gistfile1.txt

#in the form
    <% if @opportunity.opportunity_filters.size > 0 %>
      <% f.fields_for :opportunity_filters do |filter_form| %>
        <%= render 'opportunity_filters/edit_form', 
          :locals => {:foo => @opportunity.opportunity_filters[0], :f => filter_form} %>
      <% end %>
    <% end %>


#the partial [just for testing, filter_type is an attribute of opportunity_filter]
BLAH <%= foo.filter_type %>