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Chris T

2006-May-17 22:15 UTC

[Rails] Help mixin in class methods

Starting to feel more confident and code is DRYing up nicely, but I''ve 
hit a brick wall here and hoping someone can help me.

I''ve got a module, TrustRanking, which extends a number of
model''s
instance methods, and I want to extend their class methods too, but I 
can seem to work out how to do it.

Simply including the module from the class works a treat for the 
instance methods, but not for the class methods. I''ve tried a whole 
bunch of things, putting the instance methods and class methods in 
different submodules and calling them separately (and differently -- is 
it extend for the class methods?). Is anyone able to point me in the 
right direction. Have tried looking at  a couple of plug-ins 
(acts_as_taggable), but it''s not helping. Maybe I''m just
tired.. or dense.

Tx

Ross Dawson

2006-May-18 02:12 UTC

head link

[Rails] Help mixin in class methods

Saw this http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/35979 

so 

module Foo
  module ClassMethods
    def bar
      puts ''hello from class method bar''
    end
  end

  include ClassMethods

  def self.append_features(klass)
    super
    klass.extend(ClassMethods)
  end
end

class FooBar
  include Foo
end

FooBar.bar
>hello from class method bar
HTH

Ross
> -----Original Message-----
> From: rails-bounces@lists.rubyonrails.org
> [mailto:rails-bounces@lists.rubyonrails.org]On Behalf Of Chris T
> Sent: Thursday, 18 May 2006 8:16 AM
> To: rails@lists.rubyonrails.org
> Subject: [Rails] Help mixin in class methods
> 
> 
> Starting to feel more confident and code is DRYing up nicely, 
> but I''ve 
> hit a brick wall here and hoping someone can help me.
> 
> I''ve got a module, TrustRanking, which extends a number of
model''s
> instance methods, and I want to extend their class methods too, but I 
> can seem to work out how to do it.
> 
> Simply including the module from the class works a treat for the 
> instance methods, but not for the class methods. I''ve tried a
whole
> bunch of things, putting the instance methods and class methods in 
> different submodules and calling them separately (and 
> differently -- is 
> it extend for the class methods?). Is anyone able to point me in the 
> right direction. Have tried looking at  a couple of plug-ins 
> (acts_as_taggable), but it''s not helping. Maybe I''m just 
> tired.. or dense.
> 
> Tx
>  
> _______________________________________________
> Rails mailing list
> Rails@lists.rubyonrails.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
>

Chris T

2006-May-18 15:22 UTC

head link

[Rails] Help mixin in class methods

Thanks for this. Couldn''t make it work, but it gave me the energy to 
give it another go, and with the help of the Pickaxe, managed to make it 
work.

What I did (in case anyone else needs it) is split the module into two 
submodules, then include the submodule containing the instance methods, 
and extend [the class with] the one containing the class methods. So it 
looked like this:
[lib/trust_ranking.rb]
module TrustRanking
    module ClassMethods
        def shinynewclassmethod
            # stuff here
       end

       #more methods
    end

    module InstanceMethods
        def shinynewinstancemethod
            # stuff here
       end

       #more methods
    end
end

class User < ActiveRecord::Base
  include TrustRanking::InstanceMethods
  extend TrustRanking::ClassMethods
#
end

Thanks again for your help.
Chris

Ross Dawson wrote:> Saw this http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/35979 
>
> so 
>
> module Foo
>   module ClassMethods
>     def bar
>       puts ''hello from class method bar''
>     end
>   end
>
>   include ClassMethods
>
>   def self.append_features(klass)
>     super
>     klass.extend(ClassMethods)
>   end
> end
>
> class FooBar
>   include Foo
> end
>
> FooBar.bar
>
>   
>> hello from class method bar
>>     
>
> HTH
>
> Ross
>
>   
>> -----Original Message-----
>> From: rails-bounces@lists.rubyonrails.org
>> [mailto:rails-bounces@lists.rubyonrails.org]On Behalf Of Chris T
>> Sent: Thursday, 18 May 2006 8:16 AM
>> To: rails@lists.rubyonrails.org
>> Subject: [Rails] Help mixin in class methods
>>
>>
>> Starting to feel more confident and code is DRYing up nicely, 
>> but I''ve 
>> hit a brick wall here and hoping someone can help me.
>>
>> I''ve got a module, TrustRanking, which extends a number of
model''s
>> instance methods, and I want to extend their class methods too, but I 
>> can seem to work out how to do it.
>>
>> Simply including the module from the class works a treat for the 
>> instance methods, but not for the class methods. I''ve tried a
whole
>> bunch of things, putting the instance methods and class methods in 
>> different submodules and calling them separately (and 
>> differently -- is 
>> it extend for the class methods?). Is anyone able to point me in the 
>> right direction. Have tried looking at  a couple of plug-ins 
>> (acts_as_taggable), but it''s not helping. Maybe I''m
just
>> tired.. or dense.
>>
>> Tx
>>  
>> _______________________________________________
>> Rails mailing list
>> Rails@lists.rubyonrails.org
>> http://lists.rubyonrails.org/mailman/listinfo/rails
>>
>>     
> _______________________________________________
> Rails mailing list
> Rails@lists.rubyonrails.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
>
>

