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The underground in ActiveRecord::ConnectionAdapters
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Koichi ITO
March 10, 2018
Programming
6
3.3k
The underground in ActiveRecord::ConnectionAdapters
沖縄Ruby会議02
http://ruby.okinawa/okrk02/
Koichi ITO
March 10, 2018
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Transcript
"DUJWF3FDPSE $POOFDUJPO"EBQUFST ͷԼͷੈ ք ླྀٿେֶֶ෦߸ؗ 4BU ԭೄ3VCZձٞ 5IFVOEFSHSPVOEJO"3$POOFDUJPO"EBQUFST %JWFUPUIFSBJMTSBJMTSFQPTJUPSZ
ג ӬγεςϜϚωδϝϯτ ҏ౻ߒҰ !LPJD
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ࠓͷ
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w %JWFUPSBJMTSBJMTSFQP w "3$POOFDUJPO"EBQUFST w 0SBDMFFOIBODFEBEBQUFS w 0SBDMFXJUI3BJMT "HFOEB ˞#BTFEPO3BJMTSD
Dive to rails/rails
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AR::ConectionAdapters
w "3ͷϞσϧܦ༝Ͱͷݺͼग़͠ʹର͠ ͯɺ3%#.4͝ͱʹཧʹ͔ͳͬͨ42- ΛΈཱͯͯฦׂ͢ w 3%#.4ͷ༷Λલఏ͢Δɻྫ͑ 0SBDMFͩͱۭจࣈͱ/6--Λ۠ผ͠ ͳ͍ɺHἬࣝผࢠ͕จࣈҎԼ "3$POOFDUJPO"EBQUFST
SBJMTSBJMTͷςετͰΔ3%#.4ͷ ༷ʹΑΔৼΔ͍ͷҧ͍ DVSSFOU@BEBQUFS
rails/rails#29370
WTOJM
Ξμϓλͷࢦఆͱ 3BJMTΛىಈ࣌ͷ ৼΔ͍ʹ͍ͭͯ
w ͝ଘEBUBCBTFZNMʹࢦఆ͢Δ BEBQUFSͱԿͳͷ͔͍·Ұ $POOFDUJPO"EBQUFSͷબ development: adapter: mysql2 development: adapter: postgresql
development: adapter: sqlite3 development: adapter: oracle_enhanced
w EBUBCBTFZNMͰࢦఆͨ͠Ξμϓλ͕ SBJMTDSBJMTTͰཁٻ͞ΕΔἬͷྲྀΕ "33BJMUJFJOJUJBMJ[FS "3$POOFDUJPO)BOEMJOHFTUBCMJTI@DPOOFDUJ PO "3$POOFDUJPO"EBQUFST$POOFDUJPO4QFDJpD BUJPOTQFD FTUBCMJTI@DPOOFDUJPO
"33BJMUJFJOJUJBMJ[FS IUUQTHJUIVCDPNSBJMTSBJMTCMPCWSDBDUJWFSFDPSEMJCBDUJWF@SFDPSESBJMUJFSC-
