Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Sign up for free
Menu
Search
Features
All features
Private URLs
Password Protection
Custom URLS
Scheduled publishing
Remove Branding
Restrict embedding
Deck Collections
Notes
Features
All features
Private URLs
Password Protection
Custom URLS
Scheduled publishing
Remove Branding
Restrict embedding
Deck Collections
Notes
Explore
Featured decks
Featured speakers
Programming
Technology
Storyboards
Explore
Featured decks
Featured speakers
Programming
Technology
Storyboards
Pricing
Search
Sign in
Sign up for free
yawaraka zouzei
Search
uvb_76
December 14, 2019
Programming
2.1k
0
Share
Embed
Copy iframe code
Copy JS code
Copy link
Start on current slide
yawaraka zouzei
uvb_76
December 14, 2019
More Decks by uvb_76
See All by uvb_76
地元にいないローカルオーガナイザーの立ち回り
uvb_76
2
1.7k
ユーザーにサブドメインの ECサイトを提供したい (あるいは) 2026年函館で一番熱くなるかもしれない言語の話
uvb_76
0
960
Rails 7.2 のリリースノートを見て思ったこと
uvb_76
0
1k
Rails Girls ガイドを使って社内で Rails 講座を開催した
uvb_76
0
180
問い合わせ調査との付き合い方
uvb_76
0
270
メール認証とRuby
uvb_76
0
1.2k
開発環境(物理)を作る
uvb_76
0
1.8k
Other Decks in Programming
See All in Programming
Optunaを作ったときにやりたかったこと、その後 (2026/10/16, Optuna Meetup #3)
iwiwi
2
1.1k
半永久的に提供し続けられるプライベートクラウドを目指して ― 利用者の認知負荷を抑えるAPI抽象化とハードウェア世代交代の基盤設計
tomokon
0
510
Railsバージョンを4倍にした話
optim
0
490
見えないものを探る要求要件定義に必要な基本的思考 / invisible-requirement-thinking
minodriven
15
8.6k
AIに “答え“を書かせるのを やめてみた
___akari11
0
120
オーケストレーション記述言語 Katari
yukikurage
0
130
自作Discord音声botをLambda MicroVMsに移行した話 / Migrating My Discord Voice Bot to Lambda MicroVMs
akihisaikeda
0
120
気持ちぃ〜角丸 Squircle
ryu1013
0
320
月間100万人のサービス刷新で、 技術選定をHonoに振り切った話
yutobara
8
6.8k
ActionController meets Protocol Buffers
