RubyͱRailsͷԿ͕ڧ͍ͷ͔ ෢ऀ থل 

Software Engineer, Senior Expert at WED Inc. ✓Ruby Committer / ex. FreeBSD Committer ✓Huginn (⭐37k) Co-maintainer ✓Hammerspoon (⭐9.8k) Contributor Writes Production Code In Ruby / TypeScript / Go / Lua ෢ऀ থل (Akinori Musha) @knu on GitHub and Twitter 

୺తʹݴ͏ͱɺ ͱͯͭ΋ͳ͍ॊೈ͞Λ͍࣋ͬͯΔ RubyͱRailsͷڧΈͱ͸ ཭ΕͯΈΔͱ࿀͘͠ͳΔڧΈΛৼΓฦΔ 

Rails͸ࠓ΋ੜ࢈ੑͷ࠷దղͷͻͱͭ • ϏϡʔΛ࣋ͨͳ͍APIαʔόͰ͋ͬͯ΋ڧΈ͕ͨ͘͞Μ͋Δ • Ή͠ΖϑϩϯτΤϯυ͸JS/TSʹ೚͍ͤͨ • RubyͱRails͸ϏδωεϩδοΫΛॻ͘ͷʹదͨ͠ݴޠͱϑϨʔϜϫʔΫ • جຊޠኮ͕๛෋ͰɺυϝΠϯʹదͨ͠৽͍͠ޠኮΛ૿΍͢ͷ΋ಘҙ • ΍ΓͱΓ͢ΔΦϒδΣΫτ͕΄΅ActiveRecord ModelΠϯελϯε΍RelationΦϒδΣΫτʹدΔͷ Ͱɺ΄΅self-documented, ݟΔ࣮૷͕ܾ·͍ͬͯΔͷͰಈతܕ෇͚ͷऑΈ͕໨ཱͪͮΒ͍ • ActiveRecordͷྫ֎ͱrescue_fromʹΑΔิ଍ػߏ͕RESTͱ͔ͬͪΓϋϚ͍ͬͯΔ 

ActiveRecord͕ڧ͍ • CRUD: ܕม׵΍όϦσʔγϣϯΛ׬උ • ৚݅ݕࡧɺJOINɺूܭɺࢥ͍ͷ·· • ·ͱ΋ͳSQLΛ࡞ͬͯ͘ΕΔ • DRYͷపఈ • DBͷεΩʔϚͱstructఆٛΛೋॏ؅ཧ͠ͳ͍͍ͯ͘ • default஋΋ಡΜͰ͘ΕΔ 

ActiveRecord Migration͕ڧ͍ • ฒߦ։ൃ΍ॱෆಉͷσϓϩΠʹ଱͑Δόʔδϣϯ؅ཧ • ݸʑͷϚΠάϨʔγϣϯʹ͍ͭͯద༻ঢ়ଶ͕؅ཧ͞Ε͍ͯͯɺݸผʹup/down΋Մೳ • DDL΋DML΋ྲྀͤΔ • Ϗϡʔ΍ϑΝϯΫγϣϯͷྨ΋௥ՃgemͰεΩʔϚͷҰ෦ͱͯ͠؅ཧՄೳ • σʔλϕʔεΤϯδϯΛ࢖͍౗ͤΔʂ GoͰۤ࿑͠·ͨ͠😝 

Sidekiq͕ڧ͍ • खܰʹδϣϒΛ࡞͙ͬͯ͢࢖͑Δ • PubSubͩͱTerraformͰτϐοΫΛ৽ઃͯ͠ϫʔΧʔʹsubscriberΛ༻ҙͯ͠… • ߴ౓ͳྲྀྔ੍ޚ΍ॏෳɾഉଞ੍ޚ͕ඞཁʹͳͬͯ΋༰қʹରԠ • Sidekiq Pro/EnterpriseΛങͬͯ΋͍͍͠ɺOSSͷιϦϡʔγϣϯ΋๛෋ 

RSpec͕ڧ͍ • ͳΜͰ΋ϞοΫͰ͖Δ • ΠϯλϑΣʔεΛ෼཭ఆٛͨ͠Γ͠ͳͯ͘΋͢΂͕ͯTest Ready • σʔλϕʔεͷΫϦΞͳͲͥΜͿRails+RSpecଆͰ໘౗Λݟͯ͘ΕΔ • E2EςετʢFeature specʣ΋ඪ४૷උ 

Rails console͕ڧ͍ • ௐࠪ΍σʔλෆ੔߹ͷۓٸमਖ਼ɺόονॲཧͷϦϋʔαϧͳͲʹେ׆༂ • ίϯύΠϧ΋σϓϩΠ΋ͳ͠ʹɺ೚ҙͷϏδωεϩδοΫΛݺͼग़ͤΔ • όονॲཧͷྨ͸֎෦αʔϏε࿈ܞ΋ଟ͘ɺϫϯγϣοτͩͬͨΓ΋ͯ͠ɺ೦ೖΓͳςε τΛॻ͍͔ͯΒ࣮૷͢Δίετ͕·ͬͨ͘ݟ߹Θͳ͘ײ͡Δ͜ͱ΋ଟ͍ • ͦΜͳͱ͖ɺ։ൃ؀ڥ΍εςʔδϯά؀ڥͰRails console͔Β൓෮ࢼߦͯ֬͠ೝͰ͖Δ͜ ͱ͸େ͖ͳ෢ث ͜Εຊ౰ʹݟա͕ͪ͝͠😳 

