現場Rails活用ガイド-読んで書いて終わりじゃない！-/genba_rails_guide

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%*7&*/50$0%&  ʮݱ৔Ͱ࢖͑Δ3VCZPO3BJMT଎श࣮ફΨΠυʯ૿࡮ه೦ஶऀަྲྀձ !UBUTVPTBLVSBJ ݱ৔3BJMT ݱ৔3BJMT  ׆༻ΨΠυ ᴷಡΜͰॻ͍ͯऴΘΓ͡Όͳ͍ʂᴷ

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ࣗݾ঺հ ᓎҪୡੜ!UBUTVP4BLVSBJ ສ༿3BJMTΤϯδχΞྺ೥ ສ༿औక໾ <ݱ৔Ͱ࢖͑Δ3VCZPO3BJMT଎श࣮ફΨΠυ> ͷஶऀͷҰਓ ϖΞϓϩ͕޷͖   ࠷ۙ%*$͞ΜͰ΋ϖΞϓϩͤͯ͞΋Β͍ͬͯ·͢ %*$ଔۀੜ!VDIJOPLPUͱͷϖΞϓϩࢿྉ  <ݱ৔Ͱ࢖͑ΔΏΔ͍ϖΞϓϩ>  IUUQTTQFBLFSEFDLDPNUBUTVPTBLVSBJMJHIUQFBSQSPHSBNNJOH

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ΞδΣϯμ ݱ৔3BJMTʹ͍ͭͯ ݱ৔3BJMTͷഎܠ ݱ৔3BJMTΛಡΜͩޙʹ

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ݱ৔3BJMT ݱ৔Ͱ࢖͑Δ3VCZPO3BJMT଎श࣮ફΨΠυ

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ݱ৔3BJMT ݱ৔Ͱ࢖͑Δ3VCZPO3BJMT଎श࣮ફΨΠυ ͓͔͛͞·Ͱ૿࡮ʂ ࡮Λॕͯ͠ϚΠφϏϒοΫε͞ΜͰ  ಛయ1%'ͷҰ෦Λެ։ IUUQTCPPLNZOBWJKQQDCPPLCMPHEFUBJMJE

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ࠓ೔དྷͯΔஶऀ େ৔ೡࢠ দຊ୓໵ খࣳඒ༝ل ᓎҪୡੜ

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ݱ৔3BJMT͕ॻ͔ΕͨܦҢ ϚΠφϏग़൛ͷҏࠤ͞Μ͔Βϝʔϧ ʢ ೥݄ʣ 3BJMTΛֶͼ͍ͨਓ͕૿͖͑ͯͯΔ Θ͔Γ΍͘͢ஸೡͳຊ͕ཉ͍͠ དྷ೥य़͘Β͍ʹग़൛Ͱ͖Ε͹ʜ

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https://everyleaf.com/ ݱ৔3BJMTͷഎܠ

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ݱ৔3BJMTͷഎܠ גࣜձࣾສ༿3BJMTϓϩϑΣογϣφϧ ͍ΖΜͳݱ৔ͷ͓ख఻͍Λͯ͠೥Ҏ্ 3VCZ΍3BJMT΍։ൃνʔϜͰֶΜͩจԽ ͳΔ΂͘Θ͔Γ΍͘͢఻͍͖͍͑ͯͨ

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ݱ৔3BJMTͷഎܠ 3BJMTͷຊ͸ͨ͘͞Μ͋Δ ࠓ·Ͱ͋·Γॻ͔Ε͍ͯͳ͍  ։ൃݱ৔ͷ࿩Λॻ͖͍ͨ ͦͯ͠ݱ৔Ͱ࢖͍͍ͨʂ

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ࣥච༻TMBDLνϟϯωϧ։ઃ ϚΠφϏग़൛͞Μͱॳ.5( ʜࣥචظؒ໿೥ʜ ਖ਼ࣜʹߍྃ ߪೖಛయߍྃ ൃച ॏ൛ܾఆ ୈ࡮ൃߦ ݱ৔3BJMTλΠϜϥΠϯ