sorah
0
630
當我們開始不讀 Code - AI Agent 時代,Code Review 與 Clean Code 還剩下什麼?
jame2408
1
280
【加筆修正版】Laravel のアプリケーションをどこにデプロイするか #phpcon_ehime
akase244
0
150
Featured
See All Featured
VelocityConf: Rendering Performance Case Studies
addyosmani
331
25k
JavaScript: Past, Present, and Future - NDC Porto 2020
reverentgeek
52
6.1k
Pawsitive SEO: Lessons from My Dog (and Many Mistakes) on Thriving as a Consultant in the Age of AI
davidcarrasco
0
260
Game over? The fight for quality and originality in the time of robots
wayneb77
1
310
Tips & Tricks on How to Get Your First Job In Tech
honzajavorek
1
800
Mozcon NYC 2025: Stop Losing SEO Traffic
samtorres
1
580
The Success of Rails: Ensuring Growth for the Next 100 Years
eileencodes
47
8.4k
Paper Plane
katiecoart
PRO
5
54k
Build The Right Thing And Hit Your Dates
maggiecrowley
39
3.5k
My Coaching Mixtape
mlcsv
0
360
Music & Morning Musume
bryan
48
7.4k
Cheating the UX When There Is Nothing More to Optimize - PixelPioneers
stephaniewalter
287
14k
Transcript
͡Ίͯͷ૿੫ରԠ "UTVTIJ,BUTVVSB(.01FQBCP *OD ฏ3VCZձٞ ΘΒ͔૿੫
ࠓ͢͜ͱ w݄ͷফඅ੫૿੫ରԠͰ&$αʔϏεͰඞཁʹͳͬͨ͜ͱ w࣮ࡍʹରԠ͢Δ্ͰؾΛ͚ͭͨ͜ͱ w݄Λܴ͑ͨͱ͖ɺ͏·͍͔͘ͳ͔ͬͨ͜ͱ 3VCZͷ͋·Γͳ͍Ͱ͢ɻੜ׆ൃදͰ͢ɻ
উӜರJLBSVHB!67#@ (.0ϖύϘגࣜձࣾ&$ࣄۀ෦ΧϥʔϛʔϦϐʔτνʔϜ IUUQTJLBSVHBPSH
IUUQTDPMPSNFSFQFBUKQ
ΧϥʔϛʔϦϐʔτ w8FC"1*αʔόʔ 3VCZPO3BJMT wϑϩϯτΤϯυαʔόʔ &YQSFTT 7VFKT αϒεΫϦϓγϣϯͷܖ͕Ͱ͖ΔϥϯσΟϯάϖʔδΛ࡞Δ͜ͱ͕Ͱ ͖ΔαʔϏε
݄αʔϏεϦϦʔε⾣͡Ίͯͷ૿੫
૿੫
&$αʔϏεʹऻ͍͔͔Δফඅ੫૿੫ wγϣοϓΦʔφʔͷαʔϏεར༻ྉͷফඅ੫ wγϣοϓΦʔφʔ͕ઃఆ͢Δͷফඅ੫ wܰݮ੫ͷઃఆΛؚΉ
ܰݮ੫ wಛఆͷ੫͕͡Όͳͯ͘ʹͳΓ·͢Α wαʔϏεఏڙଆ͕அ͢ΔͷͰͳ͘ɺʮγϣοϓ Φʔφʔʯ͕அ͢Δͷ wγϣοϓΦʔφʔʹ͓Βͤͯ͠ઃఆͯ͠͏ඞཁ͕ ͋Δ
૿੫ରԠͰͬͨ͜ͱ wαʔϏεར༻ྉͷফඅ੫૿੫ରԠ wͷফඅ੫૿੫ରԠ wܰݮ੫ͷઃఆͷఏڙ ࣌ࠁΛڥʹදࣔΛΓସ͑Δ ࠓճলུ w ૹྉͷ֎੫Խ w
ாථͷमਖ਼ ۠هࡌٻॻอଘํࣜ w ച্కΊॲཧͷεϓϦΫτͷमਖ਼
੫͕ద༻͞ΕΔλΠϛϯά
Ұ࣍ιʔεΛΑ͘ಡΉ
ࠃ੫ி