Jim mack

2006-Jun-22 01:32 UTC

head link

[Rails] Help mixin in class methods

I get "uninitialized constant ClassMethods" when I try this:

require "sort_order"

class Player < ActiveRecord::Base
  include SortOrder::ClassMethods
  tester
end

module SortOrder
  module ClassMethods
    def tester
      @test = 2
    end
  end

  module InstanceMethods
    def testers
      @test = 35
    end
  end
end

C:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:123:in
`const_missing''
#{RAILS_ROOT}/app/models/player.rb:5
#{RAILS_ROOT}/app/controllers/players_controller.rb:13:in `list''
-e:4

C:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:123:in
`const_missing''
C:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:140:in
`load''
C:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:56:in
`require_or_load''
C:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:30:in
`depend_on''
C:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:85:in
`require_dependency''
C:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:98:in
`const_missing''
C:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:131:in
`const_missing''
C:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/inflector.rb:161:in
`constantize''
C:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/core_ext/string/inflections.rb:59:in
`constantize''
C:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/pagination.rb:194:in
`paginator_and_collection_for''
C:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/pagination.rb:129:in
`paginate''
C:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/base.rb:910:in
`perform_action_without_filters''
C:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/filters.rb:368:in
`perform_action_without_benchmark''
C:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/benchmarking.rb:69:in
`perform_action_without_rescue''
C:/ruby/lib/ruby/1.8/benchmark.rb:293:in `measure''
C:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/benchmarking.rb:69:in
`perform_action_without_rescue''
C:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/rescue.rb:82:in
`perform_action''
C:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/base.rb:381:in
`process_without_filters''
C:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/filters.rb:377:in
`process_without_session_management_support''
C:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/session_management.rb:117:in
`process''
C:/ruby/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/dispatcher.rb:38:in
`dispatch''
C:/ruby/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/webrick_server.rb:115:in
`handle_dispatch''
C:/ruby/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/webrick_server.rb:81:in
`service''
C:/ruby/lib/ruby/1.8/webrick/httpserver.rb:104:in `service''
C:/ruby/lib/ruby/1.8/webrick/httpserver.rb:65:in `run''
C:/ruby/lib/ruby/1.8/webrick/server.rb:173:in `start_thread''
C:/ruby/lib/ruby/1.8/webrick/server.rb:162:in `start_thread''
C:/ruby/lib/ruby/1.8/webrick/server.rb:95:in `start''
C:/ruby/lib/ruby/1.8/webrick/server.rb:92:in `start''
C:/ruby/lib/ruby/1.8/webrick/server.rb:23:in `start''
C:/ruby/lib/ruby/1.8/webrick/server.rb:82:in `start''
C:/ruby/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/webrick_server.rb:67:in
`dispatch''
C:/ruby/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/commands/servers/webrick.rb:59
C:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:21:in
`require''
C:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:147:in
`require''
C:/ruby/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/commands/server.rb:30
C:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:21:in
`require''
C:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:147:in
`require''
script/server:3

C:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:123:in
`const_missing''
#{RAILS_ROOT}/app/models/player.rb:5
C:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:140:in
`load''
C:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:56:in
`require_or_load''
C:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:30:in
`depend_on''
C:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:85:in
`require_dependency''
C:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:98:in
`const_missing''
C:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:131:in
`const_missing''
C:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/inflector.rb:161:in
`constantize''
C:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/core_ext/string/inflections.rb:59:in
`constantize''
C:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/pagination.rb:194:in
`paginator_and_collection_for''
C:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/pagination.rb:129:in
`paginate''
#{RAILS_ROOT}/app/controllers/players_controller.rb:13:in `list''
C:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/base.rb:910:in
`perform_action_without_filters''
C:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/filters.rb:368:in
`perform_action_without_benchmark''
C:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/benchmarking.rb:69:in
`perform_action_without_rescue''
C:/ruby/lib/ruby/1.8/benchmark.rb:293:in `measure''
C:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/benchmarking.rb:69:in
`perform_action_without_rescue''
C:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/rescue.rb:82:in
`perform_action''
C:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/base.rb:381:in
`process_without_filters''
C:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/filters.rb:377:in
`process_without_session_management_support''
C:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.1/lib/action_controller/session_management.rb:117:in
`process''
C:/ruby/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/dispatcher.rb:38:in
`dispatch''
C:/ruby/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/webrick_server.rb:115:in
`handle_dispatch''
C:/ruby/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/webrick_server.rb:81:in
`service''
C:/ruby/lib/ruby/1.8/webrick/httpserver.rb:104:in `service''
C:/ruby/lib/ruby/1.8/webrick/httpserver.rb:65:in `run''
C:/ruby/lib/ruby/1.8/webrick/server.rb:173:in `start_thread''
C:/ruby/lib/ruby/1.8/webrick/server.rb:162:in `start_thread''
C:/ruby/lib/ruby/1.8/webrick/server.rb:95:in `start''
C:/ruby/lib/ruby/1.8/webrick/server.rb:92:in `start''
C:/ruby/lib/ruby/1.8/webrick/server.rb:23:in `start''
C:/ruby/lib/ruby/1.8/webrick/server.rb:82:in `start''
C:/ruby/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/webrick_server.rb:67:in
`dispatch''
C:/ruby/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/commands/servers/webrick.rb:59
C:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:21:in
`require''
C:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:147:in
`require''
C:/ruby/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/commands/server.rb:30
C:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:21:in
`require''
C:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:147:in
`require''
script/server:3
-e:4

This error occured while loading the following files:
   player.rb
   sort_order/class_methods.rb

So, why does it try for a secondary file?



On 5/18/06, Chris T <ctmailinglists@googlemail.com>
wrote:>
> Thanks for this. Couldn''t make it work, but it gave me the energy
to
> give it another go, and with the help of the Pickaxe, managed to make it
> work.
>
> What I did (in case anyone else needs it) is split the module into two
> submodules, then include the submodule containing the instance methods,
> and extend [the class with] the one containing the class methods. So it
> looked like this:
> [lib/trust_ranking.rb]
> module TrustRanking
>     module ClassMethods
>         def shinynewclassmethod
>             # stuff here
>        end
>
>        #more methods
>     end
>
>     module InstanceMethods
>         def shinynewinstancemethod
>             # stuff here
>        end
>
>        #more methods
>     end
> end
>
> class User < ActiveRecord::Base
>   include TrustRanking::InstanceMethods
>   extend TrustRanking::ClassMethods
> #
> end
>
> Thanks again for your help.
> Chris
>
> Ross Dawson wrote:
> > Saw this
> http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/35979
> >
> > so
> >
> > module Foo
> >   module ClassMethods
> >     def bar
> >       puts ''hello from class method bar''
> >     end
> >   end
> >
> >   include ClassMethods
> >
> >   def self.append_features(klass)
> >     super
> >     klass.extend(ClassMethods)
> >   end
> > end
> >
> > class FooBar
> >   include Foo
> > end
> >
> > FooBar.bar
> >
> >
> >> hello from class method bar
> >>
> >
> > HTH
> >
> > Ross
> >
> >
> >> -----Original Message-----
> >> From: rails-bounces@lists.rubyonrails.org
> >> [mailto:rails-bounces@lists.rubyonrails.org]On Behalf Of Chris T
> >> Sent: Thursday, 18 May 2006 8:16 AM
> >> To: rails@lists.rubyonrails.org
> >> Subject: [Rails] Help mixin in class methods
> >>
> >>
> >> Starting to feel more confident and code is DRYing up nicely,
> >> but I''ve
> >> hit a brick wall here and hoping someone can help me.
> >>
> >> I''ve got a module, TrustRanking, which extends a number
of model''s
> >> instance methods, and I want to extend their class methods too,
but I
> >> can seem to work out how to do it.
> >>
> >> Simply including the module from the class works a treat for the
> >> instance methods, but not for the class methods. I''ve
tried a whole
> >> bunch of things, putting the instance methods and class methods in
> >> different submodules and calling them separately (and
> >> differently -- is
> >> it extend for the class methods?). Is anyone able to point me in
the
> >> right direction. Have tried looking at  a couple of plug-ins
> >> (acts_as_taggable), but it''s not helping. Maybe
I''m just
> >> tired.. or dense.
> >>
> >> Tx
> >>
> >> _______________________________________________
> >> Rails mailing list
> >> Rails@lists.rubyonrails.org
> >> http://lists.rubyonrails.org/mailman/listinfo/rails
> >>
> >>
> > _______________________________________________
> > Rails mailing list
> > Rails@lists.rubyonrails.org
> > http://lists.rubyonrails.org/mailman/listinfo/rails
> >
> >
>
> _______________________________________________
> Rails mailing list
> Rails@lists.rubyonrails.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
>


-- 
Jim
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