Rails - Feb 2012 - how to get the index of the element passed to the render view ?

I am displaying a collection of expenses in a form

the view in which the fom is displayed :
...
				=  simple_form_for(@project, :html => {:class =>
''form-stacked'' })
do |f|
					- unless @project.expenses.count > 0
						No expenses
					- else
						#expenses
							= f.fields_for :expenses do |f|
								= render "backoffice/projects/expense_fields", :f => f
				.clearfix

and the expense_fields partial is  :

.row
	= f.input :label, :wrapper => :nolabel, :input_html => { :class =>
"span3" }

I would like to test when the first expense item is displayed  :

.row
        -  "if first expense.. test
            = f.input :label,  :input_html => { :class =>
"span3" }
#  use the standard wrapper with labels
        - else
	    = f.input :label, :wrapper => :nolabel, :input_html => { :class
=> "span3" }  # no label wrapper

is there any way to do it ?

thanks for your feedback

-- 
You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en.