The three great virtues are important

銀座Rails #39 招待講演
https://ginza-rails.connpass.com/event/229348/

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   جૅٕज़ The three great virtues are important
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56. w ϓϩμΫτ΁ͷςετίʔυ͸౰ͨΓલͷ࣌୅
    w ͞Βʹఆܗ࡞ۀɺӡ༻ϛε΁ͷରࡦɺίʔυϨ ϏϡʔͷࢦఠͳͲɺςετίʔυʹམͱ͠ࠐΉ
    w ಉ͡஄ؙʹ౰ͨΒͳ͍Α͏ʹ͢Δ
    w 3VCP$PQͰ͸TQFDQSPKFDU@TQFDSCΛ༻ҙ͠ ͓ͯΓɺ࣮Ҋ݅ʹ΋ྲྀ༻Ͱ͖Δߟ͑ํ ϓϩδΣΫτΛςετ͢Δ
57. w ςετίʔυͱͦͷ࣮ߦ࣌ؒ͸ΞϓϦέʔ γϣϯͷ௥Ճͱͱ΋ʹྦྷੵ͞Εଓ͚Δ
    w ςετ࣮ߦ͸ͨͩͰ͸ͳ͘ɺςετ͕ॏ ͳ͍ͬͯ͘ͱෆ҆ఆͳςετɺεϩʔςε τͱ͍͏໰୊ͱ௚໘͍ͯ͘͠ ࣗಈςετͷ࣮ߦίετ
58. w ࠷଎ղܾ͸Ϛγϯࢿݯ΁ͷۚͷ஄ؙ
    ۚ
    w ߴ଎Խͷجຊ͸ฒྻԽͱݸผνϡʔχϯά
    w rspec -p
    --profile
    ͳͲͰϓϩϑΝ ΠϦϯάΛͱΓɺ஗͍ςετ͔ΒςίೖΕ
    ΦϦίϯνϟʔτతͳ εϩʔςετܐࣄ
    σΧ
59. w %#ͷΫϦʔχϯάઓུͰ෼͕෼ʹͳͬͨࣄ ͋Γ
    w %BUBCBTF$MFBOFSͰ͋Ε͹ DatabaseCleaner.strategyΛtruncation
    deletion
    truncationͲΕ͕࠷ద͔ܭଌ͢Δ
    w BNBUTVEBEBUBCBTF@SFXJOEFSΛݕ౼͢Δ %#ͷΫϦʔχϯάઓུ
60. w ྫ͑͹ඵ͔͔Δεϩʔςετ͕ݸ
    ͋ΔͱɺͦΕ͚ͩͰ෼͔͔Δ
    w ͭ·Γ௚ྻͩͱ೔Ͱͷ$*ͷ্ݶ͸ճҎ ԼʹͳΔ
    w ੒௕͢ΔγεςϜ͸ਓ͕૿͑ɺ13͕૿͑ͯ ͍͘ͷͰ$*αʔϏεͷ੔ཧ͸վΊͯॏཁ ೔͸ ඵ
61. ௥੻