αʔϏεར༻ྉͷ੫ wલఏΧϥʔϛʔϦϐʔτͷαʔϏεར༻ྉԁ w݁ܖऴ͕ྃҎ߱ͷͱ͖ɺͷফඅ੫Ͱѻ͏ wࠃ੫ிͷ)1ΛΑΉ wIUUQTXXXOUBHPKQUBYFTTIJSBCFSVUBYBOTXFSTIPIJ IUN
ɹͷఏڙ ɹෛʹΑΔͷఏڙͷ࣌ظɺݪଇͱ͠ ͯɺͷҾ͠Λཁ͢Δෛܖʹ͋ͬͯ తͷશ෦Λͯ͠Ҿ͖ͨ͠ɺͷ Ҿ͠Λཁ͠ͳ͍ෛܖʹ͋ͬͯͦͷ ͨ͠ͷશ෦ͷఏڙΛྃͨ͠Ͱ͢ɻ ɹ·ͨɺෛΛআ͘ਓతͷఏڙͷ࣌ظ ɺݪଇͱͯͦ͠ͷਓతͷఏڙΛྃ͠ ͨͰ͢ɻ
ɹͷఏڙ ɹෛʹΑΔͷఏڙͷ࣌ظɺݪଇͱ͠ ͯɺͷҾ͠Λཁ͢Δෛܖʹ͋ͬͯ తͷશ෦Λͯ͠Ҿ͖ͨ͠ɺͷ Ҿ͠Λཁ͠ͳ͍ෛܖʹ͋ͬͯͦͷ ͨ͠ͷશ෦ͷఏڙΛྃͨ͠Ͱ͢ɻ ɹ·ͨɺෛΛআ͘ਓతͷఏڙͷ࣌ظ ɺݪଇͱͯͦ͠ͷਓతͷఏڙΛྃ͠ ͨͰ͢ɻ
αʔϏεར༻ྉͷ੫ wܖΛͰදݱ͢Δͱ ੫ U ੫ ੫ TUBSUFE@BU FOEFE@BU
Ձ֨ͷ੫͕ద༻͞ΕΔλΠϛϯά w݁Ձ֨ൃૹ࣌ͷ੫Λద༻͢Δ wʹडͨ͋͠ͱʹൃૹ w⾣ͷ੫͕ద༻͞ΕΔ wIUUQTXXXOUBHPKQMBXUTVUBUTVLJIPOTIPIJIUN ΛಡΉ
ʵʵɹ୨Էࢿ࢈ͷҾ͠ͷ͕͍ͭͰ͋ Δ͔ʹ͍ͭͯɺྫ͑ɺग़ՙͨ͠ɺ૬ख ํ͕ݕऩͨ͠ɺ૬खํʹ͓͍ͯ༻ऩӹ͕ Ͱ͖Δ͜ͱͱͳͬͨɺݕʹΑΓൢച ྔΛ֬ೝͨ͠ɺ֘୨Էࢿ࢈ͷछྨٴͼ ੑ࣭ɺͦͷൢചʹΔܖͷ༰ʹԠͯ͡ ͦͷҾ͠ͷͱͯ͠߹ཧతͰ͋ΔͱೝΊΒ ΕΔͷ͏ͪɺࣄۀऀ͕ܧଓͯ͠୨Էࢿ࢈ͷ ৡΛߦͬͨ͜ͱͱ͍ͯ͠ΔʹΑΔͷͱ ͢Δɻ
࣮
੫ΛͲ͏දݱ͢Δ͔ w੫͕ద༻͞ΕΔ࣌ࠁ wܰݮ੫͔Ͳ͏͔ ͕Θ͔Ε੫ٻΊΒΕͦ͏ wఆͰઃఆʹ͢Δ w%#ʹσʔλΛͨͤΔ
%#Ͱ੫Λදݱ͍ͨ͠ "id" "kind" "rate" "started_at" "expired_at" "created_at" "updated_at" 1 0
0.08 "2014-03-31 15:00:00" "2019-09-30 14:59:59.999999" "2019-07-16 09:44:39.516075" "2019-07-16 09:44:39.516075" 2 0 0.1 "2019-09-30 15:00:00" NULL "2019-07-16 09:44:39.519505" "2019-07-16 09:44:39.519505" 3 1 0.08 "2019-09-30 15:00:00" NULL "2019-07-16 09:44:39.521575" "2019-07-16 09:44:39.521575" UBYFTςʔϒϧര ࠓճͪ͜ΒΛ࠾༻
࣮ class Tax < ApplicationRecord enum kind: { ordinary: 0,
reduced: 1 } class << self def ordinary_rate(time = Time.current) # 10%ͷ੫༻ ordinary.where('started_at <= ?', time).order(started_at: :desc).first.rate end def reduced_rate(time = Time.current) # 8%(ܰݮ੫)༻ reduced.where('started_at <= ?', time).order(started_at: :desc).first.rate end end end
UBYFTςʔϒϧͷ 4&-&$5͕ͨΒͱଟ͍
%BUF5JNFΫϥεϛϦඵ·Ͱ࣋ͬͯΔ [1] pry(main)> Time.current.iso8601(7) => "2019-12-09T08:49:24.4245084+09:00" 5JNFDVSSFOUΛ͢ͱ࣮ߦ͢ΔͨͼʹΫΤϦ͕࣮ߦ͞ΕΔͷͰ ΫΤϦΩϟογϡ͕ޮ͔ͳ͍ ੫ܭࢉͷج४࣌Λ໌֬ʹҾͱͯ͢͜͠ͱͰಉ͡ΫΤϦΛ ు͖ग़ͤ͞ɺΫΤϦΩϟογϡΛޮ͔͢
