Rails講義第25回 model

3VCZPO3BJMTߨٛ ୈճNPEFM ,VOJBLJ*("3"4)*JHBJHB BUҰڮେֶ ࣾձՊֶʹ͓͚Δ৘ใٕज़ͱίϯςϯπ࡞੒*7 χϑςΟגࣜձࣾدෟߨٛ

χϑςΟגࣜձࣾ ఏڙ

ߨࢣ ޒेཛྷ๜໌ גࣜձࣾສ༿ɹΤϯδχΞ

TDBGGPMEͰ࡞ͬͨɺຊͷλΠτϧͱϝϞΛ؅ཧͰ͖Δ ΞϓϦΛ୊ࡐʹઆ໌͠·͢ɻ SBJMTOFXCPPLT@BQQ લ४උ DECPPLT@BQQ CVOEMFFYFDSBJMTHTDBGGPMECPPLT UJUMFTUSJOHNFNPUFYU CVOEMFFYFDSBLFECNJHSBUF IUUQMPDBMIPTUCPPLT CVOEMFFYFDSBJMTT
ϒϥ΢βͰ্هͷΞυϨε΁ΞΫηε

ࠓ೔͸σʔλΛ௕ظอଘ͢Δ ํ๏ʹ͍͓ͭͯ࿩͠·͢ɻ

ϓϩάϥϜதͰม਺ʹೖΕͨσʔλ ͸ɺม਺ͷ༗ޮൣғʢण໋Ͱ͢Ͷʣ ͕ऴΘΔͱফ͑ͯ͠·͍·͢ɻ ϩʔΧϧม਺͸ͦͷϝιου಺͕༗ޮൣғͰ͢ɻ Πϯελϯεม਺͸Πϯελϯε͕ͳ͘ͳ ΔͱҰॹʹফ͑·͢ɻ3BJMTͷ৔߹͸ɺ ͭͷϦΫΤετ಺͕༗ޮൣғͰ͢ɻ EFGGPP Y)FMMPXPSME FOE
!CPPLͷΑ͏ʹΠϯελϯεม਺ʹೖΕΔͱ$POUSPMMFS͔ Β7JFX·Ͱ࢖͏͜ͱ͕Ͱ͖·͕͢ɺͦͷޙͳ͘ͳΓ·͢ɻ

Ͱ΋ɺͭͬͨ͘3BJMTΞϓϦ͸ ผͷϦΫΤετͰ΋৘ใ͕ݟΕ·͢ΑͶʁ ࣗ෼Ͱೖྗͨ͠σʔλ͕ϒϥ΢β͔ΒԿճΞΫηεͯ͠΋දࣔ ͞Ε·͢ɻ ˞ϒϥ΢βͰճͷද͕ࣔճͷϦΫΤετͰ͢ɻ

Ͱ΋ɺͭͬͨ͘3BJMTΞϓϦ͸ ผͷϦΫΤετͰ΋৘ใ͕ݟΕ·͢ΑͶʁ σʔλ͕ͣͬͱ࢒͍ͬͯΔͷ͸ʮσʔλΛอଘ͢Δʯ࢓ࣄΛ͠ ͍ͯΔʮԿ͔ͷ࢓૊Έʯ͕͋Δ͔ΒͳͷͰ͢ɻ ͦͷ࢓૊Έ͕ࠓ೔ͷओ໾ .PEFM Ϟσϧ Ͱ͢ɻ

JOEFY CPPLT (&5 OFX CPPLTOFX (&5 FEJU CPPLTJEFEJU (&5 TIPX
(&5 CPPLTJE DSFBUF 1045 CPPLT VQEBUF CPPLTJE EFTUSPZ %&-&5& CPPLTJE ৽نొ࿥ SFEJSFDU SFEJSFDU ߋ৽ ฤू SFEJSFDU ৽نೖྗ ࡟আ ΞΫγϣϯ໊ )551ϝιου VSM ΞΫγϣϯ໊ )551ϝιου VSM ͜ͷਤ ͷݟํ ը໘͋Γ ը໘ͳ͠ $36%ը໘ભҠਤ 165 ίί‎ Ϟσϧ͸ͨͱ͑͹͜͜ʹ͍·͢ɻ

BQQDPOUSPMMFSTCPPLT@DPOUSPMMFSSC EFGDSFBUF !CPPL#PPLOFX QBSBNT<CPPL> SFTQPOE@UPEPcGPSNBUc JG!CPPLTBWF GPSNBUIUNM\SFEJSFDU@UP!CPPL OPUJDF#PPLXBTTVDDFTTGVMMZDSFBUFE^ GPSNBUKTPO\SFOEFSKTPO!CPPL TUBUVTDSFBUFE
MPDBUJPO!CPPL^ FMTF GPSNBUIUNM\SFOEFSBDUJPOOFX^ GPSNBUKTPO\SFOEFSKTPO!CPPLFSSPST TUBUVTVOQSPDFTTBCMF@FOUJUZ^ FOE FOE FOE ϦΫΤετ 63-IUUQMPDBMIPTUCPPLT )551ϝιουɿ1045 ύϥϝʔλ 'PSNEBUB ɿ CPPL<UJUMF>େ౦ژτΠϘοΫε CPPL<NFNP>ήʔϜ։ൃձࣾΛ෣୆ʹͨ͠೤݂ετʔϦʔ ϦΫΤετͷύϥϝʔλΛ࢖ͬͯ ຊͷσʔλΛ࡞Δ ຊͷσʔλΛอଘ͢Δ B੒ޭͨ͠ΒTIPXը໘΁ Cอଘࣦഊͨ͠ΒOFXը໘΁ ͖ͬ͞ͷը໘ #PPLT$POUSPMMFSͷDSFBUFΞΫγϣϯ