୺తʹݴ͏ͱɺ ։ൃମݧͰޙΕΛऔ͍ͬͯΔ RubyͱRailsͷऑΈͱ͸ ཭ΕͯΈΔͱ໭Γͨ͘ͳ͘ऑΈΛৼΓฦΔ 

Rubyͷ։ൃମݧ͸ϋοϐʔͳΜ͡Όͳ͍ͷʁ 👍 ҙਤΛࣗ༝ʹදݱͰ͖ΔɺറΓ͕গͳ͍ • ݴޠͷ੍໿ճආͷςΫχοΫ͕ཁΒͳ͍ • ʮͨΊͷʯσβΠϯύλʔϯɺΠϯλʔϑΣʔε͕ͳ͍ 👎 ੍໿Λදݱɺڧ੍͢Δޠኮʹ๡͍͠ • ಡΈखʹͱͬͯͷώϯτɺΠϯλϓϦλʹͱͬͯͷώϯτ • ॻ͖खͷϛε๷ࢭ 

ॳΊͯ͞ΘΔਓʹ΋΍͘͞͠… • ϕʮRubyͰ͸͜Μͳ෩ʹॻ͚ΔΑʯ • ॳʮ͍͢͝ɺ؆ܿͰ͔͍͍ͬ͜Ͱ͢Ͷʂʯ • ॳʮʢͰ΋ଞͷݴޠʹԠ༻ޮ͔ͳ͍஌ࣝͩ…ʣʯ • ॳʮͥΜͥΜิ׬ީิ͕ग़ͯ͜ͳ͍Μ͚ͩͲΈͳ͞ΜͲ͏΍ͬͯઃఆͯ͠ΔΜͰ͔͢ʁʯ • ϕʮ͍͢͝ϓϥάΠϯઃఆͱ͔ಛʹͳͯ͘ɺΈΜͳۭͰॻ͍ͯ·͢… 
 ͦΕ͔RubyMine࢖ͬͯΈΔʁʯ • ॳʮʢࢧԉͳ͠Ͱॻ͘ͷ·͔͡…ʣʯ TypeScript/Go/Kotlin͸ݴΘͣ΋͕ͳɺ΋͸΍Python΋PHP΋ܕΞ ϊςʔγϣϯΛॻ͘͠ఆٛδϟϯϓΛ͹Μ͹Μ࢖͏ͷ͕;ͭ͏😇 

LinterΛࣂ͍׳Β͢ͷ͕େม • RubocopͷσϑΥϧτઃఆ͕ͭΒ͍ • ίϛϡχςΟʔϕʔεͱ͍͏ͷ͕ۂऀͰɺ௚ͤͱݴΘΕΔ͕ཧ༝͕ෆ໌ͳͷͰ࠷ॳ͔Β ܗ֚Խ͍ͯ͠Δ • ࣗಈϑΥʔϚολʔͱͯ͠͸ಈ࡞͕஗͗͢Δ • อଘ࣌ࣗಈ੔ܗʹͯ͠ؾܰʹηʔϒͰ੔ܗɺͱ͍͕ͨ͠਺ඵֻ͔ΔͷͰମݧ͕ྑ͘ͳ͍ 

ܕ෇͚ରԠΛ΋ͬͱ͕Μ͹Γ͍ͨ • ܕ͸΋͸΍ݱ୅ϓϩάϥϚʔͷϝϯλϧϞσϧʹ͍ࠜͯ͟͠Δ • Ή͠ΖίʔυͷҙਤͷҰ෦ͱͯ͠ܕΛॻ͖͍ͨͰ͟͝Δ • ผϑΝΠϧ؅ཧ͸͠ΜͲ͍.rbs (.rbi) • ΤσΟλͰΠϯϥΠϯදࣔɾฤूͰ͖Ε͹؇࿨ʁ • SorbetʹΑΔΞϊςʔγϣϯ΋DRYʹͳ͍ͬͯͳ͍ • ϝιουͷԾҾ਺ɺಛʹΩʔϫʔυҾ਺ͷೋ౓ॻ͖͕ͩΔ͍ 

ͦΕͰ΋… 
 RubyͱRails͸ڧ͍ มԽΛแ༰͢Δྗ 

͜Ε͕మ൘ߏ੒✨ RailsϞϊϦεͷपΓʹϚΠΫϩαʔϏε • ߴϨΠϠʔΛ୲͏ʹ;͞Θ͍͠ॊೈੑ • GoͰ֎෦γεςϜ࿈ܞόοΫΤϯυΛॻ͍ͯRails͔ΒgRPC • PythonͰը૾ॲཧαʔϏεΛॻ͍ͯSidekiq͔Β࣮ߦ • LP΍ಛઃαΠτ͸Nuxt.js΍FreshͰָ͘͠ॻ͘ 

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