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RailsとYesodの比較
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Fujimura Daisuke
April 21, 2012
Programming
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2.5k
RailsとYesodの比較
Fujimura Daisuke
April 21, 2012
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Transcript
RailsͱYesodͷൺֱ ౻ଜେհ Sunday, April 22, 12
ࣗݾհ • ౻ଜେհ • גࣜձࣾAiming • @ffu_ • http://fujimuradaisuke.com Sunday,
April 22, 12
ࣗݾհ (2) Rubyͱࢲ • ੲABAPerͩͬͨɻ·ͱͳݴޠ͕Γͨ͘ͳΓRubyʹస • ͔Ε͜Ε3͘Β͍ϑϧλΠϜͰRailsͷࣄΛͯ͠Δ • Railsίϛολ @a_matsuda
ࣄͯ͠Rails෦ʹ͚ͬ͜͏ৄ͘͠ͳͬͨ • WEB+DB PRESSͷRails3ಛूΛͪΐͬͱखͬͨ • Railsͷ࡞ऀɺDHHͱ൴ͷಇ͘37signalsͷϑΝϯ Sunday, April 22, 12
ࣗݾհ (3) Haskellͱࢲ • The Little SchemerͰؔϓϩάϥϛϯάΛΔ • Seven Languages
in Seven WeeksͰHaskellΛΔ • ελʔτHaskellͰຊ֨తʹHaskell͕͖ʹͳΔ • ݱࡏɺձࣾͰYesodΛࢼݧతʹಋೖத Sunday, April 22, 12
ΞδΣϯμ • Railsʹ͋ͬͯYesodʹͳ͍ͷհ • Rails͍͔ΒݟͨYesod(ͱHaskell)ͷ͍͍ͱ͜Ζ • Yesodʹཉ͍͠ͷհ Sunday, April 22,
12
Yesodʹͳ͍ͷ(1) σϓϩΠπʔϧ • RailsʹCapistranoͱ͍͏σϓϩΠࣗಈԽπʔϧ͕͋Γ·͢ɻ • $ cap deploy ͰσϓϩΠ •
$ cap deploy:rollbackͰલճσϓϩΠͨ͠ίʔυʹϩʔϧόοΫ • ͦͷଞɺSSHͰೖͬͯσϓϩΠ࣌ʹߦ͏࡞ۀͷࣗಈԽҰൠ͕ՄೳͰ͢ɻ • https://github.com/capistrano/capistrano/wiki/2.x-Getting-Started Sunday, April 22, 12
Yesodʹͳ͍ͷ(1) σϓϩΠπʔϧ • cabal-dev ΛͬͨΒͰ͖·ͨ͠… • ͨͩ͠ຖճશґଘϥΠϒϥϦΛΠϯετʔϧ͢ΔͷͰ͕͔͔࣌ؒΔ • ͦͦHaskellerͱͯ͠ʮRubyͷπʔϧΛ͏ʯͰOKͳͷ͔ʁ Sunday,
April 22, 12
Yesodʹͳ͍ͷ(2) CRUDͷੜ • RailsscaffoldͰCRUD͕Ͱ͖Δίʔυ͕ੜ͞Ε·͢ɻ • ͜ͷҐͷίʔυ͕ ੜ͞ΕΔ • RailsྲྀͷRESTfulͳϧʔςΟϯάʹԊͬͨίʔυ͕ੜ͞ΕΔͷͰɺͦΕΛݩ ʹ։ൃ͍ͯ͠ΕɺࣗવͱRailsతͳΘ͔Γ͍͢ίʔυʹͳΓ·͢ɻ
• ࣗવͱRails wayͰ։ൃ͢Δ͜ͱʹͳΔͷͰɺ·ͳ͍ͰࡁΉͱ͍͏རɻ • YesodͰ·ͣ։ൃΛਐΊΒΕΔఔʹscaffoldͰίʔυΛੜͯ͠΄͠ ͍ɻ Sunday, April 22, 12
