extend ActiveSupport::Concernの魔術を理解する

Transcript

1. FYUFOE
   "DUJWF4VQQPSU$PODFSO
   ͷຐज़Λཧղ͢Δ ग़యɿ
   IUUQTXXXBNB[PODPKQϝλϓϩάϥϛϯά3VCZୈ൛1BPMP1FSSPUUBEQ
   IUUQRJJUBDPN
   IUUQHJUIVCDPKQ !ZVLJIJSPQ

2. TFMG͕ԿΛ͔ࣔ͢ʁ
   CBTF͕ԿΛ͔ࣔ͢ʁ
   Λߟ͑ͳ͕ΒಡΉͱཧղ͕ૣ͍Ͱ͢ɻ ΋͔ͨ͠͠Βؒҧ͍͕͋Δ͔΋Ͱ͢ɻ
   ͔͋͠Βͣɻ ग़యɿIUUQXXXXFCMJPKQDPOUFOUҰൠ஫ҙ

3. "DUJWF4VQQPSU$PODFSOϞδϡʔϧ module ActiveSupport module Concern class MultipleIncludedBlocks < StandardError #:nodoc:

   def initialize super "Cannot define multiple 'included' blocks for a Concern" end end def self.extended(base) #:nodoc: base.instance_variable_set(:@_dependencies, []) end def append_features(base) if base.instance_variable_defined?(:@_dependencies) base.instance_variable_get(:@_dependencies) << self return false else return false if base < self @_dependencies.each { |dep| base.send(:include, dep) } super base.extend const_get(:ClassMethods) if const_defined?(:ClassMethods) base.class_eval(&@_included_block) if instance_variable_defined?(:@_included_block) end end def included(base = nil, &block) if base.nil? raise MultipleIncludedBlocks if instance_variable_defined?(:@_included_block) @_included_block = block else super end end end end

4. module ActiveSupport module Concern class MultipleIncludedBlocks < StandardError #:nodoc: def

   initialize super "Cannot define multiple 'included' blocks for a Concern" end end def self.extended(base) #:nodoc: base.instance_variable_set(:@_dependencies, []) end def append_features(base) if base.instance_variable_defined?(:@_dependencies) base.instance_variable_get(:@_dependencies) << self return false else return false if base < self @_dependencies.each { |dep| base.send(:include, dep) } super base.extend const_get(:ClassMethods) if const_defined?(:ClassMethods) base.class_eval(&@_included_block) if instance_variable_defined?(:@_included_block) end end def included(base = nil, &block) if base.nil? raise MultipleIncludedBlocks if instance_variable_defined?(:@_included_block) @_included_block = block else super end end end end ϙΠϯτ͸ͭ "DUJWF4VQQPSU$PODFSOΛFYUFOEͨ͠ ޙɺ.ϞδϡʔϧͷΠϯελϯεม਺ʹɺ
   !@EFQFOEFODJFT
   
   <>
   ͕อ࣋͞ΕΔɻ
   TFMG
   
   
   
   "DUJWF4VQQPSU$PODFSO
   CBTF
   
   . module M extend ActiveSupport::Concern end  FYUFOEͨ͠Ϟδϡʔϧ͸Πϯελϯεม਺!@EFQFODEFDJFTΛอ࣋ .Ϟδϡʔϧ . !@EFQFOEFODJFT<>

5. module ActiveSupport module Concern class MultipleIncludedBlocks < StandardError #:nodoc: def

   initialize super "Cannot define multiple 'included' blocks for a Concern" end end def self.extended(base) #:nodoc: base.instance_variable_set(:@_dependencies, []) end def append_features(base) … end def included(base = nil, &block) … end end end ϙΠϯτ͸ͭ  FYUFOEͨ͠Ϟδϡʔϧ͸Ϋϥε֦ுʹΑΓɺ "DUJWF4VQQPSU$PODFSOϞδϡʔϧʹॴଐ͍ͯ͠Δ
   BQQFOE@GFBUVSFTͱJODMVEFEΛΫϥεɾϝιουͰ
   ݺͼग़ͤΔΑ͏ʹͳΔɻ TJOHMFUPO@DMBTT "DUJWF4VQQPSU$PODFSO
   Ϟδϡʔϧ . JODMVEFE BQQFOE@GFBUVSFT BODFTUPST .
   FYUFOE
   "DUJWF4VQQPSU$PODFSO .ಛҟΫϥε ˌ$ JODMVEFE BQQFOE@GFBUVSFT ˒ ˒ ˒Ϋϥε֦ுͷͨΊݺ΂Δ .Ϟδϡʔϧ . !@EFQFOEFODJFT<> module M extend ActiveSupport::Concern end

6. ࢖͍ํɹ ػೳ͸̏ͭ͋Δ Πϯελϯεɾϝιου֦ு Ϋϥεɾϝιου֦ு module M1 extend ActiveSupport::Concern def m1_instance_method;

