app/views/msip/gruposper/remplazar.html.erb
<%- model_class = Sivel2Gen::Caso %>
<%= simple_form_for @caso,
url: sivel2_gen.casos_path(@caso).sub(/\./,"/"),
:html => { :class => 'form-horizontal' } do |c| %>
<div class='campos-grupoper-con-victimacolectiva-id'>
<%= c.simple_fields_for :victimacolectiva, @victimacolectiva,
child_index: @vicol_posicion do |vc| %>
<%= vc.input :id, as: :hidden, value: @victimacolectiva.id.to_s %>
<%= vc.simple_fields_for :grupoper do |g| %>
<% s = render partial: 'sivel2_gen/casos/grupoper_campos',
locals: { f: g, fvictimacolectiva: vc } %>
<%= s.html_safe %>
<% end %>
<% end %>
</div>
<% end %>