62. w γεςϜ΁ͷมߋʹର͢Δ௥੻༰қੑ
    w γεςϜτϥϯβΫγϣϯͷ௥੻༰қੑ ຊઅͰऔΓѻ͏௥੻
63. w ໰୊ྖҬͷੈք؍ΛγεςϜʹ൓өͤ͞Δ
    w ྑ໊͍෇͚͸γεςϜղੳ
    ͋Δ͍͸Ϗδωε ͷٯղੳ
    ΁ͷ࠷ߴͷख͕͔Γ
    ຊ೔౓໨
    w ଧͪ߹ΘͤͰ఻͑ΒΕͨγεςϜ΁ͷมߋཁ ݅Λɺ͍͔ʹޮ཰తʹḷΔ͜ͱ͕Ͱ͖Δ͔ʁ FH
    ͦΕͬΆ͍༻ޠΛ
    HSFQ
    ͢Δ ໊લʹΑΔτϨʔαϏϦςΟ
64. w ҙຯͱͯ͠ॏෳ͍ͯͨ͠ίʔυͷҰ෦ͷର Ԡ࿙ΕʹΑΓΠϯγσϯτ͕ൃੜͨ͠਺Λ ͍֮͑ͯ·͔͢ʁ
    w ͻͱͭͷมߋཁٻʹରͯ͠ɺมߋՕॴ͕গ ͳ͚Ε͹গͳ͍΄ͲଛইᎭ࠲཰Λ཈͑ΒΕ Δ %POU
    3FQFBU
    :PVSTFMG
65. w ͱΓ͋͑ͣίϐϖͰ࡞͓͍ͬͯͯɺ͋ͱͰϦ ϑΝΫλϦϯά͢Ε͹ྑ͍ͩΖ͏
    👿
    w NBTUFS
    NBJO
    ʹϚʔδ͞ΕͨΒɺ
    ϝϯςφϯε͞Εͦ͏ʹͳ͍ͩΖ͏
    👼
    w ͍·͸ٸ͍Ͱ͍Δ͔ΒɺͤΊͯίϝϯτΛॻ ͖࢒ͯ͠ޙͰ෼͔ΔΑ͏ʹ͓ͯ͜͠͏
    👶 ఱ࢖ͱѱຐͷڱؒͷχϯήϯ
66. w ίʔυͰදݱͰ͖ͳ͍ϙΠϯτ͸ίϝϯτΛ࢒͢
    w ಛʹʮԿͷͨΊͷίʔυʯ͔هड़͕ඞཁͩͱײͨ͡ ΒιʔείʔυίϝϯτΛ੯͠·ͳ͍
    w Ϧʔμϒϧίʔυ͸શষͷ͏ͪষΛίϝϯτʹ අ΍͍ͯ͠Δ
    ॏཁ͞۩߹ʂ
    w 50%0΍'*9.&Λॻ͘ͱ
    bin/rails notes
    Ͱ΋ ݟ͔ͭΔ ιʔείʔυίϝϯτ
67. w ྫ֎ϋϯυϦϯά΍γεςϜڥքʹϩάΛ࢓ࠐ Ήͱ͍͏ͷ͸ϩΪϯάͷఆੴ
    w *%Λݩʹϩά͔Β%#ͷؔ࿈΍ϓϩάϥϜͷಈ͖ Λḷͬͯཉ͍͠৘ใ͕ݟ͔ͭΕ͹ྑ͍͚ΕͲ
    w ΄͍͠ϩά͸͍͍ͨͯϩά͞Ε͍ͯͳ͍໰୊
    CZ
    NJXB ໰͍߹Θͤௐࠪɺো֐ௐࠪ IUUQTUXJUUFSDPNNJXBTUBUVT
68. w ໰୊͕ى͖ͨ࣌ɺ·ͣ৘ใΛूΊΔϩάΛ࢓ ࠐΜΉ͜ͱ͔Βελʔτͱ͍͏͜ͱ΋͋Δ
    w ͦ΋ͦ΋໰୊͕ى͖ΔՕॴ͕෼͔͍ͬͯΕ ͹ɺ໰୊Λ༧ظͯ͠ରԠ͓͚ͯ͠Δ
    w ઃܭ
