form.html.erb

<% @person.current_employments.each do |emp| %>
  <% f.fields_for :employments, emp do |em| %>
  <%= em.hidden_field :id %>
  <% em.fields_for :company, emp.company do |co| %>
  <%= co.hidden_field :id %>
  <% co.fields_for :special_dataset do |cd| %>
  <%= cd.hidden_field :id %>
  <% em.fields_for :postal_address do |pa| %>
  <% em.fields_for :assistant, emp.assistant do |ast| %>

      more of the form in here

      Q: Can this be cleaned up?

      In most situations it could be cleaner by surrounding the
      specific nested fields in their fields_for calls, but the
      form is segmented (in terms of models) so that these occur
      all over the place, but need to share the same formbuilder
      object, so I can only call each fields_for once.
  
  <%
  # ending all of the nested fields
  end ; end ; end ; end ; end
  %>
<% end %>