BQQDPOUSPMMFSTCPPLT@DPOUSPMMFSSC EFGDSFBUF !CPPL#PPLOFX QBSBNT<CPPL> SFTQPOE@UPEPcGPSNBUc JG!CPPLTBWF GPSNBUIUNM\SFEJSFDU@UP!CPPL OPUJDF#PPLXBTTVDDFTTGVMMZDSFBUFE^ GPSNBUKTPO\SFOEFSKTPO!CPPL TUBUVTDSFBUFE
MPDBUJPO!CPPL^ FMTF GPSNBUIUNM\SFOEFSBDUJPOOFX^ GPSNBUKTPO\SFOEFSKTPO!CPPLFSSPST TUBUVTVOQSPDFTTBCMF@FOUJUZ^ FOE FOE FOE ϦΫΤετ 63-IUUQMPDBMIPTUCPPLT )551ϝιουɿ1045 ύϥϝʔλ 'PSNEBUB ɿ CPPL<UJUMF>େ౦ژτΠϘοΫε CPPL<NFNP>ήʔϜ։ൃձࣾΛ෣୆ʹͨ͠೤݂ετʔϦʔ ϦΫΤετͷύϥϝʔλΛ࢖ͬͯ ຊͷσʔλΛ࡞Δ ຊͷσʔλΛอଘ͢Δ B੒ޭͨ͠ΒTIPXը໘΁ Cอଘࣦഊͨ͠ΒOFXը໘΁ ͖ͬ͞ͷը໘ #PPL.PEFM͕อଘͷ࢓ࣄΛ͍ͯ͠·ͨ͠ɻ ‐#PPLΫϥε͸.PEFMͱ͍͏छ଒ʹଐ͍ͯ͠·͢ɻ ‐͜͜Ͱอଘ͍ͯ͠·͢ɻ

Ͱ͸ɺϞσϧͷ࢓ࣄʹ͍ͭͯ ݟ͍͖ͯ·͠ΐ͏ɻ

CPPL#PPLOFX UJUMFϋνϛπͱΫϩʔόʔ NFNPඒେΛ෣୆ʹͨ͠੨य़ϥϒίϝ جຊతͳϞσϧͷ࢖͍ํอଘฤ #PPLOFXͰ#PPL.PEFMΦϒδΣΫτΛ࡞Γ·͢ɻ ͜ͷͱ͖ɺλΠτϧͱϝϞͷ৘ใΛ౉͢͜ͱ͕Ͱ͖·͢ɻ CPPLTBWF #PPL.PEFMΦϒδΣΫτͷTBWFϝιουΛݺͿͱอଘͰ͖·͢ɻ ҎԼͷͭͷखॱΛ౿Ή͚ͩͰσʔλΛอଘ͢Δ͜ͱ͕Ͱ͖·͢ɻ ˞ঘɺϞσϧ໊ʢΫϥε໊ʣ͸ӳޠͷ୯਺ܗʹ͢Δϧʔϧ͕͋Γ·͢ɻ

CPPLT#PPLBMM جຊతͳϞσϧͷ࢖͍ํಡΈग़͠ฤ #PPLBMMͰอଘ͞Ε͍ͯΔ#PPL.PEFMͷશσʔλΛऔಘͰ͖·͢ɻ ʢҎલʹઆ໌ͨ͠Ұཡը໘ JOEFYΞΫγϣϯ Ͱ͜ͷϝιου͕࢖ΘΕ͍ͯ·͢ʣ #PPLBMM͢Δͱ഑ྻʹ#PPLΦϒδΣΫτ͕٧·ͬͯฦ͖ͬͯ·͢ɻ CPPL#PPLXIFSF UJUMFϋνϛπͱΫϩʔόʔ CPPLUJUMF‎ϋνϛπͱΫϩʔόʔ
CPPLNFNP‎ඒେΛ෣୆ʹͨ͠੨य़ϥϒίϝ XIFSFϝιουΛ࢖͏ͱݕࡧ͕Ͱ͖·͢ɻ λΠτϧ͕ϋνϛπͱΫϩʔόʔͰ͋Δ#PPLΦϒδΣΫτ͕ฦΓ·͢ɻ #PPLΦϒδΣΫτ͸UJUMFϝιουͰλΠτϧΛɺ NFNPϝιουͰϝϞΛͦΕͧΕฦ͠·͢ɻ ͖͞΄Ͳอଘͨ͠σʔλΛಡΈऔͬͯΈ·͠ΐ͏ɻ

CPPL#PPLOFX UJUMF޷͖ͳλΠτϧ NFNP޷͖ͳίϝϯτ ࣮शSBJMTDPOTPMFͰϞσϧΛ࢖ͬͯΈΔ CPPLTBWF ‏อଘ͠·͢ 3BJMTʹ͸3VCZͰ͍͏JSCͷΑ͏ͳɺ ߦͣͭίʔυΛ࣮ߦ͢Δػೳ͕͋Γ·͢ɻ CVOEMFFYFDSBJMTD Q‏͜͜ʹίʔυΛଧͪ·͢ɻ
#PPLMBTU ‏࠷ޙͷσʔλΛऔಘ͠·͢ ্Ͱอଘͨ͠஋ͷ֬ೝ ‏վߦ͸ෆཁ IUUQMPDBMIPTUCPPLT ϒϥ΢βͰΞΫηε DECPPLT@BQQ CVOEMFFYFDSBJMTD ‏D͸DPOTPMFͷུ ·ͨɺ͜͜Ͱอଘͨ͠σʔλ͸ϒϥ΢β͔Β΋ݟΔ͜ͱ͕Ͱ͖·͢ɻ CVOEMFFYFDSBJMTT SBJMTαʔόΛىಈ લ४උͰͭͬͨ͘ΞϓϦ΁Ҡಈͯ͠ɺSBJMTDPOTPMFΛ࢖ͬͯΈ·͠ΐ͏ɻ ‏3BJMT3PPUϑΥϧμ΁Ҡಈ ҎԼͷίʔυΛ࣮ߦͯ͠Έ͍ͯͩ͘͞ɻ

