var photo_token_inputs = [
  "input[name='<%= j params[:page_part_id] %>[photo_collection_attributes][photo_tokens]']",
  "input[name='<%= j params[:page_part_id] %>[photo_tokens]']"
]
var hidden_input = $(photo_token_inputs.join(", "))

<% if @photos.present? %>
  var photo_collection = $("<%= j render partial: 'photo_collection', locals: {photos: @photos} %>");
  hidden_input.parents('.horizontal-form-content').find('.photo-collection').html(photo_collection);
  hidden_input.val("<%= @photos.map(&:id).join(',') %>");
<% else %>
  hidden_input.val("");
  hidden_input.parents('.horizontal-form-content').find('.photo-collection').empty()
<% end %>

$('.sortable-grid').sortable().bind('sortupdate', function(e) {
  position_array = [];
  $(e.target).find('li.image').each(function(index) {
    position_array.push($(this).data('photo-id'));
  });
  $(e.target).parents('.horizontal-form-content').find('.photo-positions').val(position_array.join(","));
});
$('.sortable-grid').trigger('sortupdate');

$.hideModal();