API を Firebase Realtime Database に移行して気付いたこと ver2

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API Λ Firebase Realtime Database ʹ Ҡߦͯ͠ؾ෇͍ͨ͜ͱ 2017/10/20 syamaoka iOSDC 2017 Reject Conference days2

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ࣗݾ঺հ ໊લɿ ࢁԬ ਅ໵ ( syamaoka ) झຯɿ ɾ MoBA : VainGlory ୲౰ɿ ɾ iOS, όοΫΤϯυ

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஫ҙ ⚠ ͜ͷൃද͸ Firebase Realtime Database 8ׂ, iOS 2ׂͷߏ੒Ͱ ͢ iOS͕ςʔϚͰ͕͢ɺ ࠓճ͸ Realtime Database (ҎԼRTDB) ʹ͍ͭͯͲΜͲΜޠͬ ͍͖ͯ·͢ʂ

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࠷ॳʹɾɾ

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ϦδΣΫτ͞Εͯ Α͔ͬͨ !

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Կނʁ ʮRTDB ͸༷ʑͳΞϓϦͰ΋࢖͑Δʯ Λओு͔ͨͬͨ͠ ! ͔͠͠ɺ৽͍͠ RTDB ͷ࣍ੈ୅σʔλϕʔε ͕ൃද͞Ε·͠ ͨɻ

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Cloud Firestore ެ։

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୲౰தͷαʔϏεͰ࢖༻͍ͯ͠Δػೳ • Realtime Database • Remote Conﬁg • Firebase Authentication • Analytics • App Indexing • Firebase Performance Monitoring

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୲౰தαʔϏεͰꙍ ֵአͭͼ͚Ρ䱛ᚆ • Realtime Database <- ͜͜த৺!ʢFirestore ࢖͍͍ͨ"ʣ • Remote Conﬁg • Firebase Authentication • Analytics • App Indexing • Firebase Performance Monitoring

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ΞδΣϯμ • API -> RTDB • Client Side Join • RTDB ͷ௨৴ྔ֬ೝํ๏ • API, RTDB, Firestore ͷൺֱ

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API -> RTDB

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RTDB ʹٻΊ͍ͯΔ͜ͱ • API ࡞੒޻਺ͷܰݮ • ύϑΥʔϚϯενϡʔχϯά͔Βͷ୤٫ • ΦϑϥΠϯ࣌ͷσʔλͷѻ͍΍͢͞ʢॲཧͷ؆୯͞ʣ

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ҠߦͰҰ൪ࠔͬͨͷ͸ɺ੔߹ੑ ! Firebase ͸ RDB Ͱ͸ͳ͍ͨΊɺ֎෦Ωʔ੍໿͕͋Γ·ͤΜɻ ͦͷͨΊɺ݁߹͕ඞཁͳՕॴ͸ొ࿥͢ΔࡍʹίʔυͰ֬ೝɻ εΩʔϚϨεͰ΋ɺ݁߹͢΂͖͔൱͔Λ൑அ͠ɺ ࠷దͳઃܭΛ͍ͯ͘͠ͷ͕ॏཁͰ͢ɻ ! ΤϯδχΞͷ࿹ͷݟͤॴ !

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͸͕ͣͩͬͨɾɾʂ

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Firestore Ͱɺ ͋Δఔ౓ղফ͞ΕΔ !

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Firestore ͷ৽͍͠σʔλܕ "Reference" Λ࢖͏

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RTDB ͷ৔߹ let articleId: String // primary key let categoryId: String // foreign key let title: String // ͦͷଞͷϑΟʔϧυ { "articles" : { "articleId1" : { "title" : "λΠτϧ", "category" : "categoryId1" } }, "categories" : { "categoryId1" : { "name": "ήʔϜ" } } }

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RTDB ͷ৔߹ let articleId: String // primary key let categoryId: String // foreign key let title: String // ͦͷଞͷϑΟʔϧυ { "articles" : { "articleId1" : { "title" : "λΠτϧ", "category" : "categoryId1" <- ͜Ε͕ category Ͱ͋Δͱ͍͏อূ͸ग़དྷͳ͍ ! } }, "categories" : { "categoryId1" : { "name": "ήʔϜ" } } }

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Firestore ͷ৔߹ let articleId: String // primary key let categoryId: DocumentReference // foreign key let title: String // ͦͷଞͷϑΟʔϧυ

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ιʔτ

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RTDB ͷιʔτͷಛ௃ • ΩʔΛࢦఆͯ͠ঢॱͰऔಘ • ฦ٫͢Δσʔλͷॱ൪͸อূ͍ͯ͠ͳ͍

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RTDB ͷιʔτͷಛ௃ • ΩʔΛࢦఆͯ͠ঢॱͰऔಘ • ฦ٫͢Δσʔλͷॱ൪͸อূ͍ͯ͠ͳ͍