࣍͸ɺϞσϧͷίʔυΛݟͯɺ Ϟσϧͷ࢓૊ΈΛղઆ͍͖ͯ͠·͢ɻ Ϟσϧͷίʔυ͸BQQNPEFMTҎԼʹ͋Γ·͢ɻ

#PPLϞσϧͷίʔυ DMBTT#PPL"DUJWF3FDPSE#BTF BUUS@BDDFTTJCMFNFNP UJUMF FOE BQQNPEFMTCPPLSC #PPLϞσϧʹ͸ίʔυ͕΄ͱΜͲ͋Γ·ͤΜɻ BUUS@BDDFTTJCMFͱ͍͏ߦ͸ηΩϡϦςΟͷͨΊʹඞཁͳίʔυͰ͢ɻ NFNPͱUJUMFҎ֎ͷཁૉΛ୅ೖෆՄʹ͢ΔͷҙͰ͢ɻ ‏ηΩϡϦςΟ্ɺඞཁͳίʔυ
Ͱ͸ɺTBWF΍BMMͱ͍ͬͨϝιου͕࢖͑Δͷ͸ͳͥͰ͠ΐ͏͔ʁ ·ͨɺUJUMF΍NFNPͱ͍ͬͨཁૉ͕͋Δ͜ͱΛͲ͜Ͱ஌ΔͷͰ͠ΐ͏͔ʁ

#PPLϞσϧͷίʔυ DMBTT#PPL"DUJWF3FDPSE#BTF BUUS@BDDFTTJCMFNFNP UJUMF FOE BQQNPEFMTCPPLSC ౴͑ɽ"DUJWF3FDPSE#BTFΫϥεΛܧঝ͍ͯ͠Δ͔Β "DUJWF3FDPSE#BTFΫϥε͕Ϟσϧͷ࢓ࣄʹඞཁͳػೳΛ͍࣋ͬͯ· ͢ɻͦΕΛܧঝ͍ͯ͠Δ#PPLΫϥε΋ಉ͡ػೳΛ࣋ͭ͜ͱ͕Ͱ͖·͢ɻ ໰TBWF΍BMMͱ͍ͬͨϝιου͕࢖͑Δͷ͸ͳͥͰ͠ΐ͏͔ʁ

#PPLϞσϧͷίʔυ ౴͑ɽσʔλϕʔε͔Β৘ใΛಘ·͢ "DUJWF3FDPSE#BTF͸σʔλϕʔε͔Β৘ใΛಘͯɺ #PPLϞσϧʹUJUMF NFNPͱ͍͏ཁૉ͕͋Δ͜ͱΛ஌͍ͬͯ·͢ɻ CPPLUJUMF΍CPPLNFNPͱ͍͏ϝιουΛఏڙ͠·͢ɻ ໰UJUMF΍NFNPͱ͍ͬͨཁૉ͕͋Δ͜ͱΛͲ͜Ͱ஌ΔͷͰ͠ΐ͏͔ʁ σʔλϕʔεͱ͸ԿͰ͠ΐ͏͔ʁ

σʔλϕʔε %# ͱ͸ʁ Ϟσϧ͸%#Λศརʹ͔ͭ͏ͨΊͷ࢓૊ΈͰ΋͋Γ·͢ɻ %#͸ߴػೳͰݎ࿚Ͱ͔ͭߴ଎Ͱ͢ɻ͔͠͠ɺ%#ʹΞΫηε͢Δʹ͸Ұൠʹઐ༻ͷݴޠ 42-ͱݴ͍·͢ Λ༻͍Δ͜ͱ͕ଟ͘ɺ3VCZͷίʔυ͔Β͸ѻ͍ͮΒ͍໘΋ɻϞσϧ ͸3VCZͰ%#Λ༰қʹѻ͏͜ͱ͕Ͱ͖Δػೳ΋ఏڙ͠·͢ɻ σʔλΛอଘͨ͠ΓಡΈग़ͨ͠Γݕࡧͨ͠Γ͢ΔͨΊʹ ಛԽͨ͠ϓϩάϥϜͰ͢ɻ
.PEFM͕؆୯ʹ%#ʹΞΫηεͰ͖ΔػೳΛఏڙ͢ΔͷͰɺ ϓϩάϥϚ͸.PEFMΛ௨ͯ͡%#ͱσʔλΛ΍ΓͱΓͰ͖Δɻ %# .PEFM ϓϩάϥϚ

Ͱ͸ɺ%#͸͍ͭͷ·ʹ ࡞ΒΕͨͷͰ͠ΐ͏ʁ

SBJMTOFXCPPLT@BQQ ࣮͸ɺTDBGGPMEͰ࡞ͬͯ·ͨ͠ DECPPLT@BQQ CVOEMFFYFDSBJMTHTDBGGPMECPPLT UJUMFTUSJOHNFNPUFYU CVOEMFFYFDSBLFECNJHSBUF IUUQMPDBMIPTUCPPLT CVOEMFFYFDSBJMTT ϒϥ΢βͰ্هͷΞυϨε΁ΞΫηε

TDBGGPME͸%#ͷઃܭਤΛͭ͘Γɺ CVOEMFFYFDSBJMTHTDBGGPMECPPLT UJUMFTUSJOHNFNPUFYU CVOEMFFYFDSBLFECNJHSBUF SBLFECNJHSBUFͰ ઃܭਤΛ΋ͱʹ%#Λ࡞Γ·͢ɻ

TDBGGPME͸Ϟσϧͱ%#ઃܭਤ΋࡞Γ·͢ɻ CVOEMFFYFDSBJMTHTDBGGPMECPPLT UJUMFTUSJOHNFNPUFYU ࡞ΒΕΔϑΝΠϧͷதͰؔ܎͢Δ΋ͷ Ϟσϧ BQQNPEFMTCPPLSC %#ઃܭਤ ECNJHSBUF@DSFBUF@CPPLTSC %#ઃܭਤͱ͸ͲΜͳ΋ͷ͔ɺݟͯΈ·͠ΐ͏ɻ