"3$POOFDUJPO)BOEMJOH FTUBCMJTI@DPOOFDUJPO IUUQTHJUIVCDPNSBJMTSBJMTCMPCWSDBDUJWFSFDPSEMJCBDUJWF@SFDPSEDPOOFDUJPO@IBOEMJOHSC-
"3$POOFDUJPO"EBQUFST $POOFDUJPO4QFDJpDBUJPOTQFD IUUQTHJUIVCDPNSBJMTSBJMTCMPCWSDBDUJWFSFDPSEMJCBDUJWF@SFDPSEDPOOFDUJPO@BEBQUFSTDPOOFDUJPO@TQFDJpDBUJPOSC-
w EBUBCBTFZNMͷࢦఆBEBQUFS ΛݩʹΞμϓλΛSFRVJSF͢Δ "3$POOFDUJPO"EBQUFST $POOFDUJPO4QFDJpDBUJPOTQFD path_to_adapter = "active_record/connection_adapters/#{spec[:adapter]}_adapter" begin require
path_to_adapter rescue LoadError => e (snip) end (snip) adapter_method = "#{spec[:adapter]}_connection" IUUQTHJUIVCDPNSBJMTSBJMTCMPCWSDBDUJWFSFDPSEMJCBDUJWF@SFDPSEDPOOFDUJPO@BEBQUFSTDPOOFDUJPO@TQFDJpDBUJPOSC-- SFRVJSF
SFRVJSF͞ΕΔ$PSFBEBQUFST
w EBUBCBTFZNMͷࢦఆBEBQUFS ΛݩʹίωΫγϣϯϝιου໊Λܾఆ "3$POOFDUJPO"EBQUFST $POOFDUJPO4QFDJpDBUJPOTQFD path_to_adapter = "active_record/connection_adapters/#{spec[:adapter]}_adapter" begin require
path_to_adapter rescue LoadError => e (snip) end (snip) adapter_method = "#{spec[:adapter]}_connection" IUUQTHJUIVCDPNSBJMTSBJMTCMPCWSDBDUJWFSFDPSEMJCBDUJWF@SFDPSEDPOOFDUJPO@BEBQUFSTDPOOFDUJPO@TQFDJpDBUJPOSC-- @DPOOFDUJPO
IUUQTHJUIVCDPNSBJMTSBJMTCMPCWSDBDUJWFSFDPSEMJCBDUJWF@SFDPSEDPOOFDUJPO@BEBQUFSTNZTRM@BEBQUFSSC- @DPOOFDUJPO
IUUQTHJUIVCDPNSBJMTSBJMTCMPCWSDBDUJWFSFDPSEMJCBDUJWF@SFDPSEDPOOFDUJPO@BEBQUFSTNZTRM@BEBQUFSSC- @DPOOFDUJPO %#$MJFOU
w 3VCZΦϒδΣΫτܦ༝Ͱ.Z42-Λૢ࡞͢Δ ΫϥΠΞϯτͱͳΔυϥΠό(FN require "mysql2" client = Mysql2::Client.new( :host =>
"localhost", :username => "root" ) results = client.query( "SELECT * FROM users WHERE group=‘githubbers'" ) results.each do |row| puts row["id"] # row[“id”].is_a? Integer if row["dne"] # non-existant hash entry is nil puts row["dne"] end end .ZTRMHFN IUUQTHJUIVCDPNCSJBONBSJPNZTRMVTBHF