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ฦ٫͢Δσʔλͷॱ൪͸อূ͍ͯ͠ͳ͍ (ྫ) ࠷৽σʔλΛ 3 ݅औಘ͢ΔͨΊɺ࡞੒೔࣌Ͱιʔτ͢Δ reference.child("articles").queryLimited(toFirst: 3).orderBy("created")

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݁Ռ ฦ٫͞ΕΔσʔλ͸࠷৽σʔλͷ 3 ͕݅ͩɺ ฦ٫͞ΕΔ JSON ͷฒͼॱ͸อূ͞Ε͍ͯͳ͍ Ҿ༻ݩ: https://ﬁrebase.google.com/docs/database/rest/retrieve-data?hl=ja#section-rest- ordered-data

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Q. ΞϓϦଆ͸Ͳ͏͢Ε͹͍͍ʁ A. ฦ٫͞Εͨ஋Λιʔτ͠௚͢ɻ

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͸͕ͣͩͬͨɾɾʂ

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Firestore Ͱ͸ ղফ͞ΕΔ !

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Firestore (ιʔτฤ) • ߱ॱʹରԠ ৄࡉ͸ͪ͜Β • ෳ߹ Index ʹରԠ ৄࡉ͸ͪ͜Β • ฦ٫͞ΕΔσʔλͷฒͼॱ͕ἧ͍ͬͯΔ

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RTDB Ͱ߱ॱʹ͢Δʹ͸ʁ ͪ͜ΒΛࢀর͍ͯͩ͘͠͞ ! https://speakerdeck.com/bpyamasinn/api-wo-ﬁrebase- realtime-database-niyi-xing-siteqi-fu-itakoto

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ϩδοΫॱʹ͢Δʹ͸ʁ ϩδοΫʹΑΔฒͼॱ͸ɺ DB Λ௚઀ࢀর͢Δํ๏Ͱ͸೉͍͠

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Index ࡞੒ { "articleOrders": { "articleId1": 1, "articleId2": 2 } }

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ϝϦοτ • ࠷খݶͷࢀর • ΞϓϦଆͷมߋͳ͠Ͱॱ൪Λมߋग़དྷΔ ※ articles ͷதʹ order Λ༻ҙͨ͠৔߹ɺarticles શͯΛಡ ΈࠐΉඞཁ͕͋ΓɺύϑΥʔϚϯε͕ѱ͍ ❌

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σϝϦοτ • ߋ৽ִ͕ؒ୹͘ग़དྷͳ͍ • ̍࣌ؒຖͷߋ৽Ͱ͋Ε͹େৎ෉͕ͩɺ5෼ຖͳͲ୹͘͢Ε ͹͢Δ΄Ͳίετ͕େ͖͘ͳΔ • ϩδοΫʹݶք͕͋Δ • ཪͰॲཧͯ͠Δ෼ͷ௨৴ྔ͕૿͑Δ

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σϝϦοτ • ߋ৽ִ͕ؒ୹͘ग़དྷͳ͍ • ̍࣌ؒຖͷߋ৽Ͱ͋Ε͹େৎ෉͕ͩɺ5෼ຖͳͲ୹͘͢Ε ͹͢Δ΄Ͳίετ͕େ͖͘ͳΔ • ϩδοΫʹݶք͕͋Δ • ཪͰॲཧͯ͠Δ෼ͷ௨৴ྔ͕૿͑Δ ্هͷσϝϦοτ͕ڐ༰ग़དྷͳ͍αʔϏεͷ৔߹͸ɺAPI Ͱ։ ൃͨ͠ํ͕Α͍͔΋

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Client Side Join Client Side Join ͸ RTDB ͱ Firestore ྆ํͰ࢖͑Δख๏

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σʔλྫ

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RTDB { "articles" : { "hogeId" : { "title" : "λΠτϧ", "category" : "categoryID_1" } }, "categories" : { "categoryID_1" : { "name": "ήʔϜ" } } }

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Firestore

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RTDB ͷ Client Side Join Λલఏͱ͠ ͨΞʔΩςΫνϟʹ͢Δඞཁ͕͋Δ

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݁߹ͷྲྀΕ 1. articles ͱ categories ͷ Observable Λ༻ҙ 2. RxSwift ΦϖϨʔλ zip Λར༻ Observable.zip(articles, categories)ɹɹɹɹɹɹɹɹɹɹɹɹɹɹɹɹ 1. ྆σʔλΛ݁߹͠ɺม׵ॲཧΛ͔͚Δ Observable.zip(articles, categories) {($0, $1)}.map(Translator())

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RTDB ͷ௨৴ྔ֬ೝํ๏

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ํ๏ 3ͭ • Xcode Ͱ௨৴ྔΛݟΔ • Charles Ͱ௨৴ྔΛݟΔ • Firebase CLI ͷ proﬁle Ͱ௨৴ྔΛݟΔ

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ํ๏ 3ͭ • Xcode Ͱ௨৴ྔΛݟΔ • Charles Ͱ௨৴ྔΛݟΔ • Firebase CLI ͷ proﬁle Ͱ௨৴ྔΛݟΔ <- ͜͜ͷ͓࿩Λ͠· ͢