    ϦϑΝΫλϦϯά
    ͱಉ͘͡ɺϩΪϯά ʹ͍ͭͯ΋໰୊ʹԠͯ͡վળΛ͍͚ͯ͠Δ΋ͷ :"(/*
    %3:
    ౓໨ͷ๏ଇ
69. ධՁ
70. ඞཁͳ΋ͷ͔Βॱ൪ʹ IUUQTXXXNPVOUBJOHPBUTPGUXBSFDPNCMPHBSFPGGFBUVSFTSFBMMZSBSFMZPSOFWFSVTFE
71. wʷʮ଎͍ʯͱ͔ʮ͍҆ʯͱ͔ʜ
    w˓ʮܧଓʯతʹʮՁ஋ʯΛಧ͚Δ ΞδϟΠϧιϑτ΢ΣΞ։ൃ QJWPU QJWPU
    JGͷੈք QJWPU ܁Γฦ͞Εͨ બ୒͕൓ө͞ ΕͨγεςϜ
    ౰ͨΓ͚ͩ Ͱͳ͘ϋζϨ ΋ؚ·ΕΔ σʔλʹج͖ͮબ୒ͱҙࢥܾఆΛߦ͏
72. IUUQBHJMFFTNDPKQQJWPUBMUSBDLFSIFMQHFUUJOHTUBSUFE@KB ཉ͍͠ংྻ͸ೖΕସΘΔ
73. w ,(*Λୡ੒͢ΔͨΊͷ,1*޲্Λૂͬͨࢪࡦػ ೳͰ͋Ε͹ɺׂΓͱܭଌΛηοτͰߟ͑ΒΕΔ
    w ͏·͘ߦ͔ͳ͚Ε͹ࠩ͠໭͍͔ͨ͠΋͠Εͳ͍
    w ϞχλϦϯάج൫ʹର͢Δཁ݅༗ແΛ֬ೝͯ͠ ͓͘ͱྑ͍
    ݟੵΓ͕ඞཁͳͱ͖͸͓๨Εͳ͘ ʮ͜͏͍ͬͨػೳ͕ཉ͍͠ʯͷཪଆΛ஌Δ
74. w શ෦࡞ͬͯΈΑ͏΍ɺͱΓ͋͑ͣ࡞ͬͯΈ Α͏ͱ͍͏΋ͷ͸ɺٙͬͯΈΔͱྑ͍
    w ։ൃϦιʔε͸༗ݶͰ͋ΓɺՁ஋ͷߴ͍
    ػೳʹߜͬͨϝϯςφϯεΛ໨ࢦ͢
    w ػೳͷ଍͠ࢉ͚ͩͰ͸ͳ͘ɺͱ͖ʹ͸ෆཁ ͳػೳͷҾ͖ࢉΛߟ͑ͯΈΔ ࣮૷͕ͳ͚Ε͹੍໿͸ݮΔ
75. อ࣋
76. w ௕णαʔϏεʹͳΕ͹ͳΔ΄ͲϨίʔυྔ͸ӈݞ্ ͕ΓͰ૿Ճ͢Δ
    w Ϩίʔυͷ૿Ճʹ൐͍ɺεϩʔΫΤϦʹసͯ͡͠· ͏͜ͱ͕͋Δ
    w ඇ߃ٱอ͔࣋߃ٱอ͔࣋͸σʔλઃܭͷ伴ʹͳΔ
    w Ӭଓ͢΂͖σʔλ͔ɺফڈՄೳͳσʔλ͔ʁফڈ͢ ΂͖σʔλ͔ʁ
    ୀձऀσʔλͳͲ σʔλͷϥΠϑαΠΫϧ
77. w *OEFY
    4IPUHVOͰෆཁͳΠϯσοΫεΛ
    ݕग़ͯ͠࡟আ͢Δ
    ߋ৽ܥͷ଎౓վળʹܨ͕Δ
    
    FH
    HJUIVCDPNTVFJOEFY@TIPUHVO
    w "3
    TFTTJPO