%#ઃܭਤNJHSBUJPO DMBTT$SFBUF#PPLT"DUJWF3FDPSE.JHSBUJPO EFGDIBOHF DSFBUF@UBCMFCPPLTEPcUc UTUSJOHUJUMF UUFYUNFNP UUJNFTUBNQT FOE FOE FOE
BQQECNJHSBUF@DSFBUF@CPPLTSC %#ͷઃܭਤΛNJHSBUJPO ϚΠάϨʔγϣϯ ϑΝΠϧͱݺͼ·͢ɻ NJHSBUJPO΋3BJMT 3VCZ ͷίʔυͰॻ͔Ε͍ͯ·͢ɻ

BQQECNJHSBUF@DSFBUF@CPPLTSC CPPLTͱ͍͏໊લͷςʔϒϧΛ࡞Γ·͢ɻ%#͸ςʔϒϧͱ͍͏୯ҐͰ σʔλΛ؅ཧ͠·͢ɻ͜ͷΞϓϦͷຊʹؔ͢ΔσʔλΛอଘ͢ΔͨΊ ʹɺCPPLTͱ͍͏໊લͷςʔϒϧΛ࡞͍ͬͯ·͢ɻ ˞ςʔϒϧ໊͸Ϟσϧ໊ͷෳ਺ܗʹ͢Δͱ͍͏ݪଇ͕͋Γ·͢ɻ

BQQECNJHSBUF@DSFBUF@CPPLTSC CPPLTςʔϒϧ͸UJUMFͱ͍͏ཁૉͱɺNFNPͱ͍͏ཁૉΛ࣋ͪ·͢ɻ ʢ͜ͷཁૉͷ͜ͱΛ%#༻ޠͰΧϥϜͱ͍͍·͢ɻʣ ·ͨɺ࡞੒೔࣌΍ߋ৽೔࣌Λه࿥͢ΔཁૉΛ࣋ͪ·͢ɻ UUJNFTUBNQT͕࡞੒͠·͢ɻ

BQQECNJHSBUF@DSFBUF@CPPLTSC CPPLTςʔϒϧ %#ͷςʔϒϧ͸ɺ &YDFMΛΠϝʔδ͢Δͱ ෼͔Γқ͍ͱࢥ͍·͢ɻ ৽͘͠σʔλΛ ೖΕΔͱ͖͸ ͜ͷελΠϧ‎ Ͱอଘ͍ͯ͠ ͘ɻ

BQQECNJHSBUF@DSFBUF@CPPLTSC ͱ͜ΖͰԼઢ෦ͷ෦෼ɺݟ͕֮͑͋Γ·ͤΜ͔ʁ

BQQECNJHSBUF@DSFBUF@CPPLTSC ࣮͸TDBGGPMEͰࢦఆ͍ͯͨ͠ͷ͸͜ͷ෦෼Ͱ͢ɻ CVOEMFFYFDSBJMTHTDBGGPMECPPLT UJUMFTUSJOHNFNPUFYU

BQQECNJHSBUF@DSFBUF@CPPLTSC CVOEMFFYFDSBJMTHTDBGGPMECPPLTUJUMFTUSJOHNFNPUFYU TDBGGPMEͰࢦఆ͍ͯͨ͠ͷ͸ςʔϒϧ໊ͱΧϥϜͰͨ͠ɻ TUSJOH͸σʔλͷܕͰ͢ɻจࣈྻΛ֨ೲͰ͖·͢ɻ UFYU΋σʔλͷܕͰ TUSJOHΑΓ΋ଟ͘ จࣈྻΛ֨ೲͰ͖·͢ɻ

TDBGGPME͸%#ઃܭਤ NJHSBUJPO Λ࡞Δ͜ͱΛઆ໌͠·ͨ͠ CVOEMFFYFDSBJMTHTDBGGPMECPPLT UJUMFTUSJOHNFNPUFYU DMBTT$SFBUF#PPLT"DUJWF3FDPSE.JHSBUJPO EFGDIBOHF DSFBUF@UBCMFCPPLTEPcUc UTUSJOHUJUMF UUFYUNFNP
UUJNFTUBNQT FOE FOE FOE BQQECNJHSBUF@DSFBUF@CPPLTSC ˞ϑΝΠϧ໊ઌ಄ͷ͸ଞͷϑΝΠϧͱॏෳ͠ͳ͍Α͏ʹ3BJMT͕ࣗಈͰ͚ͭ·͢ɻ ϑΝΠϧੜ੒

TDBGGPME͸%#ઃܭਤ NJHSBUJPO Λ࡞Δ͜ͱΛઆ໌͠·ͨ͠ CVOEMFFYFDSBJMTHTDBGGPMECPPLTUJUMFTUSJOHNFNPUFYU DMBTT$SFBUF#PPLT"DUJWF3FDPSE.JHSBUJPO EFGDIBOHF DSFBUF@UBCMFCPPLTEPcUc UTUSJOHUJUMF UUFYUNFNP UUJNFTUBNQT
FOE FOE FOE BQQECNJHSBUF@DSFBUF@CPPLTSC ϑΝΠϧੜ੒ ʁʁʁ %# Ͱ͸ɺNJHSBUJPO͔Β ࣮ࡍʹ%#Λ࡞Δʹ͸ Ͳ͏͢Ε͹ ͍͍Ͱ͠ΐ͏ʁ

%#ઃܭਤ NJHSBUJPO ͔Β%#Λ࡞Δͷ͕ SBLFECNJHSBUFίϚϯυͰ͢ CVOEMFFYFDSBJMTHTDBGGPMECPPLTUJUMFTUSJOHNFNPUFYU DMBTT$SFBUF#PPLT"DUJWF3FDPSE.JHSBUJPO EFGDIBOHF DSFBUF@UBCMFCPPLTEPcUc UTUSJOHUJUMF UUFYUNFNP
UUJNFTUBNQT FOE FOE FOE BQQECNJHSBUF@DSFBUF@CPPLTSC ϑΝΠϧੜ੒ CVOEMFFYFDSBLFECNJHSBUF NJHSBUJPOϑΝΠϧ %#ઃܭਤ ͔Β%#Λ࡞Δ %# CPPLTςʔϒϧ UJUMF NFNP DSFBUFE@BU VQEBUFE@BU

