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Ruby on Rails講義 第18回, 第19回 Rails基礎
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Kuniaki IGARASHI
October 17, 2012
Technology
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7.5k
Ruby on Rails講義 第18回, 第19回 Rails基礎
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Kuniaki IGARASHI
October 17, 2012
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Transcript
3VCZPO3BJMTߨٛ ୈճ ୈճ3BJMTجૅ ,VOJBLJ*("3"4)*JHBJHB BUҰڮେֶ ࣾձՊֶʹ͓͚Δใٕज़ͱίϯςϯπ࡞*7 χϑςΟגࣜձࣾدෟߨٛ
χϑςΟגࣜձࣾ ఏڙ
ߨࢣ ޒेཛྷ໌ גࣜձࣾສ༿ɹΤϯδχΞ
࿈བྷ ݄ͷߨٛٳߨͰ͢ɻ
͓Έ͘͡ΞϓϦ IUUQXXXqJDLSDPNQIPUPTQPVDIJO
͓Έ͘͡ΞϓϦ༧Πϝʔδ
͓Έ͘͡ΞϓϦͭ͘Γ खॱ 3VCZͰ͓Έ͘͡ΫϥεΛ࡞Δ 3BJMTͰΞϓϦΛ࡞Δ ΞϓϦʹ͓Έ͘͡ΫϥεΛΈࠐΉ
͓Έ͘͡ΞϓϦͭ͘Γ खॱ 3VCZͰ͓Έ͘͡ΫϥεΛ࡞Δ 3BJMTͰΞϓϦΛ࡞Δ ΞϓϦʹ͓Έ͘͡ΫϥεΛΈࠐΉ
3VCZͰ͓Έ͘͡ΫϥεΛ࡞Δ ཁ݅ ˞ཁ݅ຬ͖ͨ݅͢
3VCZͰ࡞Δ͓Έ͘͡Ϋϥεཁ݅ ͓Έ͘͡ɺϥοΩʔΧϥʔɺ ϥοΩʔͳํ֯ΛऔಘՄೳɻ༰ҎԼɻ ͓Έ͘͡ େ٢٢த٢খ٢ڟ ϥοΩʔΧϥʔ ੨ԫ ϥοΩʔͳํ֯ ౦ೆ
3VCZͰ࡞Δ͓Έ͘͡Ϋϥεཁ݅ ͓Έ͘͡ϥϯμϜͰ݁Ռ͕มΘΔΑ͏ ʹ͍ͯͩ͘͠͞ɻ ຖճಉ݁͡ՌʹͳΒͳ͍Α͏ʹͯͩ͘͠͞ ͍ɻ
3VCZͰ࡞Δ͓Έ͘͡Ϋϥεཁ݅ JSCͰ࣍ͷΑ͏ʹ࣮ߦ͢Δͱɺ༰ͷೖ ͓ͬͨΈ͘͡ͷ݁Ռ͕ʮ͓Έ͘͡ΦϒδΣ Ϋτʯͱͯ͠औಘͰ͖ΔΑ͏ʹ͠·͢ɻ ͭ·ΓɺPNJLVKJSCΛ࡞ͬͯͦͷதʹ 0NJLVKJΫϥεΛ࣮͠·͢ɻ SFRVJSFPNJLVKJ PNJLVKJ0NJLVKJOFX
3VCZͰ࡞Δ͓Έ͘͡Ϋϥεཁ݅ ʮ͓Έ͘͡ΦϒδΣΫτʯ͔Β ࣍ͷΑ͏ʹͯ͠༰ΛࢀরͰ͖ΔΑ͏ʹ͠·͢ɻ PNJLVKJ0NJLVKJOFX PNJLVKJOBNFେ٢ PNJLVKJMVDLZ@DPMPS੨ PNJLVKJMVDLZ@EJSFDUJPOೆ
