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Active Record ʹ͍ͭͯߟ͑Δ 2018/09/26 Fukuoka.rb #107 Rails LT ಛू ODA Hirohito

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͜ͷ LT େձͰ https://cdg.connpass.com/event/89504/

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͜Μͳ LT Λͨ͠ https://speakerdeck.com/oda/rubykaigi-2018-de-not- accepted-saretaneta

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ͦͷ LT ͷதͰ

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͜Μͳωλ͕͋ͬͨ

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CLOMO MDM ͱ͸ʁ

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ΤΫεϙʔτػೳ

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ΤΫεϙʔτػೳ

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΍ͬͨ͜ͱ

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΍ͬͨ͜ͱ

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΍ͬͨ͜ͱ

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΍ͬͨ͜ͱ

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Α͘ݴΘΕΔ Rails ͷ
 ύϑΥʔϚϯεվળํ๏

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Active Record Λ 0.0 msec ʹ͠Α͏ʂ

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= Active Record Λ࢖Θͳ͍

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औΒΕΔબ୒ࢶ • ੜ SQL • Arel • ͦͷଞ

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͜ͷ৔߹͸ੜ SQL Λબ୒ͨ͠

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͜͜Ͱൃੜ͢Δٙ໰

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Ұͭͷ SELECT จͰ CSV શཁૉΛ औಘ͢Δ͜ͱ͸ Active Record Ͱ ࣮ݱͰ͖ͳ͔ͬͨͷ͔ʁ

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͜Μͳهࣄ͕͋ͬͨʢ2013/06/03ʣ http://www.atmarkit.co.jp/ait/articles/1306/03/news057.html

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͜Μͳهࣄ͕͋ͬͨʢ2013/06/03ʣ http://www.atmarkit.co.jp/ait/articles/1306/03/news057.html

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2013/06/27
 Rails ver. 4.0 ϦϦʔε

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͜ΕΛ౿·͑ͨ͏͑Ͱ

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ڪΒ͘Ͱ͖ͳ͍

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ڽͬͨ͜ͱΛ΍Ζ͏ͱ͢Δͱ
 Active Record ͕଍ᐫʹͳΔ
 ৔߹͕͋Δ

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ಛʹύϑΥʔϚϯεվળʹ
 ͓͍ͯ͸ݦஶͩͬͨ

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Active Record ͸ෆཁʁ

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NO!!!

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ෆཁͳΒ͹ Rails ͔Βফ͑
 ୅ସ ORM ͕࠾༻͞ΕΔ͸ͣ

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͔͠͠ɺ࢖ΘΕଓ͚͍ͯΔ

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͜Μͳهࣄ͕͋ͬͨʢ2013/06/03ʣ http://www.atmarkit.co.jp/ait/articles/1306/03/news057.html

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ػೳ < ن໿

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ػೳ < ن໿ CoC
 (Convention over Configuration)

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·ͱΊ • Active Record ͸ CoC ʹج͍͍ͮͯΔ • Active Record ΛࣺͯΔ୅ঈ͸େ͖͍ • Active Record Λਂ͘஌Ε͹஌Δ΄Ͳ
 Active Record ͷํ͕ศརʢͳ͸ͣʣ

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͝੩ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