Rails - Jun 2011 - Argument Error when trying to render xml

I have an application which uses gcal4ruby and retrieves events from a
Calendar object.
The events are received fine and I can look at them in the console
however, when I try to render them in xml by using the following line

render :xml => e

I get the ArgumentError, ''wrong number of arguments (1 for
0)''.
Just to see if the data is there, I also did ''render :text =>
e.to_xml'',  the object is displayed (the xml labels are swallowed up
by the browser but I can see the content).

I''ve search all over for what possible reason render :xml would fail
with this error but I''m having no luck.

Any ideas are greatly appreciated.

Here''s the controller code:

    s=Service.new
    s.authenticate(''mylogin'',''mypassword'')
    @cal=Calendar.find(s,{:title=>"Public"}).first
    @events = @cal.events
    e=@events.first
    respond_to do |format|
      format.html { render :xml => e }
    end

Here''s the end of the stack trace:

ruby/1.8/gems/actionpack-3.0.3/lib/action_controller/metal/
renderers.rb:87:in `to_xml''
ruby/1.8/gems/actionpack-3.0.3/lib/action_controller/metal/
renderers.rb:87:in `_render_option_xml''
ruby/1.8/gems/actionpack-3.0.3/lib/action_controller/metal/
renderers.rb:40:in `_handle_render_options''
ruby/1.8/gems/actionpack-3.0.3/lib/action_controller/metal/
renderers.rb:47:in `render_to_body''
ruby/1.8/gems/actionpack-3.0.3/lib/action_controller/metal/
compatibility.rb:55:in `render_to_body''
ruby/1.8/gems/actionpack-3.0.3/lib/abstract_controller/rendering.rb:
101:in `render_to_string''
ruby/1.8/gems/actionpack-3.0.3/lib/abstract_controller/rendering.rb:
92:in `render''
ruby/1.8/gems/actionpack-3.0.3/lib/action_controller/metal/
rendering.rb:17:in `render''
ruby/1.8/gems/actionpack-3.0.3/lib/action_controller/metal/
instrumentation.rb:40:in `render''
...





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Couple of things here:
1. respond_to is Rails 2 way of doing things, it''s more convenient to
use
respond_with in Rails 3
2. If you want to send back xml, then you should ideally be sending in a xml 
request instead on html request

If you want to stick with respond_to call and always render xml from this 
method... then you can use this block:
    respond_to do |format| 
      format.*xml* { render :xml => e } 
    end

Otherwise if you change the request to a xml request instead of normal html 
request, then you can use this:

class ServicesController < ApplicationController  
  respond_to :html, :xml

  def method_name
    s=Service.new 
    s.authenticate(''mylogin'',''mypassword'') 
    @cal=Calendar.find(s,{:title=>"Public"}).first 
    @events = @cal.events 
    e...-LrNvcUpfV8H9nciapvbvcA@public.gmane.org 
    respond_with(e)
  end
end

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