Ͱ͸ɺTDBGGPMEͰ࡞ΒΕΔ NPEFMɺNJHSBUJPOͷ ·ͱΊͰ͢ɻ

TDBGGPMEίϚϯυΛଧͭͱ CVOEMFFYFDSBJMTHTDBGGPMECPPLTUJUMFTUSJOHNFNPUFYU

CVOEMFFYFDSBJMTHTDBGGPMECPPLTUJUMFTUSJOHNFNPUFYU DMBTT$SFBUF#PPLT"DUJWF3FDPSE.JHSBUJPO EFGDIBOHF DSFBUF@UBCMFCPPLTEPcUc UTUSJOHUJUMF UUFYUNFNP UUJNFTUBNQT FOE FOE FOE
BQQECNJHSBUF@DSFBUF@CPPLTSC NJHSBUJPOϑΝΠϧ DMBTT#PPL"DUJWF3FDPSE#BTF BUUS@BDDFTTJCMFNFNP UJUMF FOE BQQNPEFMTCPPLSC NPEFMϑΝΠϧ ϑΝΠϧੜ੒ ϑΝΠϧੜ੒ TDBGGPMEίϚϯυΛଧͭͱϑΝΠϧΛੜ੒͠·͢

BQQECNJHSBUF@DSFBUF@CPPLTSC NJHSBUJPOϑΝΠϧ CVOEMFFYFDSBLFECNJHSBUF DMBTT#PPL"DUJWF3FDPSE#BTF BUUS@BDDFTTJCMFNFNP UJUMF FOE BQQNPEFMTCPPLSC NPEFMϑΝΠϧ ϑΝΠϧੜ੒ ϑΝΠϧੜ੒ ଓ͍ͯSBLFECNJHSBUFίϚϯυΛଧͭͱɺ

BQQECNJHSBUF@DSFBUF@CPPLTSC NJHSBUJPOϑΝΠϧ %# CPPLTςʔϒϧ UJUMF NFNP DSFBUFE@BU VQEBUFE@BU CVOEMFFYFDSBLFECNJHSBUF NJHSBUJPOϑΝΠϧ %#ઃܭਤ ͔Β%#Λ࡞Δ DMBTT#PPL"DUJWF3FDPSE#BTF BUUS@BDDFTTJCMFNFNP UJUMF FOE BQQNPEFMTCPPLSC NPEFMϑΝΠϧ ϑΝΠϧੜ੒ ϑΝΠϧੜ੒ ଓ͍ͯSBLFECNJHSBUFίϚϯυΛଧͭͱɺ%#͕࡞ΒΕ·͢

BQQECNJHSBUF@DSFBUF@CPPLTSC NJHSBUJPOϑΝΠϧ %# CPPLTςʔϒϧ UJUMF NFNP DSFBUFE@BU VQEBUFE@BU CVOEMFFYFDSBLFECNJHSBUF NJHSBUJPOϑΝΠϧ %#ઃܭਤ ͔Β%#Λ࡞Δ DMBTT#PPL"DUJWF3FDPSE#BTF BUUS@BDDFTTJCMFNFNP UJUMF FOE BQQNPEFMTCPPLSC NPEFMϑΝΠϧ ϑΝΠϧੜ੒ ϑΝΠϧੜ੒ Ͱ͖ͨNPEFMϑΝΠϧͱ%#Λར༻ͯ͠ΞϓϦ͸ಈ͖·͢ɻ

CPPL#PPLOFX UJUMFϋνϛπͱΫϩʔόʔ NFNPඒେΛ෣୆ʹͨ͠੨य़ϥϒίϝ #PPLOFXͰ#PPL.PEFMΦϒδΣΫτΛ࡞Γ·͢ɻ Ҿ਺ͰUJUMF NPEFMͱ͍֤ͬͨΧϥϜͷσʔλΛ౉ͤ·͢ɻ CPPLTBWF TBWFϝιουΛݺͿͱอଘͰ͖·͢ɻ ˞Ϟσϧ໊ʢΫϥε໊ʣ͸ӳޠͷ୯਺ܗʹ͢Δϧʔϧ͕͋Γ·͢ɻ %#
CPPLTςʔϒϧ UJUMF NFNP DSFBUFE@BU VQEBUFE@BU DMBTT#PPL"DUJWF3FDPSE#BTF BUUS@BDDFTTJCMFNFNP UJUMF FOE ʲNPEFMʳBQQNPEFMTCPPLSC Ϟσϧͷ࢖͍ํ

CPPLT#PPLBMM #PPLBMMͰ%#ʹอଘ͞Ε͍ͯΔ#PPL.PEFMͷશσʔλΛऔಘͰ͖·͢ɻ #PPLBMM͢Δͱ഑ྻʹ#PPLΦϒδΣΫτ͕٧·ͬͯฦ͖ͬͯ·͢ɻ CPPL#PPLXIFSF UJUMFϋνϛπͱΫϩʔόʔ CPPLUJUMF‎ϋνϛπͱΫϩʔόʔ CPPLNFNP‎ඒେΛ෣୆ʹͨ͠੨य़ϥϒίϝ XIFSFϝιουΛ࢖͏ͱݕࡧ͕Ͱ͖·͢ɻ λΠτϧ͕ϋνϛπͱΫϩʔόʔͰ͋Δ#PPLΦϒδΣΫτ͕ฦΓ·͢ɻ ݕࡧͰऔΕͨ#PPLΦϒδΣΫτ͸ɺUJUMFϝιουͰλΠτϧΛɺ
NFNPϝιουͰϝϞΛͦΕͧΕऔಘͰ͖·͢ɻ %# CPPLTςʔϒϧ UJUMF NFNP DSFBUFE@BU VQEBUFE@BU DMBTT#PPL"DUJWF3FDPSE#BTF BUUS@BDDFTTJCMFNFNP UJUMF FOE ʲNPEFMʳBQQNPEFMTCPPLSC Ϟσϧͷ࢖͍ํ͖ͭͮ

