From: Logan Capaldo <logancapaldo@...>
Date: 2006-07-15T12:07:32+09:00
Subject: Re: Preferred monkeypatching technique


On Jul 14, 2006, at 7:09 PM, Eric Hodel wrote:

> On Jul 14, 2006, at 10:57 AM, Logan Capaldo wrote:
>
>> On Jul 14, 2006, at 1:34 PM, Eric Hodel wrote:
>>> On Jul 14, 2006, at 10:24 AM, Tom Werner wrote:
>>>> My specific purpose is to write a plugin for Rails that adds an  
>>>> option to each form field helper (the ones that create <input>  
>>>> tags) that specifies an appropriate class (since CSS attribute  
>>>> selector support is lacking in IE). So I'm using code like this:
>>>>
>>>> module ActionView
>>>>  module Helpers
>>>>    module FormHelper
>>>>
>>>>      # text
>>>>      alias_method :__classless_text_field, :text_field
>>>>      def text_field(object_name, method, options = {})
>>>>        __classless_text_field(object_name, method, options.merge 
>>>> ({:class => (options[:class].to_s + ' text').strip}))
>>>>      end
>>>>
>>>>    end
>>>>  end
>>>> end
>>>
>>> module X
>>>   def does_something(*options)
>>>     p options
>>>   end
>>> end
>>>
>>> module Y
>>>   def does_something(*options)
>>>     super('x', *options)
>>>   end
>>> end
>>>
>>> class C
>>>   include X
>>>   include Y
>>> end
>>>
>>> C.new.does_something 'foo'
>>
>> Rails does "funny" things. These helpers are usually used from  
>> within eruby templates e.g:
>>
>> <html>
>>   <%= text_field( ... ) %>
>> </html>
>>
>> Rails sets up the context in which the templates are executed.  
>> He'd have to go into the actual rails source to fix this. OTOH...
>
> This is what ActionController::Base::helper is for.
>

Did you miss the rest of my post where I told him to use helpers? Did  
the ML slice that part off or something?

> -- 
> Eric Hodel - drbrain@segment7.net - http://blog.segment7.net
> This implementation is HODEL-HASH-9600 compliant
>
> http://trackmap.robotcoop.com
>
>
>