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意図せぬレスポンスを防ぐAPI設計2つのコツ / Startup Rails #6
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taogawa
July 18, 2017
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意図せぬレスポンスを防ぐAPI設計2つのコツ / Startup Rails #6
2017/7/18「第6回スタートアップRails勉強会」での発表スライドです
taogawa
July 18, 2017
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Transcript
ҙਤͤ͵ϨεϙϯεΛ ͙APIઃܭ2ͭͷίπ 2017/7/18 taogawa
ࣗݾհ • גࣜձࣾΩονϋΠΫ ΤϯδχΞ • খ ߶ (taogawa) • αʔόʔαΠυΛओʹ୲͍ͯ͠·͢ɻ
ྉཧΛͭ͘Δਓͱ৯ΔਓͷަྲྀίϛϡχςΟαΠτ KitchHike https://kitchhike.com/
TechBlogͬͯ·͢ http://tech.kitchhike.com/ ʮDHHྲྀͷϧʔςΟϯάͰಘΒΕΔϝϦοτͱɺऔΓೖΕΔ্ͰͷϙΠϯτʯ ͱ͍͏هࣄΛॻ͖·ͨ͠
API։ൃʹ ͖ͭ·ͱ͏
ʮҙਤͤ͵Ϩεϙϯεʯ Λ͙ϙΠϯτ
render json: @user.as_json # => response # { # "id":
1, # "first_name": "hike", # "last_name": "kitch", # ... # "password_digest": "xxxxxxxxx" # !!!!! # }
ҙਤͤ͵Ϩεϙϯε • ϢʔβʔຊਓͷΈݟΕΔ͖ඇެ։ใΛϨ εϙϯεͰฦ͍ͯ͠Δ • Ծʹඇެ։APIͰ͋ͬͯΫϥΠΞϯτʹσʔ λ͕ΔͨΊɺආ͚ͳ͍͚ͯ͘ͳ͍ • ҰํͰͪΐͬͱͨ͠ϛεʹΑΔόά͕ೖΓࠐ Έ͍͢
ҙਤͤ͵ϨεϙϯεΛ ઃܭϨϕϧͰ͙
1. Ϩεϙϯε߲ ϗϫΠτϦετํࣜ
ϒϥοΫϦετํࣜΛࢭΊΑ͏ • ϒϥοΫϦετํࣜϛεΛ͍͢͠ • ͍ͭͷ·ʹ͔ΧϥϜ͕ՃΘͬͨ • ϒϥοΫϦετͷ͚Ճ͑࿙Ε • ۩ମతʹݴ͑ as_json
ࢭΊͨ΄͏͕͍͍ Ͱ͢
before render json: @user.as_json # => response # { #
"id": 1, # "first_name": "hike", # "last_name": "kitch", # ... # } • as_jsonσϑΥϧτͰશͯͷ߲Λฦ͢ͷͰ ਏ͍ɾɾɾ
ϗϫΠτϦετํࣜʹ͠Α͏ • ϨεϙϯεͰฦ͖߲͢Λ໌จԽ͢Δ • ॻ͔ͳ͍߲Ϩεϙϯεʹؚ·Εͳ͍ • ActiveModelSerializer, Jbuilder • as_json
͕ආ͚ΒΕͳͯ͘ɺͤΊͯonlyࢦఆ Λ͠Α͏
after class UserSerializer < ActiveModel::Serializer attributes :id, :full_name def full_name
"#{object.first_name} #{object.last_name}" end end # => response # { # "id": 1, # "full_name": "hike kitch" # }
2. Ϣʔβʔࣗ/ͦΕҎ֎ͷ ϦιʔεΤϯυϙΠϯτΛ ͚Δ
Α͋͘Δύλʔϯ • ΫΤϦύϥϝʔλͰϨεϙϯεΛग़͚͠Δ • Ϩεϙϯεͷग़͚͠ͷ݅ఆϛε • ެ։Ϧιʔε͚ͩͷͭΓ͕ϢʔβʔͷϓϥΠ ϕʔτϦιʔεฦ͍ͯͨ͠
before # /kitchens/:id?scope=self class KitchensController < ApplicationController def show if
params[:scope] == "self" # ... else # ... end end end
͍ͬͦΤϯυϙΠϯτΛ ͚Α͏ • ΫΤϦύϥϝʔλͰͷ݅ذͰͳ͘ɺί ϯτϩʔϥࣗମΛ͚Δ • ϓϥΠϕʔτϦιʔεselfͷωʔϜεϖʔε ԼʹҰݩԽ
after # /kitchens/:id class KitchensController < ApplicationController def show end
end # /self/kitchens/:id class Self::KitchensController < ApplicationController def show end end
ΤϯυϙΠϯτׂͷϝϦοτ • ݅ذͷϛεͷ৺Λͳͤͨ͘ • ҆৺ײ͕ͱͯେ͖͍ • ͜ͷΤϯυϙΠϯτɺ͜ͷϨεϙϯεɺͷ Γ͚͕͖ͬΓͨ͠ • ։ൃऀͷೝࣝҧ͍Λͳͤͨ͘
ΤϯυϙΠϯτׂͷσϝϦο τ • વAPIίʔϧ૿͑Δ • N+1ʹͳΒͳ͍ͷͰڐ༰͍ͯ͠Δ • ׂͨ͠ίϯτϩʔϥͰͷίʔυͷॏෳ͕ى ͜Γ͍͢ •
ϞσϧʹίʔυΛدͤͯରԠ
·ͱΊ • ҙਤͤ͵ϨεϙϯεΛฦ͞ͳ͍ઃܭ2ͭͷίπ • ϨεϙϯεϗϫΠτϦετํࣜʹ͢Δ • ݅ذΑΓΤϯυϙΠϯτͷׂ
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