   end; end module M2 extend ActiveSupport::Concern include M1 def m2_instance_method; end; end module M3 extend ActiveSupport::Concern include M2 def m3_instance_method; end; end module M extend ActiveSupport::Concern include M3 end module M1 extend ActiveSupport::Concern def m1_instance_method; end; module ClassMethods def m1_extend_method; end; end end module M2 extend ActiveSupport::Concern include M1 def m2_instance_method; end; module ClassMethods def m2_extend_method; end; end end module M3 extend ActiveSupport::Concern include M2 def m3_instance_method; end; end module M extend ActiveSupport::Concern include M3 end ·ͣ͸͜͜ͷ
   આ໌Λ͢Δ ϝιου࣮ߦɾ஫ೖ
   JODMVEF͞Εͨޙʹ࣮ߦ module M1 extend ActiveSupport::Concern def m1_instance_method; end; included do def self.method_injected_by_m1; end; end end module M2 extend ActiveSupport::Concern include M1 def m2_instance_method; end; included do def self.method_injected_by_m2; end; end end module M3 extend ActiveSupport::Concern include M2 def m3_instance_method; end; included do self.method_injected_by_m1 self.method_injected_by_m2 end end module M extend ActiveSupport::Concern include M3 end ࣮ࡍʹ࣮ߦ͞ΕΔ FYUFOE
   "DUJWF4VQQPSU$PODFSO
   ͍ͯ͠Δ͔Β࢖͑Δ FYUFOE
   "DUJWF4VQQPSU$PODFSO
   ͍ͯ͠Δ͔Β࢖͑Δ FYUFOE
   "DUJWF4VQQPSU$PODFSO
   ͍ͯ͠Δ͔Β࢖͑Δ

7. ࢖͍ํɹ େ͖̎ͭ͘ͷܕɺ௚ྻܕͱฒྻܕ͕͋Δ ௚ྻܕ ฒྻܕ module M1 extend ActiveSupport::Concern def m1_instance_method;

   end; end module M2 extend ActiveSupport::Concern include M1 def m2_instance_method; end; end module M3 extend ActiveSupport::Concern include M2 def m3_instance_method; end; end module M extend ActiveSupport::Concern include M3 end module M1 extend ActiveSupport::Concern def m1_instance_method; end; end module M2 extend ActiveSupport::Concern include M1 def m2_instance_method; end; end module M3 extend ActiveSupport::Concern include M2 include M1 def m3_instance_method; end; end module M extend ActiveSupport::Concern include M3 end

8. ࢖͍ํɹ େ͖̎ͭ͘ͷܕɺ௚ྻܕͱฒྻܕ͕͋Δ ௚ྻܕ ฒྻܕ .Ϟδϡʔϧ !@EFQFOEFODJFT .Ϟδϡʔϧ !@EFQFOEFODJFT<. .>
   
   JODMVEF͢Δॱ൪Ͱ.BODFTUPSTͷ݁Ռ͕มΘΔ .Ϟδϡʔϧ

   !@EFQFOEFODJFT<> .Ϟδϡʔϧ !@EFQFOEFODJFT<> ٙࣅJODMVEF ٙࣅJODMVEF JODMVEF FY FY FY .Ϟδϡʔϧ !@EFQFOEFODJFT<.> .Ϟδϡʔϧ !@EFQFOEFODJFT .Ϟδϡʔϧ !@EFQFOEFODJFT<.> .Ϟδϡʔϧ !@EFQFOEFODJFT<> ٙࣅJODMVEF ٙࣅJODMVEF JODMVEF FY FY FY "DUJWF4VQQPSU$PODFSOͰFYUFOEͨ͠Ϟδϡʔϧ FY

9. ࢖͍ํɹ ฒྻܕ͸݁ہɺ݁Ռతʹ௚ྻܕʹม׵͞ΕΔ ฒྻܕ ௚ྻܕ .Ϟδϡʔϧ !@EFQFOEFODJFT JODMVEF .Ϟδϡʔϧ !@EFQFOEFODJFT<. .>

   FY .Ϟδϡʔϧ !@EFQFOEFODJFT<> FY .Ϟδϡʔϧ !@EFQFOEFODJFT<> FY .Ϟδϡʔϧ !@EFQFOEFODJFT ٙࣅJODMVEF ٙࣅJODMVEF JODMVEF .Ϟδϡʔϧ !@EFQFOEFODJFT<> FY .Ϟδϡʔϧ !@EFQFOEFODJFT<> FY .Ϟδϡʔϧ !@EFQFOEFODJFT JODMVEF͢Δॱ൪Ͱ.BODFTUPSTͷ݁Ռ͕มΘΔ !@EFQFOEFODJFT<. .>ͷॱ൪ͳΒ
   JODMVEF
   .
   ͷJODMVEFͷํ͕ઌ FY ٙࣅJODMVEF ٙࣅJODMVEF ฒྻ㱺௚ྻม׵ FY "DUJWF4VQQPSU$PODFSOͰFYUFOEͨ͠Ϟδϡʔϧ

10. ࢖͍ํɹ গ͚ͩ͠·ͱΊ ࢖͍ํʹ͸௚ྻܕͱฒྻܕʢෳ߹ܕ΋͋Δʣ͕
    શͯ௚ྻܕʹม׵͞ΕΔͷͰ௚ྻܕͷ࢓૊Έ͚ͩ
    Λཧղ͢Ε͹े෼Ͱ͋Δɻ
    ݟ௨͠ͷྑ͞తʹίʔυΛॻ࣌͘͸جຊɺฒྻܕ
    Ͱॻ͍ͨ΄͏͕ྑ͍Α͏ʹߟ͑Δɻ
    BODFTUPSTΛ௥͍΍͍͢
    આ໌ͷࡍ͸௚ྻܕͷίʔυͷํ͕ਤ͕ॻ͖΍͍͢ͷͰ
    