Ԡ༻ฤɿ طଘͷ%# .PEFM ʹ ΧϥϜΛ૿΍͢ʹ͸ʁ

طଘͷ%#ςʔϒϧ .PEFM ʹΧϥϜΛ૿΍͢ʹ͸ʁ CVOEMFFYFDSBJMTHNJHSBUJPO"EE"VUIPS5P#PPLTBVUIPSTUSJOH SBJMTHίϚϯυʹNJHSBUJPOΛࢦఆ͢ΔͱNJHSBUJPOϑΝΠϧ͚ͩ Λੜ੒Ͱ͖·͢ɻ ͨͱ͑͹ɺCPPLTςʔϒϧʹTUSJOHܕͷBVUIPSΛՃ͑Δʹ͸ҎԼͷΑ͏ʹ͠·͢ɻ CVOEMFFYFDSBJMTHNJHSBUJPO"EEΧϥϜ໊5Pςʔϒϧ໊ΧϥϜ໊ܕ໊ SBJMTHNJHSBUJPOίϚϯυͷجຊܗ͸ҎԼʹͳΓ·͢ɻ

طଘͷ%#ςʔϒϧ .PEFM ʹΧϥϜΛ૿΍͢ʹ͸ʁ CVOEMFFYFDSBJMTHNJHSBUJPO"EE"VUIPS5P#PPLTBVUIPSTUSJOH SBJMTHίϚϯυʹNJHSBUJPOΛࢦఆ͢ΔͱNJHSBUJPOϑΝΠϧ͚ͩ Λੜ੒Ͱ͖·͢ɻ ͨͱ͑͹ɺCPPLTςʔϒϧʹTUSJOHܕͷBVUIPSΛՃ͑Δʹ͸ҎԼͷΑ͏ʹ͠·͢ɻ NJHSBUJPOϑΝΠϧੜ੒ ‏CPPLTςʔϒϧʹBVUIPSΛTUSJOHܕͰ௥Ճ ͷҙ
DMBTT"EE"VUIPS5P#PPLT"DUJWF3FDPSE.JHSBUJPO EFGDIBOHF BEE@DPMVNOCPPLT BVUIPS TUSJOH FOE FOE CVOEMFFYFDSBLFECNJHSBUF %# CPPLTςʔϒϧ UJUMF NFNP BVUIPS DSFBUFE@BU VQEBUFE@BU NJHSBUJPO͔Β%#Λ࡞Δ ECNJHSBUF@BEE@BVUIPS@UP@CPPLTSC

ͪͳΈʹɺ3BJMTͷHFOFSBUFػೳ͸։ൃΛΞγετ͢Δػೳͳ ͷͰɺ࢖Θͳ͍Ͱ͔ΒखͰίʔυΛॻ͍ͯ΋ಉ༷ʹಈ͖·͢ɻ CVOEMFFYFDSBJMTHNJHSBUJPO"EE"VUIPS5P#PPLTBVUIPSTUSJOH NJHSBUJPOϑΝΠϧੜ੒ DMBTT"EE"VUIPS5P#PPLT"DUJWF3FDPSE.JHSBUJPO EFGDIBOHF BEE@DPMVNOCPPLT BVUIPS TUSJOH FOE
FOE ECNJHSBUF@BEE@BVUIPS@UP@CPPLTSC ํ๏"SBJMTHΛ࢖͏ํ๏ DMBTT"EE"VUIPS5P#PPLT"DUJWF3FDPSE.JHSBUJPO EFGDIBOHF BEE@DPMVNOCPPLT BVUIPS TUSJOH FOE FOE ECNJHSBUF@BEE@BVUIPS@UP@CPPLTSC ํ๏#͔ΒखͰίʔυΛॻ͘ํ๏ ΤσΟλͰ͜ͷϑΝΠϧ໊Ͱ ‏͜ͷ಺༰Λॻ͘ ͨͱ͑͹ɺҎԼͷํ๏"ͱํ๏#ɺͲͪΒ΋ಉ͡Α͏ʹಈ࡞͠·͢ɻ ΄͔ͷSBJMTHίϚϯυɺTDBGGPME΍DPOUSPMMFSͳͲ΋શͯಉ͜͡ͱ͕ݴ͑·͢ɻ

Ԡ༻ฤɿ ৽͍͠ϞσϧͱNJHSBUJPOΛ ࡞Δʹ͸ʁ

.PEFMͱNJHSBUJPOΛੜ੒͢Δʹ͸ SBJMTHίϚϯυʹNPEFMΛࢦఆ͢ΔͱNPEFMͱNJHSBUJPOΛੜ੒ Ͱ͖·͢ɻ CVOEMFFYFDSBJMTHNPEFMCPPLTUJUMFTUSJOHNFNPUFYU ECNJHSBUF@DSFBUF@CPPLTSC BQQNPEFMTCPPLTSC

SBJMTH͋Ε͜Ε NJHSBUJPO͚ͩ CVOEMFFYFDSBJMTHNPEFMCPPLTUJUMFTUSJOHNFNPUFYU CVOEMFFYFDSBJMTHNJHSBUJPO"EE"VUIPS5P#PPLTBVUIPSTUSJOH NPEFM NJHSBUJPO CVOEMFFYFDSBJMTHDPOUSPMMFSCPPLTJOEFY SPVUFT DPOUSPMMFS WJFX
TDBGGPME NPEFM NJHSBUJPO SPVUFT DPOUSPMMFS WJFX CVOEMFFYFDSBJMTHTDBGGPMECPPLTUJUMFTUSJOHNFNPUFYU

෇࿥

ΑΓৄ͘͠஌Γ͍ͨਓ͸ ҎԼͷϖʔδ͕ࢀߟʹͳΓ·͢ɻ IUUQHVJEFTSVCZPOSBJMTPSHHFUUJOH@TUBSUFEIUNM ೔ຊޠͷࢿྉ͕ྑ͍ํ͸ ͜ͷຊ͕қ͠ΊͰ͢ɻ վగ৽൛جૅ3VCZPO3BJMT IUUQXXXBNB[PODPKQEQ

