var table = $('#products_table').DataTable();
$('#products_table').dataTable().fnClearTable();
<% @special_prices.each_with_index do |special_price, key| %>
	var index = '<%= key +1  %>'
	var row = $('<%= j render (special_price) %>');
	row.find('td:eq(0)').text(index);
	table.row.add(row).draw();
<% end %>