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GraphQL で変わったこと・変わらなかったこと / graphql changing an...
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qsona
June 02, 2020
Technology
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GraphQL で変わったこと・変わらなかったこと / graphql changing and unchanging
吉祥寺.pm22
https://kichijojipm.connpass.com/event/177459/
qsona
June 02, 2020
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Transcript
GraphQL ͰมΘͬͨ͜ͱɾ มΘΒͳ͔ͬͨ͜ͱ 2020-06-02 ٢ࣉ.pm22 @qsona
whoami • @qsona • Web Developer at Quipper Limited •
͖ͪͽʔॳࢀՃ!!! ͏Ε͍͠!!! ٢ࣉԕ͍!!!
ࠓͷ • ͜Ε·ͰԿ͔ GraphQL & Rails Ͱ API ։ൃΛͯ͠ ຊ൪ϦϦʔεͨ͠
• RESTful ࣌ͱʮมΘͬͨ͜ͱɾมΘΒͳ͔ͬͨ͜ͱʯ ʹ͍͍ͭͯͨ͠
લఏ • Web API Internal use Λఆ͢Δ • πʔϧɾΤίγεςϜͷҰ͠ͳ͍
• APIͷઃܭɾ࣮ͷ͚ͩ • ਅͷREST (Hypermedia API) ͷ͠ͳ͍
Web API ͷઃܭख๏ • Usecase ϕʔε • Resource ϕʔε
Usecase-based Web API • ΫϥΠΞϯτͷϢʔεέʔεʹ߹Θͤͯ Web API Λ࡞Δ • Ϣʔεέʔε
≒ ը໘ • • ࣅͨΑ͏ͳAPI͕ཚཱ͍͢͠ • ຖAPI࡞Δͷ͕໘ => ෳͷϢʔεέʔεʹରԠ͢Δ ਆAPI ͕Ͱ͖Δ
Resource-based Web API • ΞϓϦέʔγϣϯͦͷͷͷ༷ʹ߹Θͤͯ Web API Λ࡞Δ • (جຊతʹ
API ఏڙଆͷ߹Ͱ࡞Δ)
Resource-based Web API • : ΫϥΠΞϯτͷϢʔεέʔεʹ߹Θͳ͍͕࣌͋Δ • 1ը໘ͰෳͷAPIϦΫΤετ͕ඞཁʹͳͬͨΓ • ٯʹ1ϦΫΤετதͰෆཁͳϑΟʔϧυؚΊͯऔͬͯ͠·͏͜ͱ͕͋Δ
• (=> ύϑΥʔϚϯεͷѱԽ) • Resource ͕ࡉ͔͘ͳΓ͗ͯ͢ (ςʔϒϧ୯ҐͳͲ) ΫϥΠΞϯτ͔Β͍ʹ͍͘͜ͱ͕͋Δ
Resource • ݸਓతʹɺ Recourse-based API ʹ͓͍ͯ JSONͷ1֊͝ͱͷ෦Λ Resource ͱݺΜͰ͍·͢
RESTful ࣌ͷࢦ
RESTful ࣌ͷࢦ • جຊతʹ Resource ϕʔεΛબ͢Δ • Resource ΛదͳཻͰఏڙ͢Δ •
ςʔϒϧ୯ҐͰͳ͍ • ΞϓϦέʔγϣϯ্ͷυϝΠϯϞσϧΛߟ͠ɺͦΕʹ߹ΘͤΔ • Ͳ͏ͯ͠ඞཁͳΒผ్ Usecase ༻ͷ endpoint Λੜ͢
GraphQL • Schema ͕ Type ͷ άϥϑߏʹͳ͍ͬͯΔ • query Ͱ
field Λࢦఆ͢Δ͜ͱͰɺ άϥϑͷதͷऔಘ͢Δ෦ΛࢦఆͰ͖Δ
GraphQL ࣌ͷࢦ • GraphQL Type ͕ Resource Λද͢ • query
͕ Usecase Λද͢ • Query Type ͷ field ͕ endpoint Ͱ͋Δ • ͭ·ΓɺResource ϕʔεͷAPIͱ Usecase ϕʔεͷAPIͷ ྑ͍ͱ͜ΖΛཱ྆Ͱ͖Δ!
RESTful => GraphQL Ͱ มΘΒͳ͔ͬͨ͜ͱ
มΘΒͳ͔ͬͨ͜ͱ • ΞϓϦέʔγϣϯͷυϝΠϯΛ͖ͪΜͱߟͯ͠ɺ Resource Λదͳཻʹ͢Δ͜ͱ • Fat Controller, Fat Serializer
Λආ͚Δ͜ͱ • Model ෦ͷઃܭख๏
RESTful => GraphQL Ͱ มΘͬͨ͜ͱ
ແ
มΘͬͨ͜ͱ • ઃܭɾ࣮ϨϕϧͰมΘΔ͜ͱ΄ͱΜͲͳ͔ͬͨ • RESTful ͷͱ͖ͱରԠ͢Δ֓೦͕͋Δ • ͱ͍͑ɺසग़ͷ...? • N+1
• HTTP endpoint ͕શͯ POST /graphql ʹͳΔ
N+1 • Query.users Λ resolve • ͦͷ1݅ͣͭʹରͯ͠ User.jobs Λ resolve
N+1 • ಉ͡ RESTful Ͱى͖Δ • GraphQL ʹ͓͍ͯͳͥΫϩʔζΞο ϓ͞ΕΔ?
N+1 • GraphQL ʹ͓͍ͯӈͷΑ͏ʹɺ ΫϥΠΞϯτ͔Β2௨ΓͷऔΓํ͕γϡο ͱͰ͖Δɺͭ·Γศར • ศར͔ͩΒى͖͍ͯΔ͚ͩ • ղܾ๏:
Batch Loader ͱݺΕΔΈ • Ruby: shopify/graphql-batch
HTTP endpoint ͕શͯ POST /graphql ʹͳΔ • Persisted Query ͱݺΕΔΈͰղܾͰ͖Δ
• ࣄલ / ϥϯλΠϜ ʹΫΤϦΛొ͢Δ
ઃܭ/(୯७ͳ)࣮ΑΓ֎ͷ The NEXT of REST - onk.ninja https://blog.onk.ninja/2017/09/21/the_next_of_rest
͜͜ͰҰ۟ ා͘ͳ͍ GraphQL is Better REST