    TUPSFΛ࢖͍ͬͯΔΑ͏ͳ৔߹ TFTTJPOTϨίʔυΛΫϦʔχϯά͠ͳ͍ͱΰϛ σʔλ͕݁ߏͳσΟεΫྔΛ઎Ί͍ͯΔ͔΋
    bin/rails db:sessions:trim
    Λ๨Εͣʹ σʔλΫϦʔχϯά
78. w ࡟আͰ͖Δσʔλ͕͋Ε͹ɺ࡟আ͢Δ͜ͱͰσʔλྔ
    ݕࡧ ྔ
    ΛݮΒ͢
    w ݕࡧର৅ͷ೔෇ΛߜΔ͜ͱͰɺݕࡧྔΛݮΒͤΔΑ͏Ͱ͋Ε ͹ɺཁ݅ௐ੔ΛࢼΈΔ
    w ཁ݅ʹΑͬͯϦΞϧλΠϜੑ͕ඞཁͳ͚Ε͹ɺूܭࡁΈͷ
    αϚϦʔςʔϒϧΛ༻ҙ͢Δ
    w ͦ΋ͦ΋ͷ42-ʹ໰୊͕͋Ε͹վળɺຊ࣭తʹ42-͕దͯ͠ ͍ͳͦ͞͏Ͱ͋Ε͹ɺ3%#Ҏ֎ͷΠϯϑϥཁ݅Λݕ౼͢Δ σʔλ૿ՃʹΑΔεϩʔΫΤϦ
79. w 3%#.4ʹର͢ΔධՁϞχλϦϯά͕ඞཁͳ৔߹ ͸ɺϦʔυϨϓϦΧΛ༻ҙ͓ͯ͘͠ͳͲݕ౼ͯ͠ ͓͘ͱྑ͍
    w ΦϯϥΠϯͰܨ͕͍ͬͯΔຊ൪σʔλʹॏ͍ूܭ 42-Λൃߦ͢ΔͱɺϢʔβʔӨڹͰ൵͍͜͠ͱʹ ͳΓ͔Ͷͳ͍
    w ਨ௚෼ׂʹͳΔͱ%#σʔλઃܭ͕ඞཁ
    ׂѪ ෳ਺σʔλϕʔε
    ϨϓϦΧηοτ
80. w ςʔϒϧϨίʔυෳ਺ͷσʔλϕʔεʹ෼ࢄ͢Δख๏
    w ςʔϒϧؒͷ
    JOIN
    ͕೉͘͠ͳΓɺσʔλΛϦϯΫ͢Δͨ ΊͷઃܭɺϝϯςφϯείετΛֻ͚Δ΄ͲͷεέʔϥϏ ϦςΟ֬อ͕ຊ౰ʹඞཁͳ΋ͷ͔Αۛ͘ຯͨ͠ํ͕ྑ͍
    w ʰෳ਺%#
    $BTVBM
    5BMLTʱͰΑ͘ฉ͍ͨ͜ͱ͸ʮෳ਺%#͢ Δͳʯͩͬͨɻ୯Ұ%#Ͱ͸࢖Θͳ͍೴ྗ͕ٻΊΒΕΔ
    w ηΩϡϦςΟ্ͷཧ༝Ͱ%#Λ෼͚ͳ͚Ε͹ͳΒͳ͍ͱ͍͏ ࿩͸େมͦ͏ͩͬͨ ෳ਺σʔλϕʔε
    γϟʔσΟϯά
81. w σʔλϕʔεઃܭ͸ɺ&3%ͷεΩʔϚઃܭ Ҏ֎ʹͲͷΑ͏ͳσʔλ͕ͲΕ͘Β͍૿෼ ͦ͠͏͔σʔλઃܭͱݟཱͯʹ͍ͭͯϓϥ χϯά͓ͯ͘͠ͱྑ͍
    w ϩʔΧϧͷগྔσʔλͱຊ൪؀ڥͰ૿෼͠ ͍ͯ͘σʔλͷҧ͍Λ಄ͷཪʹඳ͍͓ͯ͘ εΩʔϚઃܭॏཁɺσʔλઃܭ΋ॏཁ
82. ڞ૑
83. 3BJMT͸όʔδϣϯ্͕͕ ΔͱɺผͷϑϨʔϜϫʔΫ ʹͳͬͯେม पลͷਓʑ͕มΘΔΘ͚ Ͱ͸ͳ͍ͷͰਓ୳͔͠Β ΍Βͳͯ͘͢Ή !LPJD RVFTUJPOFS 3VCZ
