From: Steve Midgley <public@...>
Date: 2007-02-19T14:21:03+09:00
Subject: Module that includes both class and instance methods?

Hello,

I'm trying to create a module that will have class and instance methods 
that are made available to any object that includes it. I can do the 
job with two lines of code but would prefer to do it with one line of 
code if possible (to make sure no one tries to foolishly use only one 
half of the functionality - it should be all or nothing). Here's what I 
have so far:

[code starts]
module Models
   module Ver
     def Ver.is_versioned(object)
       include Models::VersionsTables::InstanceMethods
       object.extend Models::VersionsTables::ClassMethods
     end
   end
   module VersionsTables
     module InstanceMethods
       def instance_test
         "instance test"
       end
     end
     module ClassMethods
       def class_test
         "class_test"
       end
     end
   end
end


class Live
   Models::Ver::is_versioned(self)
   #include Models::VersionsTables::InstanceMethods
   #extend Models::VersionsTables::ClassMethods
end
puts "::"+Live.class_test
live = Live.new
puts live.instance_test

[code ends]

My code can get the class methods fine - "object.extend" works like a 
charm: I can't figure out what the equivalent is for an instance 
method.

Or perhaps there's a wonderful way to do this using entirely different 
syntax? I'd love to be able to say: "extend Modules::Ver" or something 
like that and have it work - but it seems that no code gets executed 
that's left open in the Ver module when that module is included or 
extended?

Any thoughts or ideas?

Thank you for any help!

Steve
-
The law is an envious monster.
   - Rex Stout