ԋशɿ3VCZͰ࡞Δ͓Έ͘͡Ϋϥε ώϯτ ཚΛಘΔʹSBOEΛ͍·͢ɻͨͱ͑ SBOE ʙͷͲΕ͔Λฦ͠·͢ɻ ΫϥεOFXͨ͠ͱ͖ʹɺJOJUJBMJ[Fϝιο υ͕ݺΕ·͢ɻ 3VCZͷจ๏ߨٛࢿྉୈճɺ·ͨʮͨͷ ͍͠3VCZʯɺωοτΛࢀরͯ͠Έ͍ͯͩ͘͞ɻ
IUUQTHJUIVCDPNIJUPUTVCBTIJSVCZMFDUVSF લड़ͷཁ݅Ͱ࣮͍ͯͩ͘͠͞ɻ
3VCZͰ࡞Δ͓Έ͘͡Ϋϥεಈ࡞֬ೝ ҎԼͷΑ͏ʹಈ͚0,Ͱ͢ɻJSCͰ࣮ߦͯ͠Έͯ ͍ͩ͘͞ɻ SFRVJSFPNJLVKJ PNJLVKJ0NJLVKJOFX PNJLVKJOBNFେ٢ PNJLVKJMVDLZ@DPMPS੨ PNJLVKJMVDLZ@EJSFDUJPOೆ JSC
ղྫΛ࣍ͷϖʔδʹॻ͍͍ͯ·͢ɻ
DPEJOHVUG DMBTT0NJLVKJ BUUS@SFBEFSOBNF MVDLZ@DPMPS MVDLZ@EJSFDUJPO EFGJOJUJBMJ[F !OBNF<େ٢ ٢ த٢ খ٢
ڟ><SBOE > !MVDLZ@DPMPS< ੨ ԫ ><SBOE > !MVDLZ@EJSFDUJPO<౦ ೆ ><SBOE > FOE FOE ԋशɿ3VCZͰ࡞Δ͓Έ͘͡Ϋϥε ղྫ PNJLVKJSC
DPEJOHVUG DMBTT0NJLVKJ BUUS@SFBEFSOBNF MVDLZ@DPMPS MVDLZ@EJSFDUJPO EFGJOJUJBMJ[F !OBNF<େ٢ ٢ த٢ খ٢
ڟ><SBOE > !MVDLZ@DPMPS< ੨ ԫ ><SBOE > !MVDLZ@EJSFDUJPO<౦ ೆ ><SBOE > FOE FOE ԋशղઆɿ3VCZͰ࡞Δ͓Έ͘͡Ϋϥε 0NJLVKJOFX͢ΔͱJOJUJBMJ[Fϝιου͕ݺΕɺ !OBNF !MVDLZ@DPMPS !MVDLZ@EJSFDUJPO͕࡞ ΒΕ·͢ɻ໊લ͕!͡·ΓͷมΠϯελϯεม Ͱ͢ɻ
DPEJOHVUG DMBTT0NJLVKJ BUUS@SFBEFSOBNF MVDLZ@DPMPS MVDLZ@EJSFDUJPO EFGJOJUJBMJ[F !OBNF<େ٢ ٢ த٢ খ٢
ڟ><SBOE > !MVDLZ@DPMPS< ੨ ԫ ><SBOE > !MVDLZ@EJSFDUJPO<౦ ೆ ><SBOE > FOE FOE ԋशղઆɿ3VCZͰ࡞Δ͓Έ͘͡Ϋϥε !OBNF<େ٢ ٢ த٢ খ٢ ڟ><SBOE > ͷSBOE dͷΛϥϯμϜʹฦ͠·͢ɻ<େ٢ ٢ த ٢ খ٢ ڟ>ྻͰ͢ɻྻ<Y>ͰY൪ͷཁૉΛऔΓग़ͤ· ͢ɻ͡·Γͳ͜ͱʹҙɻྫ͑<େ٢ ٢ த٢ খ ٢ ڟ><>த٢Ͱ͢ɻ