    #VTJOFTT
    6TFST
    $POG
    ʹͯ
84. w 3BJMT͸୯ͳΔϑϨʔϜϫʔΫͱ͍͏͚ͩͰ ͸ͳ͘ɺͦΕΛத৺ͱͨ͠ίϛϡχςΟͰ ͋Δ
    w ن໿ʹଇ࣮ͬͨ૷Λ͢Δ͜ͱͰɺ৽͘͠ϓ ϩδΣΫτʹೖΔ࣌ɺܴ͑Δ࣌ɺϨʔϧͰ ܨ͕ͬͨͱײ͡ΒΕΔੈքʹ͚ۙͮΒΕΔ 3BJMTͱ͍͏ڞ௨ج൫
85. IUUQKQSVCZJTUOFU3VCZ,BJHJ DQMVHJOQMVHJOBUUBDI@EPXOMPBEQ1SPHSBNpMF@OBNFUIF@JTMBOE@PG@SVCZ@KQEG 3VCZ,BJHJ
     %BWF
    5IPNBT
86. l IUUQTXXXBUNBSLJUDPKQOFXTSBJMTIUNM There are few Japanese contributors of Rails in 2009 IUUQTUXJUUFSDPNZBIPOEBTUBUVT ˠ ೔ຊͷ3BJMT͸࢒೦ɻ೔ຊ Ͱ3BJMT͕࢖ΘΕͯͳ͍ͱ ͍͏͜ͱ͸ͳ͍ͱࢥ͏͕ɺ ͦΕʹͯ͠͸։ൃऀ͕গͳ ͍ɻࢲ͕ݟͨͱ͜Ζ ਓதͰ೔ຊਓΒ͖͠ਓ͸਺ ਓɻ
87. w ۙॴʹ͍Δਓͷ(FNΛ࢖͑ͷ๏ଇ
    w ࠔͬͨͱ͖։ൃऀʹ஍ҬίϛϡχςΟͳͲͰ௚ ઀࿩ͤΔ͔΋
    w ໰୊ΛΑΓ؅ཧ͠΍͘͢ͳΔ
    w ͲΜͳਓ͕࡞ͬͨ(FN͔
    ΫηͳͲ΋
    ෼͔Δ
    w 3BJMTपลͷਓ͕पΓʹ૿͑Δޮೳ 044͸ਓ͕࡞͍ͬͯΔ
88. 044ίϛϡχςΟͱͷڞੜΛࢧԉ
89. େ͖ͳࡿΛ޿͛Δ υΩϡϝϯτͷεϖϧϛεͷमਖ਼Λ࢝Ίͨྡͷ ਓ͕ɺ࣍ͷૉ੖Β͍͠ػೳΛ࣮૷͢Δ͜ͱʹͳ Δ͔Ͳ͏͔͸୭ʹ΋Θ͔Γ·ͤΜɻ͔͠͠ɺ͋ ͳ͕ͨඍসΜͰɺͲΜͳখ͞ͳߩݙʹ΋ײँΛ ࣔ͢͜ͱͰɺϞνϕʔγϣϯΛߴΊͤ͞ɺͦͷ Մೳੑ΋ੜ·ΕΔ͔΋͠Ε·ͤΜɻ 5IF
    3BJMT
    %PDUSJOF ೔ຊޠ༁ IUUQTRJJUBDPNUBLBIBTIJNJUFNTE⒎FFDCEBD&""&%&""&&&#"&&#QVTIVQBCJHUFOU
90. w ୭͔ʹͱͬͯ໾ʹཱͭͷ͸ίʔυͱ͸ݶΒ ͳ͍
    w ͳΜΒ͔ͷϥΠϒϥϦͷ૊Έ߹ΘͤͰ౿Μ ͩόάͷϨϙʔτ΍ɺϫʔΫΞϥ΢ϯυͷ ղܾࡦͰ΋هࣄΛॻ͍͓͚ͯ͹ɺಉ͡໰୊ ʹૺ۰ͨ͠ਓͷݕࡧώοτͰ໾ཱ͔ͭ΋ όουϊ΢ϋ΢ͷڞ༗