"3ϞσϧͱυϥΠόͷதؒ $POOFDUJPO"EBQUFST "CTUSBDU"EBQUFS $POOFDUJPO "EBQUFST-BZFS "3.PEFM -BZFS %BUBCBTF $MJFOU-BZFS ˞ਤྫ.Z42-Ξμϓλ
(FNpMFʹࢦఆ ͍ͯ͠Δͷ͜Ε $POOFDUJPO"EBQUFST "CTUSBDU.ZTRM"EBQUFS $POOFDUJPO"EBQUFST .ZTRM"EBQUFS HFN NZTRM .Z42- %BUBCBTF -BZFS "3
"3ϞσϧͱυϥΠόͷதؒ $POOFDUJPO "EBQUFST-BZFS "3.PEFM -BZFS %BUBCBTF $MJFOU-BZFS ˞ਤྫ1PTUHSF42-Ξμϓλ (FNpMFʹࢦఆ ͍ͯ͠Δͷ͜Ε
$POOFDUJPO"EBQUFST 1PTUHSF42-"EBQUFS HFN QH 1PTUHSF42- %BUBCBTF -BZFS $POOFDUJPO"EBQUFST "CTUSBDU"EBQUFS "3
"3ϞσϧͱυϥΠόͷதؒ $POOFDUJPO "EBQUFST-BZFS "3.PEFM -BZFS %BUBCBTF $MJFOU-BZFS ˞ਤྫ42-JUFΞμϓλ (FNpMFʹࢦఆ ͍ͯ͠Δͷ͜Ε
$POOFDUJPO"EBQUFST 42-JUF"EBQUFS HFN TRMJUF 42-JUF %BUBCBTF -BZFS $POOFDUJPO"EBQUFST "CTUSBDU"EBQUFS "3
w EBUBCBTFZNMʹج͍ͮͨ $POOFDUJPO"EBQUFSTΛ͏ w $POOFDUJPO"EBQUFSͷઌͷଓ σʔλϕʔευϥΠόHFNͱͳΔ w NZTRM QH TRMJUFͳͲ
"3ͷσʔλϕʔεଓͷߏ
w SBJMTSBJMTϦϙδτϦͰϝϯςφ ϯε͞Ε͍ͯΔΞμϓλΛࢦ͢ w ݱࡏ.Z42- NZTRM 1PTUHSF42-42-JUFͷͭ w 3BJMTͷ$*ϚτϦοΫεʹೖͬͯΔ
$PSFBEBQUFST
w ֎෦(FNͱͯ͠ཁٻ͞ΕΔΞμϓλ w 0SBDMF w 42-4FSWFS w 'JSFCJSE w FUD
FUD SEQBSUZBEBQUFST
w 3BJMTຊମʹόϯυϧ͞Ε͍ͯΔίΞ ΞμϓλҎ֎͜͜ͰSFRVJSFͯ͠Δ "3$POOFDUJPO"EBQUFST $POOFDUJPO4QFDJpDBUJPOTQFD path_to_adapter = "active_record/connection_adapters/#{spec[:adapter]}_adapter" begin require
path_to_adapter rescue LoadError => e (snip) end (snip) adapter_method = "#{spec[:adapter]}_connection" IUUQTHJUIVCDPNSBJMTSBJMTCMPCWSDBDUJWFSFDPSEMJCBDUJWF@SFDPSEDPOOFDUJPO@BEBQUFSTDPOOFDUJPO@TQFDJpDBUJPOSC-- SFRVJSF ࠶ܝ
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Oracle enhanced adapter