σόοάͷํ๏ ϒϥ΢βʹදࣔ͞ΕΔΤϥʔΛಡΉ SBJMTTFSWFSͷग़ྗΛ֬ೝ ϩάΛ֬ೝ ϩάΛग़ྗ QSZΛ࢖͏ $ISPNFͷσόοάػೳΛ࢖͏

ϒϥ΢βʹදࣔ͞ΕΔΤϥʔΛಡΉ ΤϥʔྫͦΜͳ63-஌Βͳ͍ ΤϥʔྫSBJMTTFSWFS͕ىಈ͍ͯ͠ͳ͍

ϒϥ΢βʹදࣔ͞ΕΔΤϥʔΛಡΉ Τϥʔྫ BQQDPOUSPMMFST CPPLT@DPOUSPMMFSSC ͷߦ໨ͰCBS͍ͬͯ͏஌Β ͳ͍΋ͷ͕͋ΔͷͰΤϥʔͩ Αɻ

SBJMTTFSWFSͷग़ྗΛ֬ೝ SBJMTTΛ࣮ߦͨ͠TIFMMΛݟΔͱɺΞΫηεͷͨͼʹԿ͔͕ ग़ྗ͞Ε͍ͯΔ͜ͱ͕෼͔Γ·͢ɻ

SBJMTTFSWFSͷग़ྗΛ֬ೝ Τϥʔ͕ى͜Δͱͦͷࢫ΋දࣔ͞Ε·͢ɻ ΤϥʔྫGPPʹΞΫηε͚ͨ͠ͲɺͦΜͳ63-஌Βͳ͍

SBJMTTFSWFSͷग़ྗΛ֬ೝ Τϥʔ͕ى͜Δͱͦͷࢫ΋දࣔ͞Ε·͢ɻ BQQDPOUSPMMFSTCPPLT@DPOUSPMMFSSCͷߦ໨Ͱ CBS͍ͬͯ͏஌Βͳ͍΋ͷ͕͋ΔͷͰΤϥʔͩΑɻ

ϩάͷ֬ೝ MPHEFWFMPQNFOUMPH ্هͷϑΝΠϧʹϩά͕ग़ྗ͞Ε·͢ɻ಺༰͸SBJMT TFSWFS͕ग़ྗ͍ͯ͠Δ΋ͷͱࣅ͍ͯ·͕͢ɺϩά ͷํ͕ৄ͍͠৘ใ͕ग़͍ͯΔ͜ͱ΋͋Γ·͢ɻ ΤσΟλͰ։͍ͯ֬ೝͯ͠΋͍͍Ͱ͕͢ɺϩά͕௥ ه͞ΕΔ͝ͱʹϦϩʔυ͢Δඞཁ͕͋Γ·͢ɻ ը໘ʹ࣍ʑͱߋ৽͞Εͨ಺༰Λදࣔ͢Δʹ͸ҎԼͷ ίϚϯυ͕ศརͰ͢ɻ UBJMGMPHEFWFMPQNFOUMPH
˞UBJM͸MJOVY NBDͷΈɻXJOͰ͸Ͱ͖ͳ͍Ͱ͢ɻ

ϩάΛग़ྗ ιʔεϑΝΠϧதͰม਺ͷத਎Λදࣔͨ͠Γɺॲཧ ͕Ͳ͜·ͰਐΜ͔ͩ஌Γ͍ͨ৔߹ʹ͸ϩάΛग़ྗ͢ Δͷ͕ศརͰ͢ɻ ͜͜Ͱ͸ͭͷํ๏Λઆ໌͠·͢ɻ

TIFMMʹදࣔQ 3VCZͷQϝιου͕3BJMTͰ΋࢖͑·͢ɻ Qϝιου͸จࣈྻΛSBJMTTFSWFSͷTIFMMʹදࣔ͠·͢ɻ ˞ද͚ࣔͩͰMPHEFWFMPQNFOUMPHʹ͸ग़ྗ͠ͳ͍ͷͰ஫ҙ DMBTT#PPLT$POUSPMMFS"QQMJDBUJPO$POUSPMMFS EFGJOEFY !CPPLT#PPLBMM Q Q!CPPLT
FOE FOE ‏୳͠қ͍Α͏ʹ໨ཱͭจࣈΛදࣔ͢Δͱศར ‏QϝιουͰ!CPPLTͷத਎Λදࣔ

ϩάʹදࣔ3BJMTMPHHFS 3BJMTMPHHFSFSSPSΛ࢖͏ͱMPHEFWFMPQNFOUMPH΁ม ਺ͷத਎΍จࣈྻΛग़ྗͰ͖·͢ɻ ࢖͍ํ͸Qͱಉ͡Ͱ͢ɻ ˞SBJMTTFSWFSͷTIFMMʹ͸දࣔ͠·ͤΜɻ DMBTT#PPLT$POUSPMMFS"QQMJDBUJPO$POUSPMMFS EFGJOEFY !CPPLT#PPLBMM 3BJMTMPHHFSFSSPS
3BJMTMPHHFSFSSPS!CPPLT FOE FOE ‏໨ҹ ‏!CPPLTͷத਎Λදࣔ

$ISPNFͰσόοά $ISPNFͷσϕϩούʔπʔϧΛ࢖͏ͱϦΫΤετͷ ৘ใ͕දࣔͰ͖ͨΓͯ͠ศརͰ͢ɻ $ISPNFͷදࣔ։ൃ؅ཧσϕϩούʔπʔϧ ΛબΜͰσϕϩούʔπʔϧΛىಈ͠·͢ɻ ‏͜Μͳͷ͕ දࣔ͞Ε·͢ɻ

$ISPNFͰσόοά ϦΫΤετͷ৘ใΛදࣔͤ͞Δʹ͸σϕϩούʔπʔϧͷ /FUXPSLλϒΛԡͯ͠ද͓͖ࣔͯ͠·͢ɻ ͜ͷঢ়ଶͰද͍ࣔͤͨ͞ϦΫΤετΛߦ͍·͢ɻ ྫͱͯ͠ɺCPPLTϖʔδ΁ΞΫηεͯ͠Έ·͠ΐ͏ɻ

