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Node.jsのライブラリ周りでハマった話
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KSK
June 29, 2018
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Node.jsのライブラリ周りでハマった話
主にSequelizeのScopeの話
KSK
June 29, 2018
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Transcript
Node.js ͷ ϥΠϒϥϦपΓͰ ϋϚͬͨ ksk1030 / 2018.06.29 @NodeֶԂ 31࣌ݶ
ࣗݾհ ɾKeisuke Nakatane (@ksk1030) ɾORSO Inc. ৽نࣄۀ։ൃࣨ ɾαʔόɿΞϓϦɿϑϩϯτ ʹɹ̓ɹɿɹ̍ɹɿɹ̎ɹɹ͘Β͍ ɾલ৬ژͷήʔϜͰਓࣄ
Node.js ͷ ϥΠϒϥϦपΓͰ ϋϚͬͨ
None
Sequelize ɾNode.js ༻ͷOR Mapper ɹ- http://docs.sequelizejs.com/ ɹ- Rails Ͱ͍͏Active Record
ɾҰ൪ϝδϟʔͰΓ͍ͨ͜ͱͰ͖ͦ͏ ɾݹ͍ใώοτ͢ΔͷͰҙ (ver 3.x) ɹ- ࠷৽ ver 4.38 ͱ ver 5 Beta (2018/06/24)
ߏͬ͘͟Γ͜Μͳײ͡ ཧπʔϧ ΞϓϦ DB ΞϓϦAPI ཧπʔϧAPI
Ζ͏ͱͨ͜͠ͱ
λΠϜγϑτػೳ ɾσόοά༻ʹ staging ҎԼͰݱࡏ࣌ࠁΛ ɹِ͢Δػೳ ɾཧπʔϧ͔Β࣌ࠁΛߋ৽ ɾΞϓϦଆͷAPIͰ࣌ࠁࠩΛద༻͢Δ
None
Moment.js ɾΈΜͳେ͖ૢ࡞ܥϥΠϒϥϦ ɹ- σϑΝΫτελϯμʔυͬΆ͍ ɾ࣌ؒͷॲཧશͯ͜Ε wrap ͨ͠ͷʹ౷Ұ
ɾshiftSec ͕࣌ࠁͷࠩ ͜Μͳײ͡Ͱwrapͨ͠ import moment from 'moment-timezone' import shiftSec from
'../config/timeShift' if (process.env.NODE_ENV !== 'production') { moment.now = () => { return new Date().getTime() + shiftSec * 1000 } } export default moment
⚠ൃੜ⚠
Model ͷ Scope ͕ ػೳͯ͠ͳ͍ʁ
ɾSequelize ͷػೳ ɹ- http://docs.sequelizejs.com/manual/tutorial/scopes.html ɾڞ௨Խ͍ͨ͠ΫΤϦΛ model ʹఆ͓ٛͯ͘͠ ɹ- ʮϦϦʔεΛա͗ͨΧʔυʯͱ͔ Scope
ɾ$lte ” ≦ ”ʢLess Than or Equalʣ Scope const
now = moment() const Card = sequelize.define('card', { // Attributes }, { scopes: { released: { where: { releasedAt: { $lte: now }, }, }, }, }) Card.scope(‘releasedAt').findAll() // ϦϦʔεޙͷΧʔυͷΈ