Ҏ߱ͷ։ൃऀ
w SBJMTSBJMTʹଘࡏ͍ͯͨ͠ 0SBDMF"EBQUFSͷ֦ு(FN w &EHF3BJMTʹਵ͍ͯ͠Δ w +%#$ΛͬͨଓΛαϙʔτͯ͠Δ w ͭ·Γ+3VCZαϙʔτΛ͍ͯ͠Δ 0SBDMFFOIBODFEBEBQUFS
0$*+%#$
w ੜ͢Δ$POOFDUJPOΛৼΓ͚͍ͯΔ 0SBDMF&OIBODFE$POOFDUJPO IUUQTHJUIVCDPNSTJNPSBDMFFOIBODFECMPCWSDMJCBDUJWF@SFDPSEDPOOFDUJPO@BEBQUFSTPSBDMF@FOIBODFEDPOOFDUJPOSC
w ৼΓ͚ͷλω36#:@&/(*/& 03"$-&@&/)"/$&%@$0//&$5*0/ IUUQTHJUIVCDPNSTJNPSBDMFFOIBODFECMPCWSDMJCBDUJWF@SFDPSEDPOOFDUJPO@BEBQUFSTPSBDMF@FOIBODFEDPOOFDUJPOSC
0$*$POOFDUJPO .3* $POOFDUJPO "EBQUFST-BZFS "3.PEFM -BZFS %BUBCBTF $MJFOU-BZFS ˞ਤྫ0SBDMFFOIBODFE 0SBDMF&OIBODFE
0$*$POOFDJUPO Ͱܨ͍͛ͯΔ $POOFDUJPO"EBQUFST 0SBDMF&OIBODFE"EBQUFS 0SBDMF %BUBCBTF -BZFS (FNpMFʹࢦఆ ͍ͯ͠Δͷ͜Ε HFN SVCZPDJ $POOFDUJPO"EBQUFST "CTUSBDU"EBQUFS "3
+%#$$POOFDUJPO +3VCZ $POOFDUJPO "EBQUFST-BZFS "3.PEFM -BZFS %BUBCBTF $MJFOU-BZFS ˞ਤྫ0SBDMFFOIBODFE 0SBDMF&OIBODFE
+%#$$POOFDJUPO Ͱܨ͍͛ͯΔ $POOFDUJPO"EBQUFST 0SBDMF&OIBODFE"EBQUFS 0SBDMF %BUBCBTF -BZFS $-"441"5)ʹ +"3Λࢦఆ KBS PKECDKBS $POOFDUJPO"EBQUFST "CTUSBDU"EBQUFS "3
w KSVCZBDUJWFSFDPSEKECDBEBQUFS Ͱཧ͞Ε͍ͯΔ <ิ>0SBDMFҎ֎ͷ+%#$αϙʔτ
A development of Oracle enhanced adapter
w */%&9ʹؔ͢Δ5"#-&41"$&Λࢦఆ Ͱ͖ΔΑ͏ʹରԠͨ͠<> w SBJMTECTDIFNBMPBEͷϚϧνΠϯ αʔτʹରԠͨ͠<> w 3VCZ0$*Λ3VCZͷ #JH%FDJNBMରԠ<SVCZPDJ> ࢥ͍ग़ͷύονબ
w */%&9ʹؔ͢Δ5"#-&41"$&Λࢦఆ Ͱ͖ΔΑ͏ʹରԠͨ͠<> w SBJMTECTDIFNBMPBEͷϚϧνΠϯ αʔτʹରԠͨ͠<> w 3VCZ0$*Λ3VCZͷ #JH%FDJNBMରԠ<SVCZPDJ> ͡ΊͯͷΞμϓλύον
rsim/oracle-enhanced#1028
w 0SBDMFͰ5"#-&41"$&Ͱςʔϒϧ ΠϯσοΫεͷอଘྖҬࢦఆ͕Ͱ͖Δ w 0SBDMFFOBIBODFEBEBQUFSͰ EFGBVMU@UBCMFTQBDFTͰࢦఆՄೳ w QSJNBSZLFZʹରͯ͠͏·͘ޮ͔ͳ ͔ͬͨͷͰͨ͠ 5"#-&41"$&ͷࢦఆ
w ࣌ࣗ৴͕ͳ͘*TTVFͰ͓͍ खݩʹϞϯΩʔύον͋ͬͨ
w 54@*/%&9Ͱͳ͘54@%"5"ʹೖͬͯͨ ͷमਖ਼ύον 0QFOB13
