Merb devel - Nov 2007 - transition form respond_to to provides

I really like the new mime type handler however I was trying to convert some
code and couldn''t figure out how.

My rails action was handle 2 formats, html and xml

      respond_to do |format|
        format.html # show.html.erb
        format.xml do
          if @account.active? &&
@account.valid_referer?(session[:referer])
            render :xml => @account.to_xml(:except => [:id, :created_at])
         else
            render :text => ''your account has been disable''
         end
       end

Now that I''m trying to switch this controller to Merb, I can''t
figure how to
have a custom xml builder and how to have a condition to the mime type
render.

Any help would be greatly appreciated.

Thanks

-Matt
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>       respond_to do |format|
>         format.html # show.html.erb
>         format.xml do
>           if @account.active? && @account.valid_referer?(session 
> [:referer])
>             render :xml => @account.to_xml(:except =>  
> [:id, :created_at])
>          else
>             render :text => ''your account has been
disable''
>          end
>        end

Here''s an untested quick rewrite.

provides :xml
if content_type == :xml
   if @account.active? && @account.valid_referer?(session[:referer])
     render :xml => @account.to_xml(:except => [:id, :created_at])
   else
     "Your account has been disabled."
   end
else
   render
end