From: 7stud -- <bbxx789_05ss@...>
Date: 2007-11-06T03:29:43+09:00
Subject: Re: Reading a class-file and calling it at runtime.

Miss Elaine Eos wrote:
> In article
> <3736dd30711042349n7225229dw4af74110f2a52048@mail.gmail.com>,
>  sean.ohalpin@gmail.com wrote:
> 
>> only the last call to some_method fails. Have you checked that the
>> name of the class is correct or if you are defining your plugin class
>> within a module?
> 
> I am NOT using "module."  I guess I need to go read-up on modules --
> Thanks!  :)

Maybe you should post a simplified version of one of the files you are 
requiring, e.g.

class Dog
  def speak
    puts "Woof woof"
  end
end


As this example shows:

>Sean O'halpin wrote:
> 
> # ./myplugin.rb
>
> class MyPlugin
>   def some_method
>     puts "Hi from #{self}!"
>   end
> end
> 
>---------------
>
> # test-require-plugin.rb
>
> one_plugin = "myplugin"
> PLUG_IN_DIR = '.'
> plugin_class_name = "MyPlugin"
> 
> require "#{PLUG_IN_DIR}/#{one_plugin}"
> plugin_class = Object.const_get(plugin_class_name).new
> plugin_class.some_method
> 
> # output
> Hi from #<MyPlugin:0xb7c25594>!

...you don't need to have your class inside a module to get your code to 
work.  But the rest of the example showed that IF your class definition 
is inside a module, then you have to alter your syntax a little to 
retrieve the class with const_get.

Here is another example if it helps (all files are in the current 
directory):

#plugin.rb:

class Dog
  def speak
    puts "Woof woof"
  end
end



#my_program.rb:

require 'plugin'

dog_class = Object.const_get("Dog")
dog = dog_class.new
dog.speak


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