DPEJOHVUG DMBTT0NJLVKJ BUUS@SFBEFSOBNF MVDLZ@DPMPS MVDLZ@EJSFDUJPO EFGJOJUJBMJ[F !OBNF<େ٢ ٢ த٢ খ٢
ڟ><SBOE > !MVDLZ@DPMPS< ੨ ԫ ><SBOE > !MVDLZ@EJSFDUJPO<౦ ೆ ><SBOE > FOE FOE ԋशղઆɿ3VCZͰ࡞Δ͓Έ͘͡Ϋϥε BUUS@SFBEFSOBNF!OBNFΛฦ͢ϝιουΛ࡞Γ·͢ɻҎԼ ͱಉ͡Ͱ͢ɻ EFGOBNF !OBNF FOE
͓Έ͘͡ΞϓϦͭ͘Γ खॱ 3VCZͰ͓Έ͘͡ΫϥεΛ࡞Δ 3BJMTͰΞϓϦΛ࡞Δ ΞϓϦʹ͓Έ͘͡ΫϥεΛΈࠐΉ 3VCZͰಈ͓͘Έ͘͡Ϋϥε͕Ͱ͖·ͨ͠ɻʋ ˜A ϊ
͓Έ͘͡ΞϓϦͭ͘Γ खॱ 3VCZͰ͓Έ͘͡ΫϥεΛ࡞Δ 3BJMTͰΞϓϦΛ࡞Δ ΞϓϦʹ͓Έ͘͡ΫϥεΛΈࠐΉ ͭ͗3BJMTͰΞϓϦΛ࡞ͬͯΈ·͠ΐ͏ɻ ͔͜͜Βԋशʹ͠·͢ɻࣗͰࢿྉΛಡΈͳ͕Β ࡞ͬͯΈ͍ͯͩ͘͞ɻ
DEGPSUVOFT CVOEMFFYFDSBJMTHDPOUSPMMFSUPEBZJOEFY ͓Έ͘͡ΞϓϦͭ͘Γ 3BJMT3PPUҠಈͯ͠ϖʔδͷͻͳ͕ͨΛͭ͘Δ IUUQMPDBMIPTUUPEBZJOEFY ϒϥβ͔ΒҎԼͷ63-ʹΞΫηε͢Δ ࠓͷӡΛදࣔ͢ΔΞϓϦΛͭ͘Γ·͢ɻ CVOEMFFYFDSBJMTT SBJMTOFXGPSUVOFT 3BJMTΞϓϦΛͭ͘Δ
8FCαʔόΛىಈ͢Δ TTFSWFSͷུͰ͢ɻ˞ऴྃ$USM D PS$USM 1BVTF ͜Μͳը໘͕ग़·͢
͓Έ͘͡ΞϓϦͭ͘Γ खॱ 3VCZͰ͓Έ͘͡ΫϥεΛ࡞Δ 3BJMTͰΞϓϦΛ࡞Δ ΞϓϦʹ͓Έ͘͡ΫϥεΛΈࠐΉ ͦͯ͠ɺ͜͜·Ͱʹ࡞ͬͨͭΛΈ߹Θͤ·͢ɻ
ࠓͷӡΛදࣔͤ͞Δ PNJLVKJSCΛMJCͷԼʹίϐʔ͠·͢ɻ MJCPNJLVKJSC ͱ͍͏ϑΝΠϧ͕͋ΔΑ͏ʹஔ͢Ε0,Ͱ͢ɻ
IUUQMPDBMIPTUUPEBZJOEFY ࠓͷӡΛදࣔͤ͞Δ ͜Μͳը໘͕ग़Ε0,Ͱ͢ɻ I)FMMPJOEFYI Q'JOENFJOBQQWJFXTUPEBZJOEFYIUNMFSCQ BQQWJFXTUPEBZJOEFYIUNMFSC ͱͳ͍ͬͯΔͱ͜ΖΛҎԼͷΑ͏ʹमਖ਼͠·͢ɻ SFRVJSFMJCPNJLVKJSC !PNJLVKJ0NJLVKJOFX IࠓͷӡI
I!PNJLVKJOBNFI QϥοΩʔΧϥʔɿ!PNJLVKJMVDLZ@DPMPSQ QϥοΩʔͳํ֯ɿ!PNJLVKJMVDLZ@EJSFDUJPOQ ͖͞΄Ͳಉ༷ʹϒϥβͰҎԼΞΫηε ࣍ʹɺ
