Rails - Apr 2006 - New AJAX function: remote_replace_with_partial() <-- write less code

I hate writing controller actions that support simple lightweight  
ajax calls like this:

def show_buttons
	render :partial => "home_buttons"
end

So the birth of remote_replace_with_partial
Now you can replace a div elements with any controllers partials and  
pass those partials any number of params without having to write  
supportive actions in your controllers. This is a great tool for UI  
changes on the fly and cancel buttons

Heres the code:
application_helper file:
   def remote_replace_with_partial(link, options = {}, params = {})
     ## For passing params ##
     param_string = String.new
     params.each {|key,value|  param_string <<
"&#{key}=#{value}" }

     string = link_to_function(link,
"update_page_element(''#{options
[:update]}'', ''#{options[:controller]}'',
''#{options[:partial]}'', ''#
{param_string}'');")
     string
   end



application.rb file:
   def partial_handler
     string = render_to_string :partial => params[:partial]
     render :inline => string
   end



javascript code: (this can be placed in a JS file or in your template)
<%= javascript_tag "function update_page_element(element_id,  
controller ,partial_file, params)
{
	new Ajax.Updater(element_id, ''/'' + controller +
''/partial_handler?
partial='' + partial_file + params, {asynchronous:true,  
evalScripts:true}); return false;
} " %>

View code:
<%= remote_replace_with_partial(''change me ajax'', {:update
=>
''tag1'', :controller => ''forms'', :partial
=> ''test''}, { :name => ''joe
black'', :id => 2}) %>

Please provide as much feedback as possible -- I''m a noobe rails hacker

Enjoy,
Chris Larson

Looks good - a high-level comment is that it might be a deviation from 
MVC tho?

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