photomix/app/views/collections/_form.html.erb

<fieldset>
  <div class="control-group">
    <%= form.label :title, t('activerecord.models.collection.attributes.title'), {:class => 'control-label'} %>
    <div class="controls">
      <%= form.text_field :title, {:class => 'input-xlarge'} %>
    </div>
  </div>

  <div class="control-group">
    <%= form.label :description, t('activerecord.models.collection.attributes.description'), {:class => 'control-label'} %>
    <div class="controls">
      <%= form.text_area :description, {:class => 'input-xlarge', :rows => 5} %>
    </div>
  </div>

  <% unless @collection.albums.empty? %>
      <%= form.label :albums %>
      <% @collection.albums.each do |album| %>
          <%= form.fields_for :album_list do |album_fields| %>
              <%= image_tag "delete-24x24.png", :class => "delete", :alt => "Delete" -%>
              <% if album.photos.empty? %>
                  <%= album.title %>
              <% else %>
                  <%= image_tag album.photos.first.attachment.thumb.url, :alt => album.title %>
              <% end %>
              <%= album_fields.hidden_field album.id %>
          <% end %>
      <% end %>

      <%
         grouped_options = [
                 ['Available albums', [['Choose album to add', '']]],
                 ['Not used', Album.unused.map { |album| [album.title, album.id] }],
                 ['In use', Album.used.map { |album| [album.title, album.id] }]
         ]
         grouped_options_for_select(grouped_options)
      %>
      <%= select_tag 'available_albums', grouped_options_for_select(grouped_options) %>
  <% end %>
</fieldset>