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RailsΛֶͼɺݱ৔ʹೖΔ·Ͱ RAILS DEVELOPERS MEETUP 2017 LT @KOJI MIKAMI

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ࠓ೔࿩͢͜ͱ

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֓ཁ Railsྺ = ΤϯδχΞྺ

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֓ཁ RailsΛֶͼɺݱ৔ʹೖΔ·Ͱ ▸ νϡʔτϦΞϧԿप͔΍ΔˠݸਓͰΞϓϦέʔγϣϯॻ͍ͯΈΔ ▸ ݱ৔ʹೖΔˠ͍͔ͭ͘ͷนʹͿͪ౰ͨΔ ▸ Ͳ͜Ͱͭ·ͮ͘ͷ͔ ▸ ϝϯλʔ΍·ΘΓͷϝϯόʔ͸Ͳ͜ΛϑΥϩʔ͢Ε͹Α͍ͷ͔ ▸ ࢲ͕Ϳ͔ͭͬͨนΛέʔεελσΟͰ͓ૹΓ͠·͢

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ຊ୊ Զ͕Ϳ͔ͭͬͨนʢ࣮࿩ʣ ▸ ίʔυϨϏϡʔ͕௨Βͳ͍ ৽ػೳ࣮૷͢Δͧʂ

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ຊ୊ Զ͕Ϳ͔ͭͬͨน ▸ ίʔυϨϏϡʔ͕௨Βͳ͍ Ͳ͏͍͏ઃܭ͕ ͍͍Μͩʂ

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ຊ୊ Զ͕Ϳ͔ͭͬͨน ▸ ίʔυϨϏϡʔ͕௨Βͳ͍ ࣮૷ऴΘͬͨʂ PRग़ͧ͢ʂ

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ຊ୊ Զ͕Ϳ͔ͭͬͨน ▸ ίʔυϨϏϡʔ͕௨Βͳ͍

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ຊ୊ Զ͕Ϳ͔ͭͬͨน ▸ ίʔυϨϏϡʔ͕௨Βͳ͍ ίϝϯτ͕ͨ͘͞Μ෇͍ͯർฐ…

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ຊ୊ Զ͕Ϳ͔ͭͬͨน ▸ Ͳ͏ͯ͜͠Μͳʹίϝϯτ͕෇͍ͨͷ͔ ▸ ActiveRecordΛ͏·͘࢖͍͑ͯͳ͍ ▸ Ͳ͜ʢMVC, etc…ʣʹͲ͏࣮૷͢Δͷ͕ྑ͍͔͋΍;΍ʹͳͬ ͍ͯΔ

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Զ͕Ϳ͔ͭͬͨน ▸ ActiveRecordΛ͏·͘࢖͍͑ͯͳ͍ ▸ N+1ΫΤϦΛ࡞͍ͬͯΔʢద੾ʹϩʔυͰ͖͍ͯͳ͍ʣ ▸ ςΩτʔʹincludes͢Δ
 k0kubun͞ΜͷʮActiveRecordͷjoinsͱpreloadͱincludesͱeager_loadͷҧ͍ʯΛಡΈ· ͠ΐ͏ https://qiita.com/k0kubun/items/80c5a5494f53bb88dc58 Case 1.

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Զ͕Ϳ͔ͭͬͨน ▸ Ͳ͜ʹ࣮૷͢Δ͔Ͱ೰Ή ▸ ActiveRecordʹҾ͖ͮΒΕΔ ▸ σϑΥϧτͷϨΠϠʔͱͷҧ͍ Case 1.

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Case 2. ActiveRecordܧঝ͠ͳͯ͘΋ྑ͍ͷ͔Α ▸ ActiveRecordύλʔϯ
 σʔλϕʔεͷςʔϒϧ΍ϏϡʔͷྻΛϥοϓ͠ɺσʔλϕʔεΞΫηεΛΧϓ ηϧԽ͠ɺυϝΠϯϩδοΫΛ௥Ճ͢ΔΦϒδΣΫτ[1] [1] http://bliki-ja.github.io/pofeaa/ActiveRecord/ Ϟσϧ = ActiveRecordΛඞͣܧঝ ςʔϒϧ : Ϟσϧͩͱࢥͬͯ͠·͏

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ActiveRecordΛܧঝ͠ͳ͍ϞσϧΛ࡞ͬͯ΋ྑ͍ ▸ ςʔϒϧͷͳ͍FormͰActiveModelϞδϡʔϧΛ࢖͏ ▸ ActiveModel::ValidatorΫϥεΛ࢖ͬͯόϦσʔλΛ෼཭͢Δ ▸ Ϣʔεέʔεͱͯ͠ߟ͑Δ
 →ςʔϒϧͱ1:1Ͱඥ෇͔ͳ͍ϞσϦϯάʹͭͳ͕Δ
 →αʔϏεΦϒδΣΫτͱͯ͠෼཭͢Δͷ΋͋Γ ৄ͘͠͸joker͞ΜͷʮͯΊ͑ΒͷRails͸ΦϒδΣΫτࢦ޲͡ΌͶ͑ʂ·ͣ͸CallbackΫϥεɺValidatorΫϥεΛ׆༻͠ ΖʂʯΛಡΜͰΈ͍ͯͩ͘͞ https://qiita.com/joker1007/items/2a03500017766bdb0234 Case 2.

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ϓϩδΣΫτͰαʔϏεΦϒ δΣΫτಋೖͯ͠Δਓʁ Case 2.

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ϨΠϠʔͰ೰Ή Case 3. rails new ྫ: Ϛετυϯ

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ϨΠϠʔͰ೰Ή ྫ: Ϛετυϯ Զͷ஌ͬͯΔߏ଄͡Όͳ͍… rails new Case 3.

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σϑΥϧτͷ··։ൃ͢ΔϝϦοτ ▸ νʔϜͰೝࣝΛἧ͑΍͍͢ ▸ ࣮૷ՕॴͰ೰Ή͕࣌ؒݮΔ ▸ ϨʔϧΛ֎Εʹ͍͘ Case 3.

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ϨΠϠʔΛ௥Ճ͢ΔϝϦοτ ▸ ϑΝοτϞσϧɺϑΝοτίϯτϩʔϥʔΛճආ ▸ ςετॻ͖΍͍͢ ▸ ϝϯς͠΍͍͢ Case 3.

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ϦʔυΤϯδχΞʹઃܭͷҙਤΛฉ͜͏ Case 3.

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͓ΘΓʹ ݁࿦ ‣ joker͞ΜͷʮԶ͕ѱ͔ͬͨɻૉ௚ʹؒҧ͍ΛೝΊΔ͔Βɺ΋͏αʔϏεΫϥεͱ͔࡞ Δͷ͸ࢭΊͯ͘ΕʯΛಡΉ
 https://qiita.com/joker1007/items/25de535cd8bb2857a685 ‣ onk͞Μͷʮ;ͭ͏ͷRailsΞϓϦέʔγϣϯ։ൃʯΛݟΔ
 railsdm#2ͷൃදͰ͢Ͷ
 https://www.slideshare.net/takafumionaka/rails-77195340 ‣ Sandi MetzͷʮΦϒδΣΫτࢦ޲ઃܭ࣮ફΨΠυʯΛಡΉ

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THANK YOU!!