    ௚ྻܕͰॻ͘ɻ
    ·ͣ͸ɺBQQFOE@GFBUVSFTʹؔͯ͠
    

11. Πϯελϯεɾϝιου֦ு

12. ࢖͍ํ BQQFOE@GFBUVSFTͷجຊͷػೳ͚ͩ࢖͏ʣ௚ྻܕ module M1 extend ActiveSupport::Concern def m1_instance_method; end; end

    module M2 extend ActiveSupport::Concern include M1 def m2_instance_method; end; end module M3 extend ActiveSupport::Concern include M2 def m3_instance_method; end; end module M extend ActiveSupport::Concern include M3 end جຊతͳྲྀΕ͸
    "DUJWF4VQQPSU$PODFSOϞδϡʔϧΛFYUFOEͨ͠.Ϟ δϡʔϧΛ.Ϟδϡʔϧ͕JODMVEF͢Δ͜ͱͰ.Ϟδϡʔϧ ͕Ϋϥε֦ுͰಘͨBQQFOE@GFBUVSFTΛணՐɻ
    ͜ΕΛ܁Γฦ͠࠷ޙɺNPEVMF
    .ʹJODMVEF
    .͞Εͨ࣌ʹɺ ͲͷΑ͏ʹ֤NPEVMF͕JODMVEF͞Ε͍ͯ͘ͷ͔ݟΔɻ
    ݁࿦͸͜͏ͳΔ
    ͜Ε͸Ͳ͏͍͏͜ͱͳͷ͔ͦΕΛཧղ͍͖͍ͯͨ͠ɻ
    include Mˎ extend ActiveSupport::Concern ॱ൪ٯͰ΋ྑ͍ɻ

13. module ActiveSupport module Concern class MultipleIncludedBlocks < StandardError #:nodoc: def

    initialize super "Cannot define multiple 'included' blocks for a Concern" end end def self.extended(base) #:nodoc: base.instance_variable_set(:@_dependencies, []) end def append_features(base) if base.instance_variable_defined?(:@_dependencies) base.instance_variable_get(:@_dependencies) << self return false else return false if base < self @_dependencies.each { |dep| base.send(:include, dep) } super base.extend const_get(:ClassMethods) if const_defined?(:ClassMethods) base.class_eval(&@_included_block) if instance_variable_defined?(:@_included_block) end end def included(base = nil, &block) if base.nil? raise MultipleIncludedBlocks if instance_variable_defined?(:@_included_block) @_included_block = block else super end end end end ͜͜ͷ෦෼ͷػೳΛݟ͍ͯ͘

14. "DUJWF4VQQPSU$PODFSOΛFYUFOEͨ͠ޙɺ.ϞδϡʔϧͷΠϯελ ϯεม਺ʹɺ!@EFQFOEFODJFT
    
    <>͕อ࣋͞ΕΔɻ ActiveSupport::ConcernͷΠϯελϯεɾϝιου͕M1Ϟδϡʔϧ ͷΫϥεɾϝιουʹͳΔɻ(Ϋϥε֦ு) module M1 extend ActiveSupport::Concern def m1_instance_method;

    end; end module M2 extend ActiveSupport::Concern include M1 def m2_instance_method; end; end module M3 extend ActiveSupport::Concern include M2 def m3_instance_method; end; end module M extend ActiveSupport::Concern include M3 end

15. "DUJWF4VQQPSU$PODFSOΛFYUFOEͨ͠ޙɺ.ϞδϡʔϧͷΠϯελ ϯεม਺ʹɺ!@EFQFOEFODJFT
    
    <>͕อ࣋͞ΕΔɻ "DUJWF4VQQPSU$PODFSOͷΠϯελϯεɾϝιου͕.Ϟδϡʔϧͷ ΫϥεɾϝιουʹͳΔɻ Ϋϥε֦ு module M1 extend ActiveSupport::Concern def

    m1_instance_method; end; end module M2 extend ActiveSupport::Concern include M1 def m2_instance_method; end; end module M3 extend ActiveSupport::Concern include M2 def m3_instance_method; end; end module M extend ActiveSupport::Concern include M3 end

16. module M1 extend ActiveSupport::Concern def m1_instance_method; end; end module M2

    extend ActiveSupport::Concern include M1 def m2_instance_method; end; end module M3 extend ActiveSupport::Concern include M2 def m3_instance_method; end; end module M extend ActiveSupport::Concern include M3 end JODMVEF
    .Λ͢Δͱɺ.BQQFOE@GFBUVSFT . ͕ணՐɻ
    .Ϟδϡʔϧ͸!@EFQFOEFODJFT͕ఆٛ͞Ε͍ͯΔ͔Βͦ͜ʹ.Φϒ δΣΫτΛ֨ೲ

17. module M1 extend ActiveSupport::Concern def m1_instance_method; end; end module M2

    extend ActiveSupport::Concern include M1 def m2_instance_method; end; end module M3 extend ActiveSupport::Concern include M2 def m3_instance_method; end; end module M extend ActiveSupport::Concern include M3 end "DUJWF4VQQPSU$PODFSOΛFYUFOEͨ͠ޙɺ.ϞδϡʔϧͷΠϯελ ϯεม਺ʹɺ!@EFQFOEFODJFT
    
