From: Logan Capaldo <logancapaldo@...>
Date: 2006-05-09T06:47:48+09:00
Subject: Re: "load"ing a file and keeping the current scope?


On May 8, 2006, at 5:23 PM, Philip Hallstrom wrote:

>>>> For a variety of reasons I have the following situation:
>>>> ---- file_a.rb --------------------------------------
>>>> class A
>>>> 	... magic loading goes here...
>>>> end
>>>> --------------------------------------------------
>>>> ---- file_b.rb --------------------------------------
>>>> class B
>>>> 	... magic loading goes here...
>>>> end
>>>> --------------------------------------------------
>>>> ---- magic_file.rb -----------------------------
>>>> ... does some stuff...  
>>>> ----------------------------------------------
>>>> How can I include the contents of magic_file.rb into both a and  
>>>> b "as is". I've tried load() and it changes the scope so that  
>>>> magic_file.rb doesn't realize it's in A or B.
>>>> I guess I'm looking for the PHP include() equivalent.
>>>> I realize this is a weird question and I realize in most  
>>>> situations this is *not* the way to do it, but I don't have a  
>>>> choice... so please no "do it this other way" solutions :)
>>>> Thanks!
>>>> -philip
>>> class A
>>>   eval(File.read("magic_file.rb"))
>>> end
>
> That worked. Thanks!
>
>> I realize this is against your "no other solutions" rule, but why  
>> won't
>>
>> % cat magic_file.rb
>> module Stuff
>> ...
>> end
>>
>> % cat a.rb
>> class A
>> require 'magic_file'
>> include Stuff
>> end
>>
>> work?
>
> Not sure... (i'm fairly new to ruby) but I tried it and it doesn't.  
> Here's specific details on what I'm doing (rails web services):
>
> http://www.ruby-forum.com/topic/65015#new
>
> -philip
>

% cat magic_stuff.rb
module FindNewerThan
   def self.included(other)
     other.class_eval do
       api_method :find_newer_than,
      :expects => [{:created_at => :datetime}],
      :returns => [[Class.const_get(self.name.to_s.gsub(/Api$/, ''))]]
     end
   end
end

% cat a.rb
require 'magic_stuff.rb'
class A
   include FindNewerThan
end

class B
   include FindNewerThan
end


etc...