"3.JHSBUJPOͷDSBFUF@UBCMFͷ SEQBSUZΞμϓλ࣮ͷมߋ தུ Ճ IUUQTHJUIVCDPNSTJNPSBDMFFOIBODFECMPCWSDMJCBDUJWF@SFDPSEDPOOFDUJPO@BEBQUFSTPSBDMF@FOIBODFETDIFNB@TUBUFNFOUTSC-
w "-5&3*/%&93*-%5"#-&41"$&Λ ࣮ߦ͢ΔϝιουΛఆ͍ٛͯ͠Δ ADSFBUF@UBCMFA͔ΒͷϑοΫ
w ϦϙδτϦΛԣஅͨ͠มߋ͕ඞཁͩͬͨ $*͕ͱ͓Βͳ͍
w 64&34Ͱͳ͘4:45&.ʹอଘ͞Εͯͨ w %&'"6-55"#-&41"$&ͷมߋ w 0SBDMF͚ͷSBJMTEFWCPYͷ13 ZBIPOEBSBJMTEFWCPY
w 3%#.4ͷΞμϓλ։ൃͳͷͰ 3%#.4ʹԠͨ͡։ൃڥΛඋ͢Δ ඞཁ͕͋Δ w ZBIPOEBSBJMTEFWCPY͕ 0SBDMF͚ͷ։ൃڥͱͳΔ w $*ͱ߹Θͤͯ͜ͷڥΛ͏ͷ͕ྑ͍ ։ൃڥͷݟΛಘΔ
Oracle with Rails 6.0
w 3BJMTҎલϓϥΠϚϦΩʔ*%ͷ ࠾൪ʹ͍ͭͯ4&26&/$&Ͱ͍ग़͞ Ε͍ͯΔ w 3BJMTҎ߱0SBDMFDͷ *EFOUJUZ$PMVNOΛ͏ํͰݕ౼ w OFYUWBMͱ͍͏1P$ͷϦϒʔτ 1P$*EFOUJUZ
w 3BJMTҎલͷσϑΥϧτ EFGBVMU@TFRVFODF@TUBSU@WBMVF w 3BJMTҎޙͷσϑΥϧτ EFGBVMU@TFRVFODF@TUBSU@WBMVF ʹͳΓଞͷΞμϓλͱಉ͡ڍಈʹ $IBOHFAEFGBVMU@TFRVFODF@TUBSU@WBMVFA GSPNUP
w SBJMTECTUSVDUVSFEVNQͷࡍ ʹσϑΥϧτͰ7*&8͕μϯϓ͞Ε ΔΑ͏ʹͳΔ &YUSBDUWJFXTUPEC TUSVDUVSFTRMCZEFGBVMU
w 0SBDMF%"5"#"4&-*/,ͱ͍͏ ଞͷ%#ͷσʔλΛҾ͘ػߏ͕͋Γ 3BJMTܥ0SBDMFΞμϓλἬαϙʔτ w 3BJMTҎޙ3BJMTͷෳ%#ର ԠʹͤΔ͜ͱʹͳΓػೳআ͢Δํ SBJMTSBJMTࢀর %SPQEBUBCBTFMJOLTVQQPSU
%SPQEBUBCBTFMJOLTVQQPSU
w "3#BTFDPOOFDUJPOUBCMFTͷ ΓʹؚΊͯΔϚςϏϡʔΛ֎͠ςʔ ϒϧͷΈฦ͢Α͏ʹ͢Δ͔Ͳ͏͔ʁ w 1PTUHSF42-Ξμϓλʹ͓͚Δಉϝ ιου͕ϚςϏϡʔΛฦ͔͢Ͳ͏͔ʹ ΑΔ (JU)VCίϝϯτௐ &YDMVEFANBUFSJBMJ[FE@WJFXTA
GSPNAUBCMFTA
w 0SBDMFD3ҎԼͰΧϥϜ໊ͳ ͲࣝผࢠʹόΠτҎԼͷ੍ݶ͕͋Δ w SBJMTSBJMTͷ"3ͷҰ෦ͷςετ͕ 0SBDMFͰམͪΔ͍ͪཁҼͰ͋Δ w 0SBDMFD3Ҏ্όΠτ ·Ͱͷ֦ு͞ΕΔ͚ͲͲ͏͢Δʁ -POHJEFOUJpFSTTVQQPSU
+3VCZ +%#$TVQQPSUT0SBDMFD PSIJHIFS1%# 1MVHHBCMFEBUBCBTF
Oracle enhanced 6.0 may require Oracle 12c or higher
w ਓྨͰݟ͍ͯΔਓ͕ݶΒΕ͍ͯΔͱ͍͏ $POOFDUJPO"EBQUFSTͷׂͱߏͱ ϦϙδτϦͰͷॴʹ͍ͭͯ͠·ͨ͠ w "SFMपล͍͠ͷͰׂѪ͍ͯ͠·͕͢ɺ ͜ͷ͋ͨΓ৮ΕΔͱ͔ͳΓڧ͍ͱࢥ͍·͢ w LBNJQP͞ΜͱZBIPOEB͞Μ͍͢͝ਓ ͓ΘΓʹ
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