    <>͕อ࣋͞ΕΔɻ "DUJWF4VQQPSU$PODFSOͷΠϯελϯεɾϝιου͕.Ϟδϡʔϧͷ ΫϥεɾϝιουʹͳΔɻ Ϋϥε֦ு

18. module M1 extend ActiveSupport::Concern def m1_instance_method; end; end module M2

    extend ActiveSupport::Concern include M1 def m2_instance_method; end; end module M3 extend ActiveSupport::Concern include M2 def m3_instance_method; end; end module M extend ActiveSupport::Concern include M3 end .Ϟδϡʔϧ͕JODMVEF
    .Λ͢Δͱɺ.BQQFOE@GFBUVSFT . ͕ ணՐɻ.Ϟδϡʔϧ͸!@EFQFOEFODJFT͕ఆٛ͞Ε͍ͯΔ͔Β
    ͦ͜ʹ.ΦϒδΣΫτΛ֨ೲ .Ϟδϡʔϧ͕JODMVEF
    .Λ͢Δͱɺ.BQQFOE@GFBUVSFT . ͕ ணՐɻ.Ϟδϡʔϧ͸!@EFQFOEFODJFT͕ఆٛ͞Ε͍ͯΔ͔Β
    ͦ͜ʹ.ΦϒδΣΫτΛ֨ೲ ௚ྻܕ

19. module ActiveSupport module Concern class MultipleIncludedBlocks < StandardError #:nodoc: def

    initialize super "Cannot define multiple 'included' blocks for a Concern" end end def self.extended(base) #:nodoc: base.instance_variable_set(:@_dependencies, []) end def append_features(base) if base.instance_variable_defined?(:@_dependencies) base.instance_variable_get(:@_dependencies) << self return false else return false if base < self @_dependencies.each { |dep| base.send(:include, dep) } super base.extend const_get(:ClassMethods) if const_defined?(:ClassMethods) base.class_eval(&@_included_block) if instance_variable_defined?(:@_included_block) end end def included(base = nil, &block) if base.nil? raise MultipleIncludedBlocks if instance_variable_defined?(:@_included_block) @_included_block = block else super end end end end ͜͜ͷ෦෼ͷػೳΛݟ͍ͯ͘

20. module M1 extend ActiveSupport::Concern def m1_instance_method; end; end module M2

    extend ActiveSupport::Concern include M1 def m2_instance_method; end; end module M3 extend ActiveSupport::Concern include M2 def m3_instance_method; end; end module M extend ActiveSupport::Concern include M3 end .Ϟδϡʔϧ͕JODMVEF
    .Λ͢Δͱɺ.BQQFOE@GFBUVSFT . ͕ணՐɻ.Ϟ δϡʔϧ͸!@EFQFOEFODJFT͕ఆٛ͞Ε͍ͯͳ͍͔Β
    . TFMG ͷ!@EFQFOEFODJFT<.>ʹରͯ͠ɺJODMVEF
    .͕CBTF . ʹରͯ͠ ݺ͹ΕΔɻͭ·Γɺ.BQQFOE@GFBUVSFT . ͕ணՐ͢ΔɻҎԼɺ܁Γฦ͠
    ௚ྻܕ  .Ϟδϡʔϧ͕JODMVEF
    .̎Λ͢Δͱɺ.̎BQQFOE@GFBUVSFT . ͕ணՐɻ.Ϟ δϡʔϧ͸!@EFQFOEFODJFT͕ఆٛ͞Ε͍ͯͳ͍͔Β
    . TFMG ͷ!@EFQFOEFODJFT<.>ʹରͯ͠ɺJODMVEF
    .͕CBTF . ʹରͯ͠ ݺ͹ΕΔɻͭ·Γɺ.BQQFOE@GFBUVSFT . ͕ணՐ͢ΔɻҎԼɺ܁Γฦ͠
    .Ϟδϡʔϧ͕JODMVEF
    .Λ͢Δͱɺ.BQQFOE@GFBUVSFT . ͕ணՐɻ.Ϟ
    ɾɾɾɾ
    ɾɾɾɾ

21. module M1 extend ActiveSupport::Concern def m1_instance_method; end; end module M2

    extend ActiveSupport::Concern include M1 def m2_instance_method; end; end module M3 extend ActiveSupport::Concern include M2 def m3_instance_method; end; end module M extend ActiveSupport::Concern include M3 end ௚ྻܕ  NϞδϡʔϧ
    ͔Βࢀরͨ࣌͠
    ͚ͩBODFTUPST ݁࿦͸.Ϟδϡʔϧʹ.ɾ.ɾ.͕JODMVEF͞ΕΔ͕ɺ
    ͱͳΔɻ

22. ·ͱΊ BQQFOE@GFBUVSFTͷجຊͷػೳ͚ͩ࢖͏ʣ௚ྻܕ module M1 extend ActiveSupport::Concern def m1_instance_method; end; end

    module M2 extend ActiveSupport::Concern include M1 def m2_instance_method; end; end module M3 extend ActiveSupport::Concern include M2 def m3_instance_method; end; end module M extend ActiveSupport::Concern include M3 end FYUFOE
    "DUJWF4VQQPSU$PODFSO
    ͕ͳ͞ΕͨNPEVMFͷ
    JODMVEFΛޙճ͠ʹͰ͖ΔɻӈͷྫͳΒ
    FYUFOE
    "DUJWF4VQQPSU$PODFSO
    ͕ͳ͞ΕͨNPEVMFͷ
    JODMVEFΛޙճ͠ʹͰ͖ΔͨΊɺதؒNPEVMF .ɾ.ͳͲ ͰͷJODMVEF͕ൃੜͤͣɺΦʔόʔϔου͕ආ͚ΒΕΔɻ ݁࿦ ௕ॴ ୹ॴ

23. Ϋϥεɾϝιου֦ு

24. ࢖͍ํ $MBTT.FUIPETͷػೳͷ෦෼Λ࢖͏ʣ௚ྻܕ module M1 extend ActiveSupport::Concern def m1_instance_method; end; module