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͔͜͜Β  ͋ͳͨͷϨʔϧΛ  ৳͹ͯ͠΋Β͑Δ  ͖͔͚ͬͱͳΕͨΒ  ͏Ε͍͠Ͱ͢ ݱ৔3BJMT  3BJMTΛ࢖ͬͨ8FCΞϓϦέʔγϣϯ։ൃͷ࠷ॳͷϨʔϧ

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ݱ৔3BJMTΛಡΜͩޙʹ 3BJMTΛֶͼ࢝Ίͨํ͔ΒΑ͘ड͚Δ࣭໰ l3BJMTҎ֎ʹͳʹΛ ֶͿͱ͍͍Ͱ͔͢ʁz

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ઙ͘޿͘͸ඇޮ཰ ʜͳʹΛ͍͔ͨ͠ɺͲ͏ͳΓ͍͔ͨʹ΋ΑΓ·͕͢ʜ 3VCZ΍3BJMTΛͪΌΜͱ࢖ ͑ΔΑ͏ʹͳ͔ͬͯΒͷํ͕ ଞͷݴޠΛֶͿͱ͖΋ޮ཰త

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3BJMT͕࢖͑Δͱ͸ʁ $36%͕Ͱ͖ͨʁ ΞϓϦ͕࡞Εͨʁ ΧϦΩϡϥϜ͕ऴΘͬͨʁ

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$36%͕Ͱ͖ͨʁ ΞϓϦ͕࡞Εͨʁ ΧϦΩϡϥϜ͕ऴΘͬͨʁ 3BJMT͕࢖͑Δͱ͸ʁ

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ݱ࣮ͷ໰୊Λղܾ͢Δ ຊ΍ϦϑΝϨϯε͚ͩͰ͸ݱ࣮ͷ໰୊͸ղܾͰ͖ͳ͍ʂ جຊΛ૊Έ߹ΘͤͨΓɺԠ༻ͨ͠Γʜ

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3BJMTͰݱ࣮ͷ໰୊Λղܾ ࡞Γ͍ͨ΋ͷɺղܾ͍ͨ͠՝୊Λߟ͑Δ ઃܭ͢Δ ࣮૷͢Δ ӡ༻͢Δ վળ͢Δ

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͙͢ʹ͸্ख͘Ͱ͖ͳ͍ ΍Δͱ׳ΕΔ ஌Βͳ͍ˠ஌ͬͯΔ ஌ͬͯΔˠΘ͔Δ Θ͔Δˠ࣮ફͰ͖Δ ܇࿅͕ॏཁʂ

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3BJMTΛखʹೃછ·ͤΔ ཪଆɾ࢓૊ΈΛ஌Δ 3VCZ 3BJMT HFN 8FC )551 )5.- %# 001 3&45 FUD ߟ͑ΔɺखΛಈ͔͢ ͦΕΒΛͨͷ͠Ή

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͍͢͝ਓୡ͔ΒڭΘͬͨ͜ͱ ͍͢͝ਓୡ͸ɺ  ͨ͘͘͢͝͞ΜͷίʔυΛಡΜͰ͍Δ ͨ͘͘͢͝͞ΜͷίʔυΛॻ͍͍ͯΔ ͨ͘͘͢͝͞ΜͷࣦഊΛ͍ͯ͠Δ ͨ͘͘͢͝͞ΜͷࠔΔ৔໘Λܦݧ͍ͯ͠Δ ͨ͘͘͢͝͞Μͷ޻෉ΛੵΈॏͶ͍ͯΔ

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͍͢͝ਓୡ͔ΒڭΘͬͨ͜ͱ ΋ͬͱ  ΍Γ͗ͯ͢  ͍͍Μͩʂ

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΋ͬͱʂ ΋ͬͱίʔυΛಡΉ ΋ͬͱίʔυΛॻ͘ ΋ͬͱͨ͘͞Μࣦഊ͢Δ ΋ͬͱࠔΔ৔໘Λܦݧ͢Δ ΋ͬͱͨ͘͞Μ޻෉Λ͢Δ

