do-not-delete-softly - Speaker Deck

do-not-delete-softly

by MOROHASHI Kyosuke

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࿦ཧ࡟আΛ ͠ͳ͍ 2015-08-31 ࿦ཧ࡟আCasual Talks #1 @moro

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ॾڮګհ(@moro) Kyosuke MOROHASHI

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఻͍͑ͨ͜ͱ

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࿦ཧ࡟আͳΜͯ ͳ͔ͬͨ

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‣࡟আ͍ͯ͠ͳ͍ ‣࡟আ͍ͯ͠ͳ͍ͷͰ࡟আͱ ݺͿ΂͖Ͱͳ͍ɻ ‣ͥΜͥΜ࿦ཧతͰ΋softͰ ΋ͳ͍.

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࿦ཧ࡟আΛ  ͨ͘͠ͳΔͱ͖

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ઈ൛঎඼ʹ  ࡟আϑϥάΛ෇͚͍ͨ

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࣮ݱ͍ͨ͜͠ͱ ‣ ઈ൛ͨ͠঎඼Λ࿦ཧ࡟আͯ͠ɺ Ұཡ΍ݕࡧͰදࣔ͞Εͳ͍Α ͏ʹ͍ͨ͠ɻ ‣ ৽͘͠ߪೖ΋Ͱ͖ͳ͍ͨ͘͠ɻ

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ຊ౰ʹ”࡟আ”ͳͷ͔? ‣աڈʹങͬͨސ٬ͷߪങཤ ྺʹ͸දࣔ͢Δ ‣ച্ूܭͷର৅ʹͳΔ

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΄Μͱ͏ʹཉ͔ͬͨ͠΋ͷ status = :ઈ൛

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class Product < AR::Base scope :sellable, -> { where.not(status: :絶版) } end class ProductsController < AppC def index @products = Product.sellable.order(nantoka) end end class Backroom::ProductsController < AppC def index @products = Product.order(kantoka) end end

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default_scope :sellable   ΋ඇਪ঑ɻʮσϑΥϧτʯ ͡Όͳ͍Ͱ͢͠

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class Order < AR::Base default_scope -> { where(deleted_at: nil } end # 忘れた頃に def clean_old_orders(orders) orders.unscoped.destroy_all # さらに忘れた頃に clean_old_orders(Order.where(company_id: 42))

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ୀ৬ͨ͠ձһʹ ࡟আϑϥάΛ෇͚͍ͨ

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࣮ݱ͍ͨ͜͠ͱ ‣ୀձͨ͠ձһ͸ɺ  ϩάΠϯग़དྷͳ͍Α͏ʹɺ ࿦ཧ࡟আ͍ͨ͠

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ຊ౰ʹ”࡟আ”ͳͷ͔? ‣ ͦͷձһͷσʔλ͸Ͳ͏ͳΔ? ‣ a: ͥΜͿফ͢ ‣ b: ͦͷ··࢒͢ ‣ c: ಗ໊ͱͯ͠࢒͢ ‣ d: γεςϜϢʔβ΁෇͚ସ͑

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ຊ౰ʹ”࡟আ”ͳͷ͔? ‣a: ͥΜͿফ͢ ‣ ফ͠·͠ΐ͏!!! ‣ ෆ҆ͳΒඞཁͳͱ͜Ζ͚ͩ ΞʔΧΠϒ

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ຊ౰ʹ”࡟আ”ͳͷ͔? ‣b: ͦͷ··࢒͢ ‣ ୀձձһΛ status = :ログイン不可 ʹ͢Δ  (status͸ͦΕ͸ͦΕͰ pros/cons ͋Δ΋ͷͷ…) ‣ೝূ৘ใ͚ͩফ͢

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ຊ౰ʹ”࡟আ”ͳͷ͔? ‣c: ಗ໊ͱͯ͠࢒͢ ‣ݸਓ৘ใͳͲΛফ͢Α͏ɺ ॲཧΛ଍͢

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ຊ౰ʹ”࡟আ”ͳͷ͔? ‣ d: γεςϜϢʔβ΁෇͚ସ͑ ‣ͦ͏͍͏ॲཧΛ଍͢

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ຊ౰ʹ”࡟আ”ͳͷ͔? ‣ a: Ҏ֎͸ʮ࡟আʯ͍ͯ͠ͳ͍ ‣ a: Ұॹʹফ͢ ‣ b: ͦͷ··࢒͢ ‣ c: ಗ໊ͱͯ͠࢒͢ ‣ d: γεςϜϢʔβ΁෇͚ସ͑

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ʮ࿦ཧ࡟আʯͰ͸ͳ͘  ΍Γ͍ͨ͜ͱʹԊͬͨઃܭΛ

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อ؅ظݶͷ ա͗ͨσʔλʹ ࡟আϑϥάΛ෇͚͍ͨ

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࣮ݱ͍ͨ͜͠ͱ ‣ҰఆظؒҎ্ݹ͍σʔλΛ ࿦ཧ࡟আ͠ɺҰཡʹදࣔ͞ Εͳ͍ͨ͘͠ɻ

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ຊ౰ʹ”࡟আ”ͳͷ͔? ‣ ϩάΛऔͬͯফ͢ɻ ‣ ࡟আͰ͖ͦ͏ɻ ‣ ؂ࠪʹඞཁetcͳͲͳΒ࢒͢ɻ

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ຊ౰ʹ”࡟আ”ͳͷ͔? ‣ٯʹߟ͑Δɻ ‣ Ұཡʹදࣔ͢Δ߲໨Λ  ৽͍͠΋ͷ͚ͩʹ͢Δɻ ‣ σʔλྔͷݒ೦ͱɺUXͷ  ݒ೦͸ͦΕͧΕผͷ໰୊ɻ

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default_scope と同じ問題一番最初の画面に出すもの、がデフォルトなわけではない。

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ͳͥ࿦ཧ࡟আΛ ͢΂͖Ͱͳ͍ͷ͔  (reprise)

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‣ࢭΊ͕࣌Θ͔Βͳ͍ɻ ‣ શςʔϒϧʹ࡟আϑϥά ‣ ͭͶʹJOINͯ͠ϑϥάνΣοΫ

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‣σʔλͷऴΘΓΛ  ઃܭͰ͖͍ͯͳ͍ɻ ‣ઃܭͰ͖͍ͯͳ͍ͷͰ  ࢭΊ͕ܾ࣌ΊΒΕͳ͍ɻ

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ͳͷʹʮ࿦ཧ࡟আʯͰ  Կ͔ΛݴͬͨงғؾʹͳΔɻ   ࢛จࣈख़ޠ͜Θ͍ɻ

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࿦ཧ࡟আΛ  ͠ͳ͍

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‣σʔλͷʮऴΘΓํʯΛ  ;ͭ͏ʹઃܭ͢Δɻ ‣࢛จࣈख़ޠͰԿ͔Λ  ݴͬͨؾʹͳΒͳ͍ɻ

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͋ΘͤͯಡΈ͍ͨ: http://qiita.com/Jxck_/items/156d0a231c6968f2a474

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‣σʔλͷʮऴΘΓํʯΛ  ;ͭ͏ʹઃܭ͢Δɻ ‣࢛จࣈख़ޠͰԿ͔Λ  ݴͬͨؾʹͳΒͳ͍ɻ