<%= fields_for "#{@package.class.to_s.underscore}[context_attributes][#{Time.now.to_i}]", context do |child| %>

<%= render partial: 'field_attrs', locals: { form: child, context: context } %>

<%= render partial: "transit/contexts/#{context.class.to_s.underscore}", locals: { form: child, context: context } %> <% end %>