Format.atom w Rails 2.2

Rails
1

in Rails 2.1, this works… but I am stuck w Rails 2.2

class PostsController < ApplicationController
def show
…
respond_to do |format|
format.html
format.atom { render :action => ‘changes’, :layout =>
false, :content_type => ‘application/atom+xml’ }
end
end

def changes
…
respond_to do |format|
format.xml { render :layout => false, :content_type =>
‘application/atom+xml’ }
end
end
…
end

I have a view, changes.xml.builder, building the xml code, but I got
a missing template as an error, when executing
http://localhost:3000/posts/show/5

ActionView::MissingTemplate (Missing template posts/changes.erb in
view path …/Projects/franchising/app/views:):
If I set a changes.erb, the xml code is sent…

how should I write that w Rails 2.2 ?

thanks a lot for your help

erwin

2

mistaken… shoudl write changes.rxml and not xml.builder !!!
dawned copy/paste !!