    ClassMethods def m1_extend_method; end; end end module M2 extend ActiveSupport::Concern include M1 def m2_instance_method; end; module ClassMethods def m2_extend_method; end; end end module M3 extend ActiveSupport::Concern include M2 def m3_instance_method; end; end module M extend ActiveSupport::Concern include M3 end جຊతͳྲྀΕ͸
    "DUJWF4VQQPSU$PODFSOϞδϡʔϧΛFYUFOEͨ͠.Ϟ δϡʔϧΛ.Ϟδϡʔϧ͕JODMVEF͢Δ͜ͱͰ.Ϟδϡʔϧ ͕Ϋϥε֦ுͰಘͨBQQFOE@GFBUVSFTΛணՐɻ
    ͜ΕΛ܁Γฦ͠࠷ޙɺNPEVMF
    .ʹJODMVEF
    .͞Εͨ࣌ʹɺ ͲͷΑ͏ʹ֤NPEVMF͕JODMVEF͞Ε͍ͯ͘ͷ͔ݟΔɻ
    ݁࿦͸͜͏ͳΔ
    ͜Ε͸Ͳ͏͍͏͜ͱͳͷ͔ͦΕΛཧղ͍͖͍ͯͨ͠ɻ

25. module ActiveSupport module Concern class MultipleIncludedBlocks < StandardError #:nodoc: def

    initialize super "Cannot define multiple 'included' blocks for a Concern" end end def self.extended(base) #:nodoc: base.instance_variable_set(:@_dependencies, []) end def append_features(base) if base.instance_variable_defined?(:@_dependencies) base.instance_variable_get(:@_dependencies) << self return false else return false if base < self @_dependencies.each { |dep| base.send(:include, dep) } super base.extend const_get(:ClassMethods) if const_defined?(:ClassMethods) base.class_eval(&@_included_block) if instance_variable_defined?(:@_included_block) end end def included(base = nil, &block) if base.nil? raise MultipleIncludedBlocks if instance_variable_defined?(:@_included_block) @_included_block = block else super end end end end ͜͜ͷ෦෼ͷػೳΛݟ͍ͯ͘

26. module M1 extend ActiveSupport::Concern def m1_instance_method; end; module ClassMethods def

    m1_extend_method; end; end end module M2 extend ActiveSupport::Concern include M1 def m2_instance_method; end; module ClassMethods def m2_extend_method; end; end end module M3 extend ActiveSupport::Concern include M2 def m3_instance_method; end; end module M extend ActiveSupport::Concern include M3 end ௚ྻܕ .Ϟδϡʔϧ͕JODMVEF
    .Λ͢Δͱɺ.BQQFOE@GFBUVSFT . ͕ணՐɻ.Ϟ δϡʔϧ͸!@EFQFOEFODJFT͕ఆٛ͞Ε͍ͯͳ͍͔Β
    . TFMG ͷ!@EFQFOEFODJFT<.>ʹରͯ͠ɺ. CBTF
    FYUFOE
    .͕࣮ߦ͞ΕΔɻ ҎԼɺ܁Γฦ͠
    .Ϟδϡʔϧ͕JODMVEF
    .̎Λ͢Δͱɺ.̎BQQFOE@GFBUVSFT . ͕ணՐɻ.Ϟ δϡʔϧ͸!@EFQFOEFODJFT͕ఆٛ͞Ε͍ͯͳ͍͔Β
    . TFMG ͷ!@EFQFOEFODJFT<.>ʹରͯ͠ɺ. CBTF
    FYUFOE
    .͕࣮ߦ͞ΕΔɻ ҎԼɺ܁Γฦ͠
    .Ϟδϡʔϧ͕JODMVEF
    .Λ͢Δͱɺ .BQQFOE@GFBUVSFT . ͕ணՐɻ.Ϟ
    ɾɾɾɾ
    ɾɾɾɾ
    

27. ·ͱΊ $MBTT.FUIPETͷػೳͷ෦෼Λ࢖͏ʣ௚ྻܕ module M1 extend ActiveSupport::Concern def m1_instance_method; end; module

    ClassMethods def m1_extend_method; end; end end module M2 extend ActiveSupport::Concern include M1 def m2_instance_method; end; module ClassMethods def m2_extend_method; end; end end module M3 extend ActiveSupport::Concern include M2 def m3_instance_method; end; end module M extend ActiveSupport::Concern include M3 end FYUFOE
    "DUJWF4VQQPSU$PODFSO
    ͕ͳ͞ΕͨNPEVMFͷ
    FYUFOEΛޙճ͠ʹͰ͖ΔͨΊɺதؒNPEVMF .ɾ.ͳͲ ͰͷFYUFOE͕ൃੜͤͣɺΦʔόʔϔου͕ආ͚ΒΕΔɻ ௕ॴ ୹ॴ FYUFOE
    "DUJWF4VQQPSU$PODFSO
    ͕ͳ͞ΕͨNPEVMFͷ
    FYUFOEΛޙճ͠ʹͰ͖ΔɻӈͷྫͳΒ
    ݁࿦

28. ϝιου࣮ߦɾ஫ೖ Ͳ͏ͯ͠஫ೖ͔ཧղ͢Δ
    ͦͷNPEVMF͕FYUFOE
    "DUJWF4VQQPSU$PODFSO͍ͯ͠Δ͔Βݺ΂Δ Ϋϥε֦ு

