<% #TODO: Session necesita mostrarse como en AA en vez de mostrar el id  %>
<% #TODO: Autocompletar: AREA Y SESSION  %>
<% #TODO: Arreglar los datepicker que estan de mas  %>
<%= simple_form_for  [:backend, resource] do |f| %>
  <%= f.input :numero, :label =>"Numero" %>
  <%= f.association :organization, input_html: {class: 'select2'}, label: "Tipo de iniciador" %>
  <%= f.simple_fields_for :initiator do |initiator| %>
    <%= initiator.input :name, :label => "Iniciador"%>
  <% end %>
  <%= f.simple_fields_for :pases do |pases_form| %>
    <%= pases_form.association :area, input_html: {class: 'select2'} %>
    <%= pases_form.association :session, input_html: {class: 'select2'} %>
    <%= pases_form.input :ingreso, as: :date_picker %>
    <%= pases_form.input :fojas %>
    <%= pases_form.input :descripcion %>
  <% end %>
  <%= f.association :tags, input_html: {multiple: true, class: 'chzn-select',
      "data-pre"  => f.object.tags.to_json(methods: :name), only: [:id, :name]} %>
<br>
<%= f.submit %>
<% end %>

<% #TODO: Session necesita mostrarse como en AA en vez de mostrar el id  %>
<% #TODO: Autocompletar: AREA Y SESSION  %>
<% #TODO: Arreglar los datepicker que estan de mas  %>
<%= simple_form_for  [:backend, resource] do |f| %>
  <div>
    <div class="span6">
      <%= f.input :numero, :label =>"Numero" %>
      <%= f.association :organization, input_html: { class: 'select2' }, label: "Tipo de iniciador" %>
      <%= f.simple_fields_for :initiator do |initiator| %>
        <%= initiator.input :name, :label => "Iniciador"%>
      <% end %>
      <%= f.association :tags, input_html: { multiple: true, class: 'chzn-select',
          "data-pre"  => f.object.tags.to_json(methods: :name), only: [:id, :name] } %>
    </div>
    <div class="span6">
      <%= f.simple_fields_for :pases do |pases_form| %>
        <%= pases_form.association :area, input_html: { class: 'select2' } %>
        <%= pases_form.association :session, input_html: { class: 'select2' } %>
        <%= pases_form.input :ingreso, as: :date_picker %>
        <%= pases_form.input :fojas %>
        <%= pases_form.input :descripcion, input_html: { rows: 6 } %>
      <% end %>
    </div>
  </div>
  <div>
    <%= f.button :submit, 'Crear Nota', :class => 'btn-primary' %>
  </div>
<% end %>

Change the notas form into columns
Change the notas form into columns