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΋ͬͱʂ ΋ͬͱಡΈ΍͍͢ίʔυʁ ΋ͬͱ଎͍ίʔυʁ ΋ͬͱૣ͘࡞Δʹ͸ʁ ΋ͬͱͨͷ͘͠։ൃ͢Δʹ͸ʁ ΋ͬͱ͍͍΋ͷΛ࡞Δʹ͸ʁ

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%*7& */50 $0%& ΋ͬͱʂ

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ίʔυʹજΔίπ ʓ4QFDJBMɹ5JQT ɹɾCZFCVHͰσόοά ɹɾ#VOEMFSͰHFNͷத਎Λௐ΂Δ ɹɾ.FUIPETPVSDF@MPDBUJPOͰϝιουͷ࣮૷ՕॴΛ୳͢ ɹɾ"DUJWF3FDPSE3FMBUJPOUP@TRMͰ42-Λ֬ೝ͠Α͏ ʓ4QFDJBMɹ͓໾ཱͪϦϯΫू ɹɾ3VCZͷϦϯΫू ɹɾ3BJMTͷϦϯΫू ɹɾHFNͷϦϯΫू ɹɾ34QFDͷϦϯΫू

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ݱ৔3BJMT ݱ৔Ͱ࢖͑Δ3VCZPO3BJMT଎श࣮ફΨΠυ ͓͔͛͞·Ͱ૿࡮ʂ ࡮Λॕͯ͠ϚΠφϏϒοΫε͞ΜͰ  ಛయ1%'ͷҰ෦Λެ։ IUUQTCPPLNZOBWJKQQDCPPLCMPHEFUBJMJE

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ͱΓ͋͑ͣͲΜͳ͜ͱ͔Βʁ Α͘࢖͏΋ͷ͸֮͑Δ ศརͳಓ۩Λ஌Δ ࢖͏ස౓ͷߴ͍΋ͷ͸ɺεοͱ࢖͑ΔΑ͏ʹͯ͠ ͓͘ͱ࢖͏ճ਺෼͓ಘ ύλʔϯΛ஌ͬͯ࢖͑ΔΑ͏ʹ͓ͯ͘͠ͱޮ཰త جૅΛ͔ͬ͠ΓݻΊΔʢԠ༻͸جૅͷ্ʣ

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جૅΛݻΊΔɾ۷ΓԼ͛Δ ຊͷ௨Γʹॻ͍ͯΈͯಈ͍ͨ ͪΐͬͱม͑ͯΈΔͱͲ͏ͳΔʁ ༧૝Ͳ͓ΓʁҧͬͨʁͳΜͰͩΖ͏ʁʁʁ 3BJMTͷϝιου͸ͲΜͳ࣮૷ʹͳͬͯΔʁ ຊ΍ϦϑΝϨϯεʹॻ͍ͯ͋Δ͔Βಈ͘Θ͚͡Όͳ͍ɻ࣮૷͞Εͨ௨Γʹಈ͘  3BJMT͸3VCZͰॻ͔Ε͍ͯΔͷͰɺ3VCZ͕Θ͔Δͱ3BJMTͷίʔυ͕ԿΛ͍ͯ͠Δͷ͔Θ͔ͬͯศརʂ

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ཪଆʹࢥ͍Λ஘ͤΔ ॻ͍ͯಈ͍ͨʂ··ʹ͍ͯ͠·ͤΜ͔ʁ  ࣗ෼͕ॻ͍͍ͯΔίʔυɺ3BJMT͕ཪͰͳʹΛͯ͠ ͘ΕͯΔ͔Θ͔Γ·͢ʁ ͲΜͳΫϥε͕࢖ΘΕͯΔ͔ҙࣝͰ͖ͯ·͢ʁ

