日時処理の新スタンダード: Synchro によるタイムゾーン安全、楽々開発

by Kei Kamikawa

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🕐೔࣌ॲཧͷ৽ελϯμʔυ🕧   4ZODISPʹΑΔλΠϜκʔϯ҆શɺָʑ։ൃ   (P$POGFSFODFNJOJ8JOUFS*/,:050

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!DPEFIFY !$PEF)FY w /05")05&-Ͱಇ͍͍ͯ·͢ w 1P$Λ࡞ͬͯɺӡ༻·Ͱ͍࣋ͬͯ͘ w ࣗಈԽɺ"*ΠϯςάϨʔγϣϯ w *❤(P w IUUQTHJUIVCDPN$PEF)FYW[ w IUUQTHJUIVCDPN$PEF)FYEE

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IUUQTWJNFPDPN

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4ZODISP IUUQTHJUIVCDPN$PEF)FYTZODISP

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։ൃ͖͔͚ͬͷϙετ

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։ൃ͖͔͚ͬͷϙετ w ͜ͷπΠʔτ͸ਅ໘໨ʹड͚ࢭΊͯྑ͍   ϑΟʔυόοΫͩͱࢥͬͨ w ೔෇ςΩετͷม׵ɺλΠϜκʔϯͷѻ͍͸೉͍͠ w ՃࢉݮࢉͳͲجຊతͳॲཧ΋༉அ͢Δͱʜ w (FOFSJDTΛ࠷େʹ׆͔ͨ͠ྫ͕ͳ͔ͬͨ͜ͱ΋େ͖͍

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(PͰ΋Ͱ͖ΔΑʂ

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IUUQTHPEFWQMBZQ2M$./-GK

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4ZODISP w $ISPOPʹӨڹΛड͚ͨ   ܕΛར༻ͨ͠λΠϜκʔϯͷαϙʔτ w རศੑͱ࢖͍΍͢͞ʢ%FWFMPQFS&YQFSJFODF🚀ʣ w *40ͷ׬શαϙʔτʹΑΔ֦ுੑ

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ܕΛར༻ͨ͠λΠϜκʔϯͷαϙʔτ ڧྗͳܕ҆શͷ೔෇ॲཧ

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Ͳ͏࣮ݱͯ͠Δʁ

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Ͳ͏࣮ݱͯ͠Δʁ IUUQTHJUIVCDPN$PEF)FYTZODISPCMPCWTZODISPHP--

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͜ΕͰղܾͰ͖Δࣄྫ

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ྫ%#ΞϓϦέʔγϣϯ

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w %#ͱΞϓϦέʔγϣϯίʔυؒͷม׵͸   Ϩίʔυʹอଘ͞Ε͍ͯΔ೔෇࣌ࠁͷςΩετʹґଘ͢Δ w λΠϜκʔϯ৘ใؚ͕·Ε͍ͯΔ৔߹ɺ   ΞϓϦέʔγϣϯ͕લఏͱ͢ΔλΠϜκʔϯͷม׵͕ඞਢ ྫ%#ΞϓϦέʔγϣϯ

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ྫ%#ΞϓϦέʔγϣϯ

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ྫ%#ΞϓϦέʔγϣϯ 65$ͷ೔෇จࣈྻ +45ͷ೔෇จࣈྻ 2023-12-02 00:00:00Z 2023-12-02 00:00:00+09:00

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ྫ%#ΞϓϦέʔγϣϯ

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ྫ%#ΞϓϦέʔγϣϯ 65$ͷ೔෇จࣈྻ +45ͷ೔෇จࣈྻ͸ͦͷ·· 2023-12-02 00:00:00Z 2023-12-02 00:00:00+09:00 ʹ࣌ؒ͞Εͨ IUUQTHPEFWQMBZQ+0I9.JCJ

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ྫ+40/ΞϓϦέʔγϣϯ

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w +40/͸ΞϓϦέʔγϣϯ֎ͷੈքͱ΍ΓऔΓͰ࢖͏ w +40/͚ͩͰͳ͘9.-΍1SPUPDPM#V ff FS΋ͦ͏ w ͜͜Ͱ΋λΠϜκʔϯ৘ใؚ͕·Ε͍ͯΔ৔߹ɺ   ΞϓϦέʔγϣϯ͕લఏͱ͢ΔλΠϜκʔϯͷม׵͕ඞਢ w %#ͷྫͱಉ͡ײ͡ͳͷͰίʔυ͸ׂѪ ྫ+40/ΞϓϦέʔγϣϯ

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ΞϓϦͱ֎ͷੈքͷ   λΠϜκʔϯΛ߹Θͤ΍͍͢ʂ

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*40ͷ׬શαϙʔτ ׬શαϙʔτͯ͠ಘΒΕͨύϫʔ💪

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*40ͷ׬શαϙʔτ IUUQT[FOOEFWOPUBIPUFMBSUJDMFTGBBGGG

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*40ͷ׬શαϙʔτ w ೔෇ w ::::..%%PS::::..%% $BMFOEBS%BUF w ::::8XX%PS::::8XX% 8FFL%BUF w ::::%%%PS::::%%% 0SEJOBM%BUF w ࣌ؒ w IINNTT IINN IIPSIINNTT IINN II   PS; λΠϜκʔϯ

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*40ͷ׬શαϙʔτ w ೔෇࣌ࠁ w 5; 5; w 5 5 w ܧଓ࣌ؒظؒɺִ࣌ؒؒɺ܁Γฦִؒ͠ w 1:.%5).4PS18 w w 35;1:.%5).