Yesodʹͳ͍ͷ(3) RSpec • ΄΅σϑΥϧτ࠾༻͞ΕͯΔςετϑϨʔϜϫʔΫɻ • ಈ࡞ݕূͰͳ͘ιϑτΣΞͷʮৼΔ͍ʯΛܾΊΔͨΊͷϥΠϒϥϦ • http://jp.rubyist.net/magazine/?0021-Rspec ʹ֓ཁ͕·ͱ·ͬͯ·͢ɻ •
rspec-railsͱ͍͏ϥΠϒϥϦͰRailsͷςετ͕ܹ͘͠ੜ࢈తʹͳΓ·͢ɻ • ͦͷଞपลϥΠϒϥϦଟɻ Sunday, April 22, 12
ͳͥRSpec͕ཉ͍͔͠ • RSpecઃܭπʔϧͱͯ͠ຊʹ༏लɻ·ͣSpecΛεέονײ֮Ͱॻ͍ͯҰ ୴ઃܭΛจষԽ͢ΔͱɺAPIશମ͕ݟ௨ͤΔΑ͏ʹͳΓ·͢ɻ͜͜Ͱઃܭͷྑ ͠ѱ͠Λݕ౼Ͱ͖ΔͷૉΒ͍͠Ͱ͢ɻ ͜Μͳ۩߹ʹઃܭΛઌʹॻ͘ ࣮ߦ͢Δͱ“PENDING” Sunday, April 22,
12
ͳͥRSpec͕ཉ͍͔͠ • request specཉ͍͠Ͱ͢ɻrequest specSeleniumͳͲͰ࣮ࡍʹΞϓϦέʔ γϣϯΛಈ͔ͯ͠ɺϑϩϯτΤϯυ͔ΒΞϓϦέʔγϣϯΛݕࠪ͢Δ Έɻclick_link(‘#submit-button’)ͱ͍ͬͨײ͡ͰखಈͰ͍ͯͨ͠ಈ࡞֬ೝΛࣗ ಈԽͰ͖·͢ɻ • ਅʹॻ͘ͱɺ࣮ߦՄೳͳड͚ೖΕςετܭըॻʹͳΓ·͢ɻ
• ෳͷػೳΛ·͙ͨγφϦΦςετ͕ॻ͖͍͢ɻ • ͜͜ɺRails͜ͷϨΠϠʔ·Ͱςετ͢Δͷ͕σϑΥϧτɻ Sunday, April 22, 12
ͳ͍ͷ(3) RSpec • ͪͳΈʹHaskellͰhspecͱ͍͏RSpecతͳϥΠϒϥϦ͕͋Γ·͢ɻ • http://hspec.github.com/ • ࠷ۙ1.1ʹͳΓ·ͨ͠ʂ • ͔͠͠ɺdescribe/contextͷೖΕࢠͰ͖ͳ͍͠ɺsetup/teardownແ͍͠ɺ
RSpecʹࣅͨߏจͷxUnitͱ͍͏ͷ͕࣮…ɻ • ࠓޙʹظɻ Sunday, April 22, 12
Rails͍͔ΒݟͨYesod(ͱHaskell)ͷ͍͍ͱ͜Ζ • NullPointerException͕ແ͍ʂ • ܕΛ͋ΘͤΔͱ͍͍ͩͨظ௨Γʹಈ͘ • undefinedΛ͏ͱςετίʔυͳ͠ͰBDDͬΆ͍͜ͱ͕Ͱ͖Δ • ى͜Γ͏Δ͜ͱΛશ෦ߟྀ͠ͳ͍ͱ͍͚ͳ͍ͷͰɺఆΕͷόά͕ͳ͘ͳ Δ
• ΞυϗοΫଟ૬͕RubyͷMix-inͱࣅ͍ͯΔͷͰ͠Έ͍͢ Sunday, April 22, 12
Yesodʹཉ͍͠ͷ(1) • ϏδωεϩδοΫΛهड़͢ΔͨΊͷϥΠϒϥϦ • PersistentΑΓ͏ͪΐͬͱநߴ͍هड़͕͍ͨ͠Ͱ͢ɻ • RailsͰActiveRecordͰϢʔβʔͷϝϯλϧϞσϧʹ͍ۙܗͷදݱ͕Ͱ͖ ͨɻ • ͱ͍ͬͯORϚούʔΛ࡞Δͷҧ͍·͢ΑͶɻDCI
͕ࢀߟʹͳΔؾ͕͠ ͍ͯ·͢ɻ • ࡞ͬͯΈ͍ͨͰ͢ɻ Sunday, April 22, 12
Yesodʹཉ͍͠ͷ(2) • Yesod way • RailsʹϨʔϧ͕͋ͬͯɺͦΕʹΕΔɻ • DHHᐌ͘ʮConstraints are liberatingʯ
• ࠓͷͱ͜ΖYesodʹϨʔϧ͕ݟͨΒͳ͍ɻ Sunday, April 22, 12
͓ΘΓ • ए͍ϥΠϒϥϦͳͷͰɺࠓޙʹظͰ͢ Sunday, April 22, 12
༨ஊ • ςϯϓϨʔτΤϯδϯͷ…ʁ • ձࣾͰ࡞ͬͯΔͷJSON APIͳͷͰɺ৮ͬͯͳ͍ΜͰ͢ɻ • ͠ΔͳΒmustacheΛ͏ͱࢥ͍·͢ɻShakespearean Templatesϑ ϩϯτΤϯυͷਓͱͷίϥϘϨʔγϣϯ͕ͦ͠͏ͳҹͰ͢ɻ
• scottyؾʹͳͬͯ·͢ • Web API࡞ΔͷͰ͋Εͬͪ͜ͷ΄͏͕खܰͦ͏ Sunday, April 22, 12