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`rails db:migrate`を使わない スキーマ変更を経験して学んだこと
shinji.uyama
February 27, 2019
Programming
1
330
`rails db:migrate`を使わない スキーマ変更を経験して学んだこと
2019/02/27 Meguro.rb#24 at ドリコム
shinji.uyama
February 27, 2019
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Transcript
ASBJMTECNJHSBUFAΛΘͳ͍ εΩʔϚมߋΛܦݧֶͯ͠Μͩ͜ͱ .FHVSPSCBUυϦίϜ TIJOKJVZBNB
Ӊࢁ৻ೋ6ZBNB4IJOKJ 'SPOUFOE4FSWFSTJEF&OHJOFFS TIJOKJVZBNB !V@TIJOKJ ΞσΟογϡגࣜձࣾ
ࠓ͢Δ͜ͱ w ͳͥASBJMTECNJHSBUFAΛΘͳ͍εΩʔϚมߋΛͨ͠ʁ w ͦͷࡍʹֶΜͩ͜ͱ
ͳͥASBJMTECNJHSBUFAΛΘͳ͍ εΩʔϚมߋΛߦͬͨͷ͔ʁ
ࣄͷൃ ֎෦੍ΩʔͷมߋΛ͔ͨͬͨ͠
ࣄͷൃ ˢ࣮ߦ͞ΕΔ42-จ ֎෦੍ΩʔͷมߋΛ͔ͨͬͨ͠
ͦͷ݁Ռʜ
ςʔϒϧϩοΫ͕ൃੜ
֎෦੍ΩʔՃ௨ৗςʔϒϧϩοΫ͞ΕΔ IUUQTEFWNZTRMDPNEPDSFGNBOKBJOOPECDSFBUFJOEFYPWFSWJFXIUNM ࢀর .Z42-ϦϑΝϨϯεɿΦϯϥΠϯ%%-
ςʔϒϧϩοΫͤ͞ͳ͍Α͏ʹ͢ΔͨΊʹ ASBJMTECNJHSBUFAΛΘͳ͍εΩʔϚมߋ͔ΒֶΜͩ͜ͱ
ֶͼ w ATDIFNB@NJHSBUJPOTAςʔϒϧͷׂ w ASBJMTECNJHSBUFAͰ࡞ΒΕΔΠϯσοΫεͷ໊લ
ςʔϒϧϩοΫ͞ΕΔͷରԠʁ
ରԠࡦ ઐ༻ͷϚΠάϨʔγϣϯπʔϧΛ͏͜ͱͰ ςʔϒϧϩοΫΛ͠ͳ͍ঢ়ଶͰεΩʔϚมߋ
ରԠϑϩʔ #VJME %#.JHSBUJPO %FQMPZNFOU ಛผରԠ࣌ͷσϓϩΠϑϩʔ πʔϧΛͬͨ %#.JHSBUJPO 3BJMTͷ%#.JHSBUJPOΛεΩοϓ ࣗಈσϓϩΠ खಈରԠ
ಛఆͷ%#.JHSBUJPOΛͲ͏ͬͯεΩοϓ͢Δͷʁ
ATDIFNB@NJHSBUJPOTAςʔϒϧ %#.JHSBUJPOͷཧΛߦ͏ςʔϒϧ
ATDIFNB@NJHSBUJPOTAςʔϒϧ %#.JHSBUJPOͷཧΛߦ͏ςʔϒϧ ಛఆͷ%#ϚΠάϨʔγϣϯΛεΩοϓ͚ͨ͠Εɺ ࢦఆͷϑΝΠϧࣝผࢠΛࣄલʹςʔϒϧʹΠϯαʔτ͢ΕΑ͍ʂ
πʔϧʹΑΔ%#.JHSBUJPOͰɺଞʹ֬ೝ͖͢͜ͱ͋Δʁ
πʔϧΛ͏ࡍͷ֬ೝࣄ߲ πʔϧʹΑΔ%#.JHSBUJPO 3BJMTʹΑΔ%#.JHSBUJPO ̎ͭͷํ๏ͷ݁ՌͷؒͰ ςʔϒϧߏͷҧ͍͕ͳ͍Α͏ʹ͍ͨ͠
Կߟ͑ͣʹͬͯΈΔ ֎෦੍ͷՃ
̎ͭͷํ๏ͷؒͰ͕ࠩੜ·Δ w 3BJMTͷ%#.JHSBUJPOͷ߹ɺݻ༗ͷΠϯσοΫε໊ͷࢦఆΛߦͳͬ ͍ͯΔ w 3BJMTͷ%#.JHSBUJPO࣌ͷ໋໊ͱҟͳΔ߹ɺTDIFNBSCʹΠϯ σοΫε໊͕දࣔ͞ΕΔ TDIFNBSCͷࠩ
ΠϯσοΫε໊ͷࢦఆඞཁ
·ͱΊ w ಛఆͷ%#.JHSBUJPOͷεΩοϓ͍ͨ͠߹ɺ ATDIFNB@NJHSBUJPOTAςʔϒϧཱ͕ͭ w ASBJMTECNJHSBUFAҎ֎ͷํ๏ͰΠϯσοΫε࡞Λ͢Δ߹ɺ దͳΠϯσοΫε໊Λࢦఆ͢Δ͜ͱ w A"-5&35"#-&A͢ΔࡍɺςʔϒϧϩοΫʹؾΛ͚ͭͯʜ
͝੩ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