91. ୭͔ʹͱͬͯͷ໰୊͸
    ࣗ෼ʹͱͬͯͷ໰୊͔΋ ͠Εͣɺͦͷٯ΋વΓ զʑ͸ϨʔϧͰܨ͕͍ͬͯΔ
92. ײ৘
93. w ະિ༗ͷΤϯδχΞืू࣌୅
    w ϏδωεΛ੒ཱͤ͞ΔϓϩμΫτ͸ॏཁͩ ͕ɺϓϩμΫτΛϝϯςφϯεͰ͖Δ։ൃ ऀ͕͍ͳ͍ͱαʔϏεΛҡ࣋੒௕Ͱ͖ͳ͍
    w ָ͘͠ͳ͍ϨΨγʔٕज़͚ͩͩͱɺ޷ح৺ Ԣ੝ͳ։ൃऀͷؔ৺Λอͭͷ͸೉͍͠ ։ൃऀͷ৺ٕମͷόϥϯεऔΓ
94. w ʮΊΜͲ͏ͩͳʯͱ͍͏ײ৘ࣗମ͸ॏཁ
    w γεςϜͷ։ൃ͚ͩͰ͸ͳ͘ɺϓϩδΣΫτࣗମͷ ࣗಈԽΛ͢Δ
    w $*΍-JOUFSͱ͍͏πʔϧʹݶΒͣɺఆܕ࡞ۀʹͳΓ ͦ͏ͳ΋ͷ͸ɺΤϯδχΞϦϯάͰղܾͰ͖ͳ͍͔ ݕ౼ͯ͠ΈΔ
    w ࣌ʹ͸ଵଦʹͳΔͨΊʹ੯͠·ͳ͍ F9USFNF
    -B[JOFTT
95. w ϩʔϯνޙ೥Λܴ͑ΔαʔϏε͕͋Δ
    3BJMT
    
    
    3VCZ
    
    ͔
    3BJMT
    
    
    3VCZ
    
    ͷͲͪΒ͕γϡοͱ ϝϯςφϯε͞Εͯͯɺָͦ͠͏ʁ
    w OQN؅ཧ͞Ε͓ͯΒͣɺ&4Ҏ߱ͷߏจ͕࢖͑ͳ͍
    ϨΨγʔϑϩϯτΤϯυΞϓϦʹະདྷΛݟΕͦ͏ʁ
    w ҰํͰ໨ͷલͷ໰୊Λɺ஍ٿ্Ͱ࠷΋্खʹղܾͰ ͖Δͷ͸ࣗ෼ͨͪͰ͠ΐ͏
    खΛಈ͔͔͢Ͳ͏͔ 6QHSBEF
    NVTU
    HP
    PO
96. ϓϩμΫτͷϝϯςφϏϦ ςΟ޲্ͱɺΤϯδχΞͱ ͯ͠ಇ͘Α͏ʹͳ͔ͬͯΒ ͷϨϕϧΞοϓ͸ंͷ྆ྠ
97. w 3BJMTΞϓϦέʔγϣϯͷηΩϡϦςΟΞοϓ σʔτΛͰ͖Δঢ়ଶͮ͘Γ͸γεςϜͷ݈߁ Λҡ࣋͢ΔॏཁͳϑΝΫλʔ
    w ΞϓϦέʔγϣϯߏஙٕज़ͷϞμϯԽ͸ɺγ εςϜʹؔΘΔ։ൃऀͷΩϟϦΞͷ݈߁Λҡ ࣋͢ΔॏཁͳϑΝΫλʔ
    ৺ͷ݈߁ʹܨ͕Δ ϞμϯԽͷॏཁੑ
98. ࣗΒͷٕज़ʹؔ৺Λ࣋ͭ͜ͱ
    ͋ͳͨͷ࢓ࣄʹ͍ͭͯߟ͑Δ͜ͱʂ ܅͸ֶͿ͜ͱ͕৺͔Β޷͖ͩ
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