·ͬ͞Βʹͯ͠΋͏ճ࣮ߦ͍ͨ͠ͱ͖͸ɺ Ұ൪ԼͷϚʔΫΛΫϦοΫ͢ΔͱɺදࣔΛΫϦΞ ͢Δ͜ͱ͕Ͱ͖·͢ɻ $ISPNFͰσόοά ͳΜ͔͍Ζ͍Ζදࣔ͞Ε·ͨ͠ɻҰ൪࠷ॳͷCPPLTΛΫ ϦοΫͯ͠Έ·͠ΐ͏ɻ

ϦΫΤετͷৄࡉ͕දࣔ͞Ε·͢ɻϦΫΤετ63-͕ IUUQMPDBMIPTUCPPLTͰ͋Δ͜ͱɺ )551ϝιου͕(&5Ͱ͋Δ͜ͱ͕෼͔Γ·͢ɻ $ISPNFͰσόοά

ͪͳΈʹɺ3FTQPOTFλϒΛදࣔͤ͞ΔͱϦΫΤετ ͷ݁Ռฦ͖ͬͯͨ)5.- ݱࡏදࣔ͞Ε͍ͯΔϖʔδ ͕දࣔ͞Ε·͢ɻ $ISPNFͰσόοά ΄͔ʹ΋ศརͳػೳ͕͍Ζ͍Ζ͋Γ·͕͢·ͨͷػձʹɾɾɾ

QSZͰσόοά QSZ͸ϓϩάϥϜͷ࣮ߦΛࢭΊͯɺͦͷ৔ॴͰ 3VCZͷίʔυΛ࣮ߦ͢Δ͜ͱ͕Ͱ͖Δɺ JSCͷΑ͏ͳର࿩؀ڥͰ͢ɻ QSZΛ࢖͏ͨΊʹ͸ɺ·ͣલ४උͱͯ͠ (FNpMFʹHFNQSZΛ௥Ճ͠·͢ɻ Ґஔ͸ྫ͑͹HFNTRMJUFͷ࣍ͷߦ͋ͨΓɻ ˞αʔϏεӡ༻΋ߟ͑ͯͪΌΜͱॻ͘ͳΒ͹ҎԼͷΑ͏ʹͨ͠ํ͕ྑ͍Ͱ͕͢ɺׂѪɻ HSPVQEFWFMPQNFOU UFTUEPHFNQSZFOE
HFNQSZ ‏௥Ճ (FNpMF ௥Ճͨ͠ΒɺTIFMMͰCVOEMFίϚϯυΛ࣮ߦͯ͠QSZΛΠϯετʔϧ͠·͢ɻ CVOEMF

QSZͰσόοά ࣍ʹɺιʔείʔυͰࢭΊ͍ͨ৔ॴ΁ CJOEJOHQSZͱॻ͖·͢ɻ ྫͱͯ͠ɺCPPLT΁ΞΫηε͞Εͨͱ͖ʹఀࢭ͢ ΔΑ͏ʹ#PPLT$POUSPMMFSͷJOEFYΞΫγϣ ϯʹॻ͍ͯΈ·͠ΐ͏ɻ DMBTT#PPLT$POUSPMMFS"QQMJDBUJPO$POUSPMMFS EFGJOEFY !CPPLT#PPLBMM CJOEJOHQSZ
FOE FOE ‏௥ه IUUQMPDBMIPTUCPPLT SBJMTTFSWFSΛ࠶ىಈͯ͠ɺϒϥ΢βͰΞΫηεͯ͠Έ·͠ΐ͏ɻ

QSZͰσόοά ϒϥ΢βͰΞΫηεޙɺSBJMTTFSWFSͷTIFMMΛݟΔͱϓϩάϥϜ͕ ఀࢭͯ͠ίϚϯυΛଧͯΔΑ͏ʹͳ͍ͬͯ·͢ɻ JSCͱಉ͡Α͏ʹ3VCZͷίʔυ͕࣮ߦͰ͖·͢ɻ

QSZͰσόοά ίʔυΛ࣮ߦͰ͖ΔͷͰɺม਺ͷத਎ΛQͰදࣔͰ͖·͢ɻ ʢ࣮͸ɺQΛଧͨͳͯ͘΋!CPPLTͱଧ͚ͭͩͰ΋දࣔͰ͖Δɻʣ QSZΛऴྃͯ͠ϓϩάϥϜΛ࠶։͢Δʹ͸FYJUͱଧͪ·͢ɻ

ߨٛࢿྉஔ͖৔ աڈͷࢿྉ͕%-Ͱ͖·͢ɻ IUUQTHJUIVCDPNIJUPUTVCBTIJSVCZMFDUVSF PS IUUQCJUMZSVCZMFDUVSF

ࡶஊɾ࣭໰༻GBDFCPPLάϧʔϓ IUUQTXXXGBDFCPPLDPNHSPVQTIJUPUTVCBTIJSC ɾՃೖඇՃೖ͸ࣗ༝Ͱ͢ ɾՃೖඇՃೖ͸੒੷ʹؔ܎͠·ͤΜ ɾࢀՃऀҰཡ͸ެ։͞Ε·͢ ɾॻ͖ࠐΈ͸ࢀՃऀͷΈݟ͑·͢ ɾر๬ऀ͸ΞΫηεͯ͠ࢀՃਃ੥͍ͯͩ͘͠͞ ɾࡶஊɺ࣭໰ɺٞ࿦ͳͲԿͰ΋ؾʹͤͣͲ͏ͧʙ ɾ࣭໰ʹ౴͑ΒΕΔਓ͸౴͍͑ͯ͋͛ͯͩ͘͞ ɾߨࢣਞ΋͓౴͑͠·͢
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Rails講義 第25回 model

Rails講義 第25回 model

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Rails講義第25回 model

Rails講義第25回 model