$('tr[id=ingredient-<%= @ingredient.id %>]').nextUntil('tr.primary', ':not(.ingredient)')
  .remove();
var columns = $('table > thead > tr > th').length;
$('tr[id=ingredient-<%= @ingredient.id %>]').nextUntil('tr.primary').addBack().after(
  '<tr><td class="form" colspan="'+columns+'">' +
  '<div id="edit-ingredient"><%= j render partial: "ingredients/edit_form" %></div>' +
  '</td></tr>'
);