation, class_name:
'UserDeactivation'
has_one :ban, class_name: 'UserBan'
def status
return 'active' if active?
return 'banned' if banned?
return 'inactive' if inactive?
return 'registered'
end
def registered?
return false if banned? || inactive? ||
active?
true
end
def active?
return false if banned? || inactive?
return false unless activation.present?
true
end
def banned?
ban.present?
end
def inactive?
deactivation.present?
end
def activate!
raise StandardError unless
registered?
create_activation!
end
def ban!
raise StandardError unless active?
create_ban!
end
def deactivate!
raise StandardError unless active?
create_deactivation!
end
end
user.rb user.rbଓ͖
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ΞΧϯτౚ݁ػೳ
Λ
Ճ࣮͍ͨ͠
͔͠͠
εςʔλε͕ෳࡶԽɾɾɾ
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εςʔλεใΛ
DB্ʹӬଓԽ͢Δ
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Ϋϥεਤ
(ΞϓϦ͔ΒࣗಈੜͰ͖·͢)
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ঢ়ଶભҠਤΛߋ৽
@startuml{state.png}
title Userঢ়ଶભҠਤ
[*] --> registered
registered --> active : ਖ਼ࣜʹొ͢Δ
active --> suspended : ౚ݁͞ΕΔ
suspended --> active : ౚ݁ղআ͞ΕΔ
suspended --> banned : BAN͞ΕΔ
suspended --> Inactive : ୀձ͢Δ
active --> banned : BAN͞ΕΔ
active --> Inactive : ୀձ͢Δ
@enduml
puml
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ঢ়ଶભҠਤΛߋ৽
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ෳࡶͳঢ়ଶભҠʹ
AASM
ͱ͍͏gemΛ͓͢͢Ί͠·͢
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AASMʹΑΔঢ়ଶભҠ
aasm do
state :registered, :initial => true
state :active, :suspended, :banned, :inactive
event :activate do
transitions from: :registered, to: :active
end
event :suspend do
transitions from: :active, to: :suspended
end
event :unsuspend do
transitions from: :suspended, to: :active
end
event :ban do
transitions from: [:active, :suspended], to: :banned
end
event :deactivate do
transitions from: [:active, :suspended], to: :inactive
end
end
user.rbͷaasm࣮෦(؆қίʔυ)
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AASMʹෳࡶͳঢ়ଶભҠ
has_many :suspensions, class_name: 'UserSuspension'
has_one :active_suspension, lambda { where(removed_at: nil) }, class_name:
‘UserSuspension'
aasm do
…
event :suspend do
transitions from: :active, to: :suspended, guard: :without_active_suspension?
after do
suspensions.create!
end
end
…
end
def without_active_suspension?
return false if active_suspension
true
end
user.rbͷౚ࣮݁෦
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ऄ
• ਖ਼نԽͤͣʹΰϦԡ͢ύλʔϯ͋Δ
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·ͱΊ
• εςʔλεཧΠϯΫϦϝϯλϧʹվળ͠Α͏
- ʮεςʔλεʹؔ͢Δઃܭڞ༗ෆ or ߋ৽࿙Εʯରࡦ
→PlantUMLͱϨϏϡͰઃܭڞ༗ɾߋ৽Λ࿙Β͞ͳ͍
- ʮεςʔλεछྨͷ૿Խɺεςʔλεؔ࿈݅ͷෳࡶԽʯରࡦ
→AASM gemͰεςʔλεཧɾ࣮Λ؆୯ʹ
- ʮ࠷ॳظʹաͳॊೈੑΛ࣋ͬͨઃܭΛ͢Δʯରࡦ
→࠷ॳখ࢝͘͞ΊΔɻDBઃܭ͕ਖ਼نԽ͞Ε͍ͯΕ͍͍ͩͨޙͰͲ
͏ʹ͔Ͱ͖Δ