ղઆɿ7JFXʹ3VCZͷίʔυΛຒΊࠐΉ 7JFXʹ3VCZͷίʔυΛຒΊࠐΉͭͷύʔπ͕͋Γ·͢ɻ ͱͰ͢ɻ !PNJLVKJ0NJLVKJOFX Ͱғ·Εͨ3VCZͷίʔυΛ࣮ߦͯ͠ɺ݁ՌΛग़ྗ͠· ͢ɻද͍ࣔͨ͠ͱ͖ʹ͍·͢ɻ QϥοΩʔΧϥʔɿ!PNJLVKJMVDLZ@DPMPSQ ྫ ྫ
Ͱғ·Εͨ3VCZͷίʔυΛ࣮ߦ͠·͕͢ɺ݁ՌΛग़ྗ ͠·ͤΜɻॲཧ͚ͩΛߦ͏߹ʹ͍·͢ɻ ʹ
$POUSPMMFSॲཧΛҠಈ͢Δ 7JFXදࣔΛ͢ΔׂΛड͚࣋ͭ෦ͳͷͰɺදࣔ෦͚ͩΛͯ͠ ॲཧίϯτϩʔϥҠಈ͠·͢ɻ ҎԼͷϑΝΠϧΛมߋͯ͠ɺϒϥβ͔ΒΞΫηεͯ͠Έ͍ͯͩ͘͞ɻ BQQWJFXTUPEBZJOEFYIUNMFSC SFRVJSFMJCPNJLVKJSC DMBTT)FMMP$POUSPMMFS"QQMJDBUJPO$POUSPMMFS EFGJOEFY !PNJLVKJ0NJLVKJOFX FOE
FOE BQQDPOUSPMMFSTUPEBZ@DPOUSPMMFSSC ˞͜ͷΑ͏ʹʮ֎͔ΒݟͨৼΔ͍Λม͑ͣʹίʔυཧ͢Δʯ ͜ͱΛϦϑΝΫλϦϯάͱݴ͍·͢ɻ SFRVJSFMJCPNJLVKJSC !PNJLVKJ0NJLVKJOFX IࠓͷӡI I!PNJLVKJOBNFI QϥοΩʔΧϥʔɿ!PNJLVKJMVDLZ@DPMPSQ QϥοΩʔͳํ֯ɿ!PNJLVKJMVDLZ@EJSFDUJPOQ ͜ͷߦΛআ
Ͱ͢ʂ ͓͔ͭΕ͞·Ͱͨ͠
͘ऴΘͬͨਓ ɾ$PEFDBEFNZͷ3VCZฤΛͬͯΈΔ $PEFDBEFNZΦϯϥΠϯֶशαΠτͰ͢ɻ ࣮ࡍʹϒϥβ্Ͱ࣮ߦͯ͑͋͠ΘͤΛͰ͖Δͷ͕ศརɻ IUUQXXXDPEFDBEFNZDPNUSBDLTSVCZ ɾϛχπΫͷ3VCZೖฤΛͬͯΈΔ ϛχπΫΦϯϥΠϯֶशαΠτͰ͢ɻ ຊޠ આ໌͕ͱͯஸೡͰΘ͔Γ͍͢Ͱ͢ɻ IUUQXXXNJOJUVLVOFU
‑จ ͜͜ʹίʔυΛॻ͘ Ͱ͖ͨΒ3VO ݁Ռ͕දࣔ͞ΕΔ $PEFDBEFNZ
None
ߨٛࢿྉஔ͖ ߨٛࢿྉஔ͖Λͭ͘Γ·ͨ͠ɻ աڈͷࢿྉ͕%-Ͱ͖·͢ɻ IUUQTHJUIVCDPNIJUPUTVCBTIJSVCZMFDUVSF PS IUUQCJUMZSVCZMFDUVSF
ࡶஊɾ࣭༻GBDFCPPLάϧʔϓ GBDFCPPLάϧʔϓΛ࡞Γ·ͨ͠ IUUQTXXXGBDFCPPLDPNHSPVQTIJUPUTVCBTIJSC ɾՃೖඇՃೖࣗ༝Ͱ͢ ɾՃೖඇՃೖʹؔ͠·ͤΜ ɾࢀՃऀҰཡެ։͞Ε·͢ ɾॻ͖ࠐΈࢀՃऀͷΈݟ͑·͢ ɾرऀΞΫηεͯ͠ࢀՃਃ͍ͯͩ͘͠͞ ɾࡶஊɺ࣭ɺٞͳͲԿͰؾʹͤͣͲ͏ͧʙ ɾ࣭ʹ͑ΒΕΔਓ͍͑ͯ͋͛ͯͩ͘͞
ɾߨࢣਞ͓͑͠·͢ ɾೖͬͨΒܰࣗ͘ݾհ͓Ͷ͕͍͠·͢