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Firebase CLI ͱ͸ʁ Firebase ϓϩδΣΫτͷ؅ཧɺදࣔɺσϓϩΠΛߦ͏ͨΊͷ ͞·͟·ͳπʔϧΛఏڙͯ͘͠ΕΔ Command Line Interface

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࢖͍ํ 1. https://firebase.google.com/docs/cli/?hl=ja ͷಋೖखॱʹै ͏ 2. iPhone γϛϡϨʔλΛ্ཱͪ͛Δ 3. firebase database:profile --project {ϓϩδΣΫτID} Λ λʔϛφϧͰ࣮ߦ 4. iPhone γϛϡϨʔλͰܭଌ͍ͨ͠खॱͰಈ͔͢

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݁Ռը໘

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஫ҙ ⚠ ͜ͷ௨৴ྔ͸࣮ࡍͷμ΢ϯϩʔυྔΑΓগͳ͍ͷͰɺ͋͘·Ͱ ࢀߟ஋Ͱ͢ Ҿ༻ : https://ﬁrebase.google.com/docs/database/usage/proﬁle

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API, RTDB, Firestore ൺֱ

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API ͕༏Ε͍ͯΔ఺ • ΞϓϦଆͷ࣮૷͕γϯϓϧ • WebαʔϏε΋ల։͍ͯ͠Δ৔߹ɺAPI Λ࢖͍·ΘͤΔ • Ωϟογϡώοτ཰͕ߴ͍αʔϏε͸ྉ͕ۚ҆͘͢Ή • ϦϦʔεޙʹ໰୊͕ൃੜͨ࣌͠ʹɺAPI ଆͰΧόʔ͠΍͍͢

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API ͕༏Ε͍ͯΔ఺ • ΞϓϦଆͷ࣮૷͕γϯϓϧ • WebαʔϏε΋ల։͍ͯ͠Δ৔߹ɺAPI Λ࢖͍·ΘͤΔ • Ωϟογϡώοτ཰͕ߴ͍αʔϏε͸ྉ͕ۚ҆͘͢Ή • ϦϦʔεޙʹ໰୊͕ൃੜͨ࣌͠ʹɺAPI ଆͰΧόʔ͠΍͍͢ ....(ਖ਼௚ɺࢁ΄Ͳ͋Δ ! )

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RTDB ͕༏Ε͍ͯΔ఺ • API ͷ։ൃ͕ෆཁ • ΦϑϥΠϯରԠָ͕ • ௕೥ӡ༻͞Ε͍ͯΔͷͰɺࢀߟʹͳΔهࣄ͕ଟ͍

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Firestore ͕༏Ε͍ͯΔ఺ • API ͷ։ൃ͕ෆཁ • RTDB ͱൺ΂ͯ ΦϑϥΠϯରԠָ͕ • RTDB ͱൺ΂ͯ order, query ͕༏Ε͍ͯΔ • ࠓޙͲΜͲΜ৽͍͠ػೳ͕௥Ճ͞Ε͍ͯ͘༧ఆ • ՝ۚϞσϧ͕௨৴ྔͰ͸ͳ͘ɺࢀরճ਺ͳͷͰઅ໿͠΍͍͢

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Firestore ͕༏Ε͍ͯΔ఺ • API ͷ։ൃ͕ෆཁ • RTDB ͱൺ΂ͯ ΦϑϥΠϯରԠָ͕ • RTDB ͱൺ΂ͯ order, query ͕༏Ε͍ͯΔ • ࠓޙͲΜͲΜ৽͍͠ػೳ͕௥Ճ͞Ε͍ͯ͘༧ఆ • ՝ۚϞσϧ͕௨৴ྔͰ͸ͳ͘ɺࢀরճ਺ͳͷͰઅ໿͠΍͍͢ ....( RTDB ͱൺֱ͍͍ͯ͠ॴ͸ଞʹ΋͋Δ ! )

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Firestore ͷαϯϓϧ͸ͪ͜Β https://github.com/ﬁrebase/quickstart-ios/tree/master/ ﬁrestore

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Bolt ΋ Firestore ʹରԠ͢Δ https://github.com/ﬁrebase/bolt/issues/216

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·ͱΊ • RTDB ͸ૉ੖Β͍͠ɻͨͩɺFirestore ͸΋ͬͱૉ੖Β͍͠ ! • σʔλͷ݁߹ΛΞϓϦଆͰߦ͏࣌͸ RxSwift ͷ zip Λ࢖͏ͱ ؆୯ʹ࣮૷͕Մೳ • API -> RTDB, Firestore ΁ͷҠߦ͸ߟྀ͢Δ఺͕ͱͯ΋ଟ͍ ʢಛʹඅ༻໘ʣͷͰɺ Ҡߦ͢Δࡍ͸ྉۚͱ޻਺ͷݟੵ΋ΓΛೖ೦ʹߦ͍·͠ΐ͏ ʢռΊʣ