29. module ActiveSupport module Concern class MultipleIncludedBlocks < StandardError #:nodoc: def

    initialize super "Cannot define multiple 'included' blocks for a Concern" end end def self.extended(base) #:nodoc: base.instance_variable_set(:@_dependencies, []) end def append_features(base) if base.instance_variable_defined?(:@_dependencies) base.instance_variable_get(:@_dependencies) << self return false else return false if base < self @_dependencies.each { |dep| base.send(:include, dep) } super base.extend const_get(:ClassMethods) if const_defined?(:ClassMethods) base.class_eval(&@_included_block) if instance_variable_defined?(:@_included_block) end end def included(base = nil, &block) if base.nil? raise MultipleIncludedBlocks if instance_variable_defined?(:@_included_block) @_included_block = block else super end end end end ͜͜ͷ෦෼ͷػೳΛݟ͍ͯ͘ DMBTT@FWBMʹ౉͢CMPDL࣍ୈͰ
    ᶃϝιουΛCBTFʹఆٛͨ͠Γ
    ᶄϝιουΛCBTFͰ࣮ߦͨ͠Γ
    Ͱ͖Δ ϙΠϯτ͸̎ͭ  M.class_eval do def self.method_injected_by_m1; end; end M.class_eval do self.method_injected_by_m2 end Ϋϥεɾϝιου
    NFUIPE@JOKFDUFE@CZ@N
    Λ.ʹఆٛ͢Δ Ϋϥεɾϝιου
    NFUIPE@JOKFDUFE@CZ@N
    Λ.Ͱ࣮ߦ͢Δ

30. module ActiveSupport module Concern class MultipleIncludedBlocks < StandardError #:nodoc: def

    initialize super "Cannot define multiple 'included' blocks for a Concern" end end def self.extended(base) #:nodoc: base.instance_variable_set(:@_dependencies, []) end def append_features(base) if base.instance_variable_defined?(:@_dependencies) base.instance_variable_get(:@_dependencies) << self return false else return false if base < self @_dependencies.each { |dep| base.send(:include, dep) } super base.extend const_get(:ClassMethods) if const_defined?(:ClassMethods) base.class_eval(&@_included_block) if instance_variable_defined?(:@_included_block) end end def included(base = nil, &block) if base.nil? raise MultipleIncludedBlocks if instance_variable_defined?(:@_included_block) @_included_block = block else super end end end end ͜͜ͷ෦෼ͷػೳΛݟ͍ͯ͘ JODMVEFE
    EPʜFOE͸ɺͦΕ͕
    ᶃNPEVMFʹॻ͔Ε͍ͯͨΒɺCBTF͕OJMͰݺ͹ΕΔɻ
    ᶄNPEVMFʹॻ͔Ε͍ͯΔNPEVMFΛJODMVEFͨ͠Βɺ
    CBTF ݺͼग़͠ Ͱݺ͹ΕΔɻ
    ͜ͷ̎ͭͷύλʔϯ͕͋Δɻ͔ͩΒ৚݅෼ذ͍ͯ͠Δɻ ϙΠϯτ͸̎ͭ  ᶃ.ʹॻ͔Ε͍ͯͨΒɺCBTF͕OJMͰݺ͹ΕΔɻ ᶄ.ʹJODMVEFEϒϩοΫ͕ॻ͔Ε͓ͯΓɺͦΕΛ
    ɹJODMVEFͨ͠ΒɺCBTF . Ͱݺ͹ΕΔɻ module M1 extend ActiveSupport::Concern def m1_instance_method; end; included do def self.method_injected_by_m1; end; end end module M2 extend ActiveSupport::Concern include M1 def m2_instance_method; end; included do def self.method_injected_by_m2; end; end end

31. ࢖͍ํ JODMVEFEͷػೳͷ෦෼Λ࢖͏ʣ௚ྻܕ جຊతͳྲྀΕ͸
    "DUJWF4VQQPSU$PODFSOϞδϡʔϧΛFYUFOEͨ͠.Ϟ δϡʔϧΛ.Ϟδϡʔϧ͕JODMVEF͢Δ͜ͱͰ.Ϟδϡʔϧ ͕Ϋϥε֦ுͰಘͨBQQFOE@GFBUVSFTΛணՐɻ
    ͜ΕΛ܁Γฦ͠࠷ޙɺNPEVMF
    .ʹJODMVEF
    .͞Εͨ࣌ʹɺ ͲͷΑ͏ʹ֤NPEVMF͕JODMVEF͞Ε͍ͯ͘ͷ͔ݟΔɻ
    ݁࿦͸͜͏ͳΔ
    ͜Ε͸Ͳ͏͍͏͜ͱͳͷ͔ͦΕΛཧղ͍͖͍ͯͨ͠ɻ

    module M1 extend ActiveSupport::Concern def m1_instance_method; end; included do def self.method_injected_by_m1; end; end end module M2 extend ActiveSupport::Concern include M1 def m2_instance_method; end; included do def self.method_injected_by_m2; end; end end module M3 extend ActiveSupport::Concern include M2 def m3_instance_method; end; ɹincluded do self.method_injected_by_m1 self.method_injected_by_m2 end end module M extend ActiveSupport::Concern include M3 end

32. module M1 extend ActiveSupport::Concern def m1_instance_method; end; included do def

    self.method_injected_by_m1; end; end end module M2 extend ActiveSupport::Concern include M1 def m2_instance_method; end; included do def self.method_injected_by_m2; end; end end module M3 extend ActiveSupport::Concern include M2 def m3_instance_method; end; ɹincluded do self.method_injected_by_m1 self.method_injected_by_m2 end end module M extend ActiveSupport::Concern include M3 end .ϞδϡʔϧʹJODMVEFE
    EPʜFOEϒϩοΫ͕͋ Δ͔ΒɺCBTF OJM Ͱݺͼग़͞ΕΔɻ݁Ռɺ.Ϟ δϡʔϧʹ
    !@JODMVEFE@CMPDL1SPD͕อ࣋͞ΕΔɻ

