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BAD_REQUEST = 400 ΛΊ͙Δ໰͍ɻ ϚδοΫφϯόʔ͸ՄಡੑΛ
 Լ͛Δͷ͔? @qsona (FiNC Technologies)

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ࠓ೔࿩͢͜ͱ • BAD_REQUEST = 400 ͷྫ͔Β
 ϚδοΫφϯόʔͷੋඇͳͲʹ๲Β·ͤͯٞ࿦͢Δ • ͦͷաఔͰɺʮઃܭͷݴޠԽʯͷॏཁ͞Λ
 ͋ΒͨΊͯڧௐ͍ͨ͠

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ࠓ೔ͷείʔϓ֎ • ͦ΋ͦ΋εςʔλείʔυ
 Λ࢖͍෼͚Δ΂͖͔ • ྫ: validation error ͷͱ͖ʹ
 400 BAD REQUEST
 Λฦ͢΂͖͔Ͳ͏͔ • ͜Ε͸͜ΕͰਂ͍࿩

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૝૾ͯͨ͠΍ͭ

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ͳΜͱͳ͍͘΍ͳίʔυ

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ࡶͳࢦఠ • BAD REQUEST ͕ 400ͱ͔
 ͩΕͰ΋஌ͬͯΔΑͶ? • ࡶͳݴޠԽ

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ॏཁͳࢦఠ

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ΫΠζ • HTTPεςʔλείʔυ 409

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ΫΠζ • HTTPεςʔλείʔυ 409 ͸ҎԼͷ͏ͪͲΕ • PERMANENT REDIRECT • INSUFFICIENT STORAGE • CONFLICT • PROCESSING

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ΫΠζ • HTTPεςʔλείʔυ 409 ͸ҎԼͷ͏ͪͲΕ • 308 PERMANENT REDIRECT • 507 INSUFFICIENT STORAGE • 409 CONFLICT • 102 PROCESSING

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ྑ͍ࢦఠ

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վળҊ

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࿦఺ • ϚδοΫφϯόʔͷੋඇ • HTTPεςʔλείʔυΛ਺஋Ͱϕλॻ͖͢Δ͜ͱͷੋඇ

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ϚδοΫφϯόʔΛΊ͙Δ࿦఺ • "Մಡੑ͕ѱ͍" (not readable) • ࡶͳݴޠԽ

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ϚδοΫφϯόʔͷՄಡੑ͕௿͍ͱ͸ • Կʹର͢Δ਺஋͔͕ͩΘ͔Βͳ͍Α • ਺஋ࣗମͷࠜڌ(ଥ౰ੑ)͕Θ͔Βͳ͍Α • ڞ௨Խ͞Εͯͳ͍Α • ϚδοΫφϯόʔ͸ѱɺ໰౴ແ༻

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Կʹର͢Δ਺஋͔͕ͩΘ͔Βͳ͍Α • price * 1.08 • ͦ΋ͦ΋ 1.08 ͕͜͜ʹग़͖͍ͯͯΔཧ༝͕Θ͔Βͳ͍ • ਺஋ԋࢉͯ͠Δͱ͖ʹى͖͕ͪ

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Կʹର͢Δ਺஋͔͕ͩΘ͔Βͳ͍Α • ؔ਺(ϝιου)ݺͼग़͠ʹ਺஋Λ౉͢ͱ͖͸ɺ
 ͜ͷ໰୊͸ى͜Βͳ͍ • ϝιουఆٛΛݟΕ͹Θ͔ΔͷͰ • લͷྫͰ͸ TAX_RATE ఆ਺Λఆٛ͢ΔΑΓ΋ɺ(ྫ͑͹)
 price_included_tax(base_price) ϝιουΛఆٛͨ͠΄͏͕͍͍

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਺஋ࣗମͷࠜڌ(ଥ౰ੑ)͕Θ͔Βͳ͍Α • 409 ͕εςʔλείʔυΛදͯ͠Δͷ͸Θ͔Δ͕ɺ
 ͳͥ 409 ͳͷ͔͕Θ͔Βͳ͍ • ׂͱϚΠφʔͳ໰୊ͳؾ͕ͯ͠Δɻ͜Εʹ͍ͭͯ͸ޙड़

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ڞ௨Խ͞Εͯͳ͍Α • ڞ௨Խ͢΂͖ͳΒͯ͘͠Ε • Ͳ͏͍͏࣌ʹڞ௨Խ͢΂͖͔͸Θ͔Δͳ?

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const LIMIT = 10; ໰୊

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const LIMIT = 10; ໰୊ • Լͷ͏ͪ1ͭ΋ղܾ͍ͯ͠ͳ͍ • Կʹର͢Δ਺஋͔͕ͩ
 Θ͔Βͳ͍Α • ਺஋ࣗମͷࠜڌ(ଥ౰ੑ)͕
 Θ͔Βͳ͍Α • ڞ௨Խ͞Εͯͳ͍Α

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Ξϯέʔτ

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๻ͷதͰͷਖ਼ղ

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֮͑Δඞཁ͸ͳ͍ • 409 => conflict ͸άάΕ͹ҰॠͰग़ͯ͘Δ • ඞཁʹͳΔස౓ͷ໰୊ • ස౓͕ଟ͍ͳΒ͔֬ʹ໰୊͚ͩͲɺ
 ͦΜͳʹ͠ΐͬͪΎ͏͋Δ...?

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ͲͪΒͷ৘ใྔ͕େࣄ͔? • 409 • ࢓༷ɺΠϯλʔϑΣΠε • conflict • ҙຯɺ࣮૷ʹ͍ۙ

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ΠϯλʔϑΣΠεͷॏཁੑ • ྫ͑͹ OpenAPI 3 • Web API ͷ࢓༷ͷ
 υΩϡϝϯτ • ͜͜ʹ͸ `409` ͱ਺஋Ͱ ॻ͘

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4xx = Client Error • 409 ͩͬͨΒͱΓ͋͑ͣ Client Errorͩͱ͍͏ͱ͜Ζ·Ͱ͸
 Θ͔Δ • Conflict ͬͯݴΘΕͯ΋Α͘Θ͔Βͳ͘ͳ͍...?

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·ͱΊ • ؒҧ͍ͳ͘࢒೦ͳίʔυ͸ݴ͍ա͗ͩͬͨɺ͢·Μ • ϚδοΫφϯόʔ͸࠷ߴ • ઃܭ͸ݴޠԽΛ͍ͯ͜͠͏ • ͑͢ͳΈνϟϯε͸ࣗΒͷखͰ௫Ή΋ͷ

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