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*40ͷ׬શαϙʔτ w *40ͷϑΥʔϚοτ͸ଟذʹ౉Δ w ೔෇ʹؔͯ͠͸૬ޓม׵͕Ͱ͖ΔΑ͏ʹͳ͍ͬͯΔ w 8FFL%BUF0SEJOBM%BUF$BMFOEBS%BUF w ϥΠϒϥϦͷ͍ͤͰόά͕ൃੜ͢Δͱҙຯ͕ͳ͍ w

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*40ͷ׬શαϙʔτ w *40ͷϑΥʔϚοτ͸ଟذʹ౉Δ w ೔෇ʹؔͯ͠͸૬ޓม׵͕Ͱ͖ΔΑ͏ʹͳ͍ͬͯΔ w 8FFL%BUF0SEJOBM%BUF$BMFOEBS%BUF w ϥΠϒϥϦͷ͍ͤͰόά͕ൃੜ͢Δͱҙຯ͕ͳ͍ w 4ZODISPͰ͸ςετΛ͔ͳΓଟ͘ॻ͍͍ͯΔ

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*40ͷ׬શαϙʔτ

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*40ͷ׬શαϙʔτ ʊਓਓਓਓਓਓਓਓਓਓʊ ʼɹ࠷େഒͷࠩʂʂɹʻ ʉ:?:?:?:?:?:?:?:?:ʉ

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iso8601.ParseDateTime()

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iso8601.ParseDateTime() IUUQTQLHHPEFWHJUIVCDPN$PEF)FYTZODISP!W JTP1BSTF%BUF5JNF

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iso8601.ParseDateTime() %#తʹΑ͘ݟΔϑΥʔϚοτ   "2017-04-24 09:41:34.502+0100" ࣮ࡍͷ*40ͷ࢓༷Ͱ͸   "2017-04-24T09:41:34.502+0100" ͜ΕΛڐ༰͢ΔΦϓγϣϯ   iso8601.WithTimeDesignators(' ')

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iso8601.ParseDateTime() IUUQTHPEFWQMBZQU)98+0K&

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iso8601.ParseDateTime() w ͋ΔϩέʔγϣϯΛى఺ͱͯ͠ύʔε͍ͨ͠έʔε w time.ParseInLocation()ͷΑ͏ͳ΋ͷ • iso8601.WithInLocation(loc)

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iso8601.ParseDateTime() IUUQTHPEFWQMBZQ*(8C(BE.Y

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֎ͷੈքͷೖྗ͔Β   ࣌ؒͷߏ଄΁ͷม׵ʹ໾ཱ͍ͯͯΔ

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རศੑͱ࢖͍΍͢͞ ϢʔβʔϑϨϯυϦʔͳػೳ

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ϦΫΤετ಺ͷ࣌ؒ౷Ұ IUUQTQLHHPEFWHJUIVCDPN$PEF)FYTZODISP/PX$POUFYU

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ϦΫΤετ಺ͷ࣌ؒ౷Ұ

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ϦΫΤετ಺ͷ࣌ؒ౷Ұ ݱࡏ࣌ࠁΛϛυϧ΢ΣΞͰηοτ ϋϯυϥͰऔΓग़ͯ͠࢖͏

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ϦΫΤετ಺ͷ࣌ؒ౷Ұ w %#ʹอଘ͢Δ࣌ࠁͱϩδοΫͷ࣌ࠁΛ؆୯ʹ౷ҰͰ͖Δ w ֎෦"1*΁ͷλΠϜελϯϓ͕%#ͱಉ࣌͡ࠁʹͳΔ w ੔߹ੑͷ୲อ

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ςετ΋؆୯ $POUFYUͰ࣌ؒΛݻఆ͢Δ ݻఆ͞Ε͍ͯΔ͜ͱΛ֬ೝ

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࿈ଓͨ࣌ؒ͠ͷੜ੒ IUUQTQLHHPEFWHJUIVCDPN$PEF)FYTZODISP1FSJPE

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࿈ଓͨ࣌ؒ͠ͷੜ੒ TZODISP5JNFΛύϥϝʔλʹ͢Δ

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UJNF5JNFΛύϥϝʔλʹ͢Δ ࿈ଓͨ࣌ؒ͠ͷੜ੒

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TUSJOHͱ<>CZUFΛύϥϝʔλʹ͢Δ ࿈ଓͨ࣌ؒ͠ͷੜ੒

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TUSJOHΛύϥϝʔλͰ ࿈ଓͨ࣌ؒ͠ͷੜ੒

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ִؒΛࢦఆ͢Δ

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UJNF%VSBUJPOͰࢦఆ͢Δ ִؒͷࢦఆ IUUQTQLHHPEFWHJUIVCDPN$PEF)FYTZODISP1FSJPE1FSJPEJD%VSBUJPO

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"EE%BUFͷܗࣜͰࢦఆ͢Δ ִؒͷࢦఆ IUUQTQLHHPEFWHJUIVCDPN$PEF)FYTZODISP1FSJPE1FSJPEJD%BUF

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*40ͷظؒͰࢦఆ͢Δ ִؒͷࢦఆ IUUQTQLHHPEFWHJUIVCDPN$PEF)FY TZODISP1FSJPE1FSJPEJD*40%VSBUJPO

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εϥΠε΁ͷม׵΋Մೳ ִؒͷࢦఆ

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ࠓޙͷ։ൃ

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ࠓޙͷ։ൃ w ਓʹ༏͍͠ϑΥʔϚοτͰͷग़ྗ w EBZT EBZTBHP 5PEBZJTB4BUVSEBZͳͲ w *OରԠ w ศརϝιουͷ௥Ճ w ߴ଎Խ🚀