33. module M1 extend ActiveSupport::Concern def m1_instance_method; end; included do def

    self.method_injected_by_m1; end; end end module M2 extend ActiveSupport::Concern include M1 def m2_instance_method; end; included do def self.method_injected_by_m2; end; end end module M3 extend ActiveSupport::Concern include M2 def m3_instance_method; end; ɹincluded do self.method_injected_by_m1 self.method_injected_by_m2 end end module M extend ActiveSupport::Concern include M3 end ௚ྻܕ .Ϟδϡʔϧʹ.Ϟδϡʔϧ͸࣮ࡍʹJODMVEF
    ͞Εͳ͍ͷͰԿ΋͓͖ͳ͍

34. module M1 extend ActiveSupport::Concern def m1_instance_method; end; included do def

    self.method_injected_by_m1; end; end end module M2 extend ActiveSupport::Concern include M1 def m2_instance_method; end; included do def self.method_injected_by_m2; end; end end module M3 extend ActiveSupport::Concern include M2 def m3_instance_method; end; ɹincluded do self.method_injected_by_m1 self.method_injected_by_m2 end end module M extend ActiveSupport::Concern include M3 end ௚ྻܕ .ϞδϡʔϧʹJODMVEFE
    EPʜFOEϒϩοΫ͕͋ Δ͔ΒɺCBTF OJM Ͱݺͼग़͞ΕΔɻ݁Ռɺ.Ϟ δϡʔϧʹ
    !@JODMVEFE@CMPDL1SPD͕อ࣋͞ΕΔɻ

35. module M1 extend ActiveSupport::Concern def m1_instance_method; end; included do def

    self.method_injected_by_m1; end; end end module M2 extend ActiveSupport::Concern include M1 def m2_instance_method; end; included do def self.method_injected_by_m2; end; end end module M3 extend ActiveSupport::Concern include M2 def m3_instance_method; end; ɹincluded do self.method_injected_by_m1 self.method_injected_by_m2 end end module M extend ActiveSupport::Concern include M3 end ௚ྻܕ .Ϟδϡʔϧʹ.Ϟδϡʔϧ͸࣮ࡍʹJODMVEF
    ͞Εͳ͍ͷͰԿ΋͓͖ͳ͍

36. module M1 extend ActiveSupport::Concern def m1_instance_method; end; included do def

    self.method_injected_by_m1; end; end end module M2 extend ActiveSupport::Concern include M1 def m2_instance_method; end; included do def self.method_injected_by_m2; end; end end module M3 extend ActiveSupport::Concern include M2 def m3_instance_method; end; ɹincluded do self.method_injected_by_m1 self.method_injected_by_m2 end end module M extend ActiveSupport::Concern include M3 end ௚ྻܕ .ϞδϡʔϧʹJODMVEFE
    EPʜFOEϒϩοΫ͕͋ Δ͔ΒɺCBTF OJM Ͱݺͼग़͞ΕΔɻ݁Ռɺ.Ϟ δϡʔϧʹ
    !@JODMVEFE@CMPDL1SPD͕อ࣋͞ΕΔɻ

37. module M1 extend ActiveSupport::Concern def m1_instance_method; end; included do def

    self.method_injected_by_m1; end; end end module M2 extend ActiveSupport::Concern include M1 def m2_instance_method; end; included do def self.method_injected_by_m2; end; end end module M3 extend ActiveSupport::Concern include M2 def m3_instance_method; end; ɹincluded do self.method_injected_by_m1 self.method_injected_by_m2 end end module M extend ActiveSupport::Concern include M3 end ௚ྻܕ M.class_eval do self.method_injected_by_m1 self.method_injected_by_m2 end ͕࣮ߦ͞ΕΔɻ

38. module M1 extend ActiveSupport::Concern def m1_instance_method; end; included do def

    self.method_injected_by_m1; end; end end module M2 extend ActiveSupport::Concern include M1 def m2_instance_method; end; included do def self.method_injected_by_m2; end; end end module M3 extend ActiveSupport::Concern include M2 def m3_instance_method; end; ɹincluded do self.method_injected_by_m1 self.method_injected_by_m2 end end module M extend ActiveSupport::Concern include M3 end ௚ྻܕ M.class_eval do def self.method_injected_by_m2 end end ͕࣮ߦ͞ΕɺMʹΫϥεɾϝιουʹ஫ೖ͞ΕΔ

39. module M1 extend ActiveSupport::Concern def m1_instance_method; end; included do def

    self.method_injected_by_m1; end; end end module M2 extend ActiveSupport::Concern include M1 def m2_instance_method; end; included do def self.method_injected_by_m2; end; end end module M3 extend ActiveSupport::Concern include M2 def m3_instance_method; end; ɹincluded do self.method_injected_by_m1 self.method_injected_by_m2 end end module M extend ActiveSupport::Concern include M3 end ௚ྻܕ M.class_eval do def self.method_injected_by_m2 end end ͕࣮ߦ͞ΕɺMʹΫϥεɾϝιουʹ஫ೖ͞ΕΔ