ɾmodel ΞϓϦέʔγϣϯͷىಈ࣌ʹ ɹInitialize͞ΕΔ ɾScope ͦͷ࣌ͷݱࡏ࣌ࠁΛݩʹੜ ɾىಈޙʹ shiftSec ͕มΘͬͯߋ৽͞Εͳ͍ ݪҼ
Ͳ͏͠Α͏
ຖճҾ͢ʁ ɾείʔϓͷҾͰͦͷʹݱࡏ࣌ࠁͤ ɹରԠͰ͖Δ ɾ͕ɺ staging ҎԼͰ͔͠Θͳ͍ػೳͷ ɹ͍ͤͰԽ͢ΔͷΠϠͩ
Ϟσϧߋ৽ ɾ࣌ࠁ͕ࠩߋ৽͞ΕͨΒϞσϧߋ৽͢Δ ɾͨͩ͠ɺཧπʔϧ༻APIͱΞϓϦ༻API ɹผαʔόʹஔ͔Ε͍ͯΔ
ߏ͓͞Β͍ ཧπʔϧ ΞϓϦ DB ΞϓϦAPI ཧπʔϧAPI ߋ৽ϦΫΤετΛड͚Δ ϞσϧΛߋ৽͍ͨ͠
࠷ऴతʹ ɾDBͷϨίʔυͱɺϩʔΧϧϑΝΠϧʹ ɹshiftSec ʢݱࡏ࣌ࠁͱͷඵࠩʣΛ࣋ͭ ɾཧπʔϧͰߋ৽ͨ࣌͠ͰDBͷ͚ͩ ɹॻ͖Θ͍ͬͯΔ ɾΞΫηε͝ͱʹɺϩʔΧϧͱDBͷ shiftSec Λ ɹνΣοΫɺ͕ࠩ͋Εߋ৽
ͳΜͱ͔ͳͬͨ
՝ ɾϞσϧͷߋ৽ͱΞΫηε͝ͱͷࠩνΣοΫ ɹͪ͠ΌͬͯΔ͕ॏ͍ ɹ- staging ҎԼͳͷͰʹͳΓʹ͍͘ ɾͬͱ͍͍ߏ͕͋Γͦ͏ ɹ- Λ2ஈ֊Ͱ࣋ͬͯΔͷϒαΠΫ… ɹ-
ϞσϧΛͨ͠ϚΠΫϩαʔϏεԽʁ ɾ͔ͯύοέʔδͱ͔ͳ͍ͷ͔…ʁ
ͪͳΈʹ
defaultScope
defaultScope ɾ໌ࣔతʹॲཧ͠ͳ͚ΕࣗಈͰద༻ const Card = sequelize.define('card', { // Attributes },
{ defaultScope: { where: { isActive: true, }, }, }) Card.findAll() // scope ͷࢦఆͳ͠Ͱ acitve ͷΈ
ศརʹݟ͑Δ͕ Rails ք۾Ͱ
"ېஅͷՌ࣮"
None
None
"ېஅͷՌ࣮" ېढ
Active Record Ͱ ɾ෭࡞༻͕ଟ͍ ɹ- Β͵ؒʹϑΟϧλϦϯά͞ΕΔ ɹ- unscoped ͢Δͱଞͷ݅Ϧηοτ ɹ-
Πϯελϯεੜ࣌ʹ default ͕ೖΔ
͜Μͳײ͡ ʢ࣌ؒΒͣݕূෆेͰ͢ɻɻɻʣ class User < ApplicationRecord has_many :friends end class
Friend < ApplicationRecord belongs_to :user default_scope -> { where(is_goodlooking: true) } end User.first.friends # ͨͩ͠ΠέϝϯʹݶΔ User.first.friends.unscoped # “.first” ͷߜΓࠐΈ͕ແࢹ͞ΕΔ Friend.new # <id:nil, is_goodlooking:true … > ࠷ॳ͔ΒΠέϝϯ
Sequelize Ͱ Ͳ͏ͳͷ͔ʁ
ҙ֎ͱେৎͬΆ͍͔…ʁ ɾunscope ͱ defaultͷΫϦΞ // ϢʔβͷߜΓࠐΈޮ͍ͨ·· const firstUser = await
User.findOne() firstUser.findAll({ include: [{ model: Friend.unscoped() }], }) const newFriend = Friend.build() // { id: null }
݁ہͲ͏ͳͷʁ ɾΒ͵ؒʹϑΟϧλϦϯά͞ΕΔɺͱ͍͏ ɹέʔεग़ͯ͘Δ ɹ- Γཚ༻ݫېʂʂ❌ ɹ- ͏ͱͨ͠ΒɺϦϦʔε࣌ࠁ·Ͱຊ൪ڥʹ ɹ ઈରग़ͪ͠Ό͍͚ͳ͍ʹ Soft
Delete తʹ ʢ- Soft Delete ࣗମͷੋඇ͋Δʣ ɾͷΒͳ͍᠘͕·ͩ·ͩ͋Γͦ͏ͳ ɹؾ͢ΔͷͰੋඇڭ͍͑ͯͩ͘͞…$
Enjoy your ɹ Node.js life …