Rails - Jul 2006 - Extending Ruby classes in Rails

Hi.

I''ve placed the following in lib/mods.rb:

class String
   def String.foo
     "bar"
   end

   def bar
     "baz"
   end
end

But it does not get picked up:

white:~/svn/tagticks morten$ script/console
Loading development environment.
 >> String.foo
NoMethodError: undefined method `foo'' for String:Class
         from (irb):1
 >> "fdsfs".foo
NoMethodError: undefined method `foo'' for "fdsfs":String
         from (irb):2
 >> "fdsfs".bar
NoMethodError: undefined method `bar'' for "fdsfs":String
         from (irb):3


What''s the appropriate way to extend a ruby class for a rails app?

Thanks.

Morten

Morten wrote:
> 
> Hi.
> 
> I''ve placed the following in lib/mods.rb:
> 
> class String
>   def String.foo
>     "bar"
>   end
> 
>   def bar
>     "baz"
>   end
> end
> 
> But it does not get picked up:
> 
> white:~/svn/tagticks morten$ script/console
> Loading development environment.
>  >> String.foo
> NoMethodError: undefined method `foo'' for String:Class
>         from (irb):1
>  >> "fdsfs".foo
> NoMethodError: undefined method `foo'' for "fdsfs":String
>         from (irb):2
>  >> "fdsfs".bar
> NoMethodError: undefined method `bar'' for "fdsfs":String
>         from (irb):3
> 
> 
> What''s the appropriate way to extend a ruby class for a rails app?
> 
> Thanks.
> 
> Morten
> 
> 
> 
> _______________________________________________
> Rails mailing list
> Rails@lists.rubyonrails.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
> 
You must require mods somewhere in your rails code. Try adding
   require ''mods''
to your environment.rb, for example. It''s only models and a few other 
things that gets loaded automagically.


-- 
  Ola Bini (http://ola-bini.blogspot.com)
  JvYAML, RbYAML, JRuby and Jatha contributor
  System Developer, Karolinska Institutet (http://www.ki.se)
  OLogix Consulting (http://www.ologix.com)

  "Yields falsehood when quined" yields falsehood when quined.

>>
>> What''s the appropriate way to extend a ruby class for a rails
app?
>>
> 
> You must require mods somewhere in your rails code. Try adding
>   require ''mods''
> to your environment.rb, for example. It''s only models and a few
other
> things that gets loaded automagically.
> 
Excellent, I added the following to environment.rb and now it works.

require File.join("#{RAILS_ROOT}/lib", ''mods'')

Thanks Ola.

Morten

On 7/17/06, Morten <lists@kikobu.com> wrote:
> What''s the appropriate way to extend a ruby class for a rails app?

The preferred route that most people take is to bundle the modifications as
a plugin and require the necessary files in the plugin''s init.rb.  See
Top-Funky''s excellent tutorial for more info:
http://nubyonrails.com/articles/2006/05/04/the-complete-guide-to-rails-plugins-part-i


Josh
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