40. ࢖͍ํ JODMVEFEͷػೳͷ෦෼Λ࢖͏ʣ௚ྻܕ module M1 extend ActiveSupport::Concern def m1_instance_method; end; included

    do def self.method_injected_by_m1; end; end end module M2 extend ActiveSupport::Concern include M1 def m2_instance_method; end; included do def self.method_injected_by_m2; end; end end module M3 extend ActiveSupport::Concern include M2 def m3_instance_method; end; ɹincluded do self.method_injected_by_m1 self.method_injected_by_m2 end end module M extend ActiveSupport::Concern include M3 end FYUFOE
    "DUJWF4VQQPSU$PODFSO
    ͕ͳ͞ΕͨNPEVMFͷ
    FYUFOEΛޙճ͠ʹͰ͖ΔͨΊɺதؒNPEVMF .ɾ.ͳͲ ͰͷFYUFOE͕ൃੜͤͣɺΦʔόʔϔου͕ආ͚ΒΕΔɻ ௕ॴ ୹ॴ ϞδϡʔϧΛJODMVEFͨ࣌͠ʹɺΫϥεɾϝιουΛఆٛͨ͠ Γɺ ݺͼग़ͨ͠Ϟδϡʔϧʹ஫ೖͨ͠Γ ࣮ߦͨ͠ΓͰ͖Δɻ
    ݁࿦

41. ·ͱΊ ͓͞Β͍

42. ࢖͍ํɹ ػೳ͸̏ͭ͋Δ Πϯελϯεɾϝιου֦ு Ϋϥεɾϝιου֦ு module M1 extend ActiveSupport::Concern def m1_instance_method;

    end; end module M2 extend ActiveSupport::Concern include M1 def m2_instance_method; end; end module M3 extend ActiveSupport::Concern include M2 def m3_instance_method; end; end module M extend ActiveSupport::Concern include M3 end module M1 extend ActiveSupport::Concern def m1_instance_method; end; module ClassMethods def m1_extend_method; end; end end module M2 extend ActiveSupport::Concern include M1 def m2_instance_method; end; module ClassMethods def m2_extend_method; end; end end module M3 extend ActiveSupport::Concern include M2 def m3_instance_method; end; end module M extend ActiveSupport::Concern include M3 end ϝιου࣮ߦɾ஫ೖ
    JODMVEF͞Εͨޙʹ࣮ߦ module M1 extend ActiveSupport::Concern def m1_instance_method; end; included do def self.method_injected_by_m1; end; end end module M2 extend ActiveSupport::Concern include M1 def m2_instance_method; end; included do def self.method_injected_by_m2; end; end end module M3 extend ActiveSupport::Concern include M2 def m3_instance_method; end; included do self.method_injected_by_m1 self.method_injected_by_m2 end end module M extend ActiveSupport::Concern include M3 end ࣮ࡍʹ࣮ߦ͞ΕΔ FYUFOE
    "DUJWF4VQQPSU$PODFSO
    ͍ͯ͠Δ͔Β࢖͑Δ FYUFOE
    "DUJWF4VQQPSU$PODFSO
    ͍ͯ͠Δ͔Β࢖͑Δ FYUFOE
    "DUJWF4VQQPSU$PODFSO
    ͍ͯ͠Δ͔Β࢖͑Δ

43. ࢖͍ํɹ େ͖̎ͭ͘ͷܕɺ௚ྻܕͱฒྻܕ͕͋Δ ௚ྻܕ ฒྻܕ module M1 extend ActiveSupport::Concern def m1_instance_method;

    end; end module M2 extend ActiveSupport::Concern include M1 def m2_instance_method; end; end module M3 extend ActiveSupport::Concern include M2 def m3_instance_method; end; end module M extend ActiveSupport::Concern include M3 end module M1 extend ActiveSupport::Concern def m1_instance_method; end; end module M2 extend ActiveSupport::Concern include M1 def m2_instance_method; end; end module M3 extend ActiveSupport::Concern include M2 include M1 def m3_instance_method; end; end module M extend ActiveSupport::Concern include M3 end ॻ࣌͘͸͕͍͍ͬͪ͜

44. ಛ௃ BODFTUPST΍ϝιουͷ৔ॴ Πϯελϯεɾ
    ϝιου֦ு Ϋϥεɾ
    ϝιου֦ு ϝιου࣮ߦɾ஫ೖ
    JODMVEF͞Εͨޙʹ࣮ߦ BODFTUPST ڞ௨

    ڞ௨͠ͳ͍ಛ௃

45. ϝιου໊ ෼ྨ ॴ༗ऀ ݺͼग़͠Մೳ N@JOTUBODF@NFUIPE Πϯελϯεɾϝιου
    ֦ு . .ɾ. N@JOTUBODF@NFUIPE

    Πϯελϯεɾϝιου
    ֦ு . .ɾ. N@JOTUBODF@NFUIPE Πϯελϯεɾϝιου
    ֦ு . .ɾ. N@FYUFOE@NFUIPE Ϋϥεɾϝιου
    ֦ு .$MBTT.FUIPET .TJOHMFUPO@DMBTT
    ɾ.$MBTT.FUIPET N@FYUFOE@NFUIPE Ϋϥεɾϝιου
    ֦ு .$MBTT.FUIPET .TJOHMFUPO@DMBTT
    ɾ.$MBTT.FUIPET NFUIPE@JOKFDUFE@CZ@N ϝιου࣮ߦɾ஫ೖ .TJOHMFUPO@DMBTT . NFUIPE@JOKFDUFE@CZ@N ϝιου࣮ߦɾ஫ೖ .TJOHMFUPO@DMBTT . ಛ௃ BODFTUPST΍ϝιουͷ৔ॴ

46. ɹ͓ർΕ༷Ͱͨ͠ ग़యIUUQQBZCBDLDPN DBU