gistfile1.txt

update: (e, ui) ->
      item_id = ui.item.data('item_id')
      position = ui.item.index()
      $.ajax(
        type: 'POST'
        url: $(this).data('update_url')
        dataType: 'json'

        # the :thing hash gets passed to @thing.attributes
        # row_order is the default column name expected in ranked-model
        data: { id: item_id, thing: { row_order_position: position } }