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ݱ৔3BJMTͷ׆༻ ຊʹॻ͍ͯ͋Δ͜ͱΛ͖͔͚ͬʹ ޷͖ͳͱ͜ΖɺؾʹͳΔͱ͜ΖΛ۷ΓԼ͍͛ͯ͘ ͲΜͳΫϥεͷϝιουʁ ΫϥεϝιουʁΠϯελϯεϝιουʁ ۤखͳͱ͜Ζ͸ʁΑ͘࢖͏ͱ͜Ζ͸ʁԠ༻Ͱ͖Δʁ

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ݱ৔3BJMTͷ׆༻ ݱ৔3BJMTʹॻ͍ͯ͋Δ͜ͱΛͨΊ͢ ॻ͍ͯ͋Δ͜ͱΛͪΐͬͱม͑ͯಈ͔ͯ͠ΈΔ ཪଆͰͲΜͳ͜ͱ͕ى͖ͯΔ͔ௐ΂Δ 3BJMTͷ࣮૷ΛΈΔ ݱ৔3BJMTΛಡΈฦ͢

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ݱ৔3BJMTͷಛయͷ׆༻ 3BJMTͷ࣮૷ΛΈͨΓɺཪଆͰͳʹ͕ىͬͯ͜Δ͔ௐ΂Δͷʹศར  ɹɾCZFCVHͰσόοά ɹɾ#VOEMFSͰHFNͷத਎Λௐ΂Δ ɹɾ.FUIPETPVSDF@MPDBUJPOͰϝιουͷ࣮૷ՕॴΛ୳͢ ɹɾ"DUJWF3FDPSE3FMBUJPOUP@TRMͰ42-Λ֬ೝ͠Α͏

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ਖ਼ղͷͳ͍ੈք ϓϩάϥϛϯάʹਖ਼ղ͸͋Γ·ͤΜ ਖ਼ղ͕͋ͬͯͦ͜ʹ޲͔͏ͱ͍͏΋ͷͰ͸ͳ͘ ࣗ෼ୡͰਖ਼ղΛ࡞Γग़͍ͯ͘͠ϓϩηε

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͔͜͜Β  ͋ͳͨͷϨʔϧΛ  ৳͹ͯ͠΋Β͑Δ  ͖͔͚ͬͱͳΕͨΒ  ͏Ε͍͠Ͱ͢ ݱ৔3BJMT  3BJMTΛ࢖ͬͨ8FCΞϓϦέʔγϣϯ։ൃͷ࠷ॳͷϨʔϧ

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·ͱΊ

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ࣥච༻TMBDLνϟϯωϧ։ઃ ϚΠφϏग़൛͞Μͱॳ.5( ʜࣥචظؒ໿೥ʜ ਖ਼ࣜʹߍྃ ߪೖಛయߍྃ ൃച ॏ൛ܾఆ ୈ࡮ൃߦ ݱ৔3BJMTλΠϜϥΠϯ

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ݱ৔3BJMT ݱ৔Ͱ࢖͑Δ3VCZPO3BJMT଎श࣮ફΨΠυ ͓͔͛͞·Ͱ૿࡮ʂ ࡮Λॕͯ͠ϚΠφϏϒοΫε͞ΜͰ  ಛయ1%'ͷҰ෦Λެ։ IUUQTCPPLNZOBWJKQQDCPPLCMPHEFUBJMJE

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͔͜͜Β  ͋ͳͨͷϨʔϧΛ  ৳͹ͯ͠΋Β͑Δ  ͖͔͚ͬͱͳΕͨΒ  ͏Ε͍͠Ͱ͢ ݱ৔3BJMT  3BJMTΛ࢖ͬͨ8FCΞϓϦέʔγϣϯ։ൃͷ࠷ॳͷϨʔϧ

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ࠓ೔དྷͯΔஶऀ େ৔ೡࢠ দຊ୓໵ খࣳඒ༝ل ᓎҪୡੜ

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େ৔ೡࢠ দຊ୓໵ খࣳඒ༝ل ᓎҪୡੜ ͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠ʂ  ଓ͖͸ަྲྀձͰʂ