IUUQTHJUIVCDPNDPMPSCPY TIPVIJ[FJ
4IPVIJ[FJ(FN w:BNMͰͷఆಡΈࠐΈ wܰݮ੫ରԠ w͜ͷࢿྉ࡞ͬͯΔ࠷தʹݟͯ͠ʮΑ͍ʜʯͱͳͬͨ irb(main):010:0> Shouhizei.rate_on(Time.current) => (1/10) irb(main):011:0> Shouhizei.rate_on(Time.current,
reduced: true) => (2/25)
Ͳ͕͍͍ͬͪͩΖ͏Ͷ w5BYʹґଘ͢Δ3FMBUJPOଘࡏ͠ͳ͍ͷͰఆͰͳ͍ wҰํͰফඅ੫ͱ͍͏σʔλΛ%#Ͱදݱ͢ΔͷࣗવͰ͋Δ wґଘ(FNগͳ͍΄͏͕ྑ͍ ࠓճͲͬͪΛબΜͰΑ͔ͬͨͱࢥͬͨɻ
࣌ࠁΛڥʹදࣔΛΓସ͑Δ
ͳͥඞཁʹͳ͔ͬͨ wϑϩϯτΤϯυͰΛڥʹදࣔΛΓସ͑ ͍ͨ w࣌ؒΛڥքͱ͢Δςετେม wͰ͖Δ͚ͩ୯७ʹݕূ͍ͨ͠
Ͳ͏͔ͨ͠ w"1*ͷϨεϙϯεʹl૿੫ޙͷใ͔ zͲ͏͔ͷϨε ϙϯεΛCPPMͰՃͨ͠ w࣌ࠁΛฦͯ͠ϑϩϯτΤϯυͰஅ͢ΔͷΛආ͚ͨ
"1*Ͱ࣌ࠁΛฦͯ͠ྑ͍ͷͰ wlใ͕࡞͞Εͨ࣌ࠁzͲ͏͔ͷϨεϙϯεΛՃ͢ ΔͱɺϑϩϯτΤϯυͰ࣌ࠁͷൺֱ͕ඞཁʹͳΔ wϑϩϯτΤϯυͷ࣌ࠁͷൺֱେม
ςετ
34QFDͰςετ࣌ࠁΛม͑Δ # spec/support/traveling.rb RSpec.configure do |config| config.include ActiveSupport::Testing::TimeHelpers config.around(:each, :travel_to)
do |example| travel_to(example.metadata[:travel_to]) do example.run end end end
34QFDͰςετ࣌ࠁΛม͑Δ # spec/support/traveling.rb RSpec.configure do |config| config.include ActiveSupport::Testing::TimeHelpers config.around(:each, :travel_to)
do |example| travel_to(example.metadata[:travel_to]) do example.run end end end IUUQTSFMJTIBQQDPNSTQFDSTQFD DPSFWEPDTIPPLTBSPVOE
͍ํ ྫ context '૿੫લͷͱ͖', travel_to: '2019/09/30 23:59:59' do # ੫8%Ͱ͋Δ͜ͱΛ֬ೝ͢ΔςετΛ͜͜ʹ͔͘
end wϒϩοΫͷதͰAUSBWFM@UPA͕ޮ͍ͯศར w !LBKJTIB͞ΜͷΞΠσΞͰ͢ɻ͋Γ͕ͱ͏͍͟͝·͢ɻ
DPOUFYUͷΓํ w૿੫લ૿੫ޙͰେ͖ͳίϯςΩετΛΔ wͦΕͧΕʹطଘͷςετΛίϐϖ͢Δ w૿੫ޙͷίϯςΩετΛ͢ wςετ૿͑Δ͕ɺޙย͚ ςετͷআ ͷͱ͖૿੫લͷίϯς Ωετʹணͯ͠ςετͷཧΛߦ͑ྑ͍ͷͰָ
૿੫ޙʹ͏·͍͔͘ͳ͔ͬͨ͜ͱ
͏·͍͔͘ͳ͔ͬͨ͜ͱ w૿੫ޙͷදࣔपΓͷෆ۩߹ग़ͯ͠·ͬͨ w"1*ͷςετ͕NBTUFSͰࣦഊ͢ΔΑ͏ʹͳ͍ͬͯͨ
NBTUFSͰςετ͕ίέͩ͢ w૿੫લʹQBTT͍ͯͨ͠ςετ͕ࣦഊͨ͠ w૿੫ޙͷमਖ਼࡞ۀʹӨڹ͕ग़ͨ wUSBWFM@UPͷઃఆΕͰ݄ʹ௨͍ͬͯͨςετ͕݄ʹࣦഊ͍ͯͨ͠ wϩʔΧϧͰະདྷ࣌ࠁʹมߋͯ͠ςετΛҰ௨ͨ͠΄͏͕Α͔ͬͨʜ
·ͱΊ wϑϩϯτΤϯυʹ࣌ࠁΛͣ͞ʹݟͤΔํ๏Λߟ͑Δ wมߋ͢Δ࣌ࠁ͝ͱʹίϯςΩετΛ࡞͓ͬͯ͘ͱޙָ͕ w๏ͷରԠେม ँࣙ !LZNNUϨϏϡʔ͋Γ͕ͱ͏͍͟͝·ͨ͠