tracks/app/views/contexts/update.js.erb

<% if @saved -%>

  TracksPages.page_notify('notice', '<%= t('contexts.save_status_message') %>', 5);

  <% if @state_changed -%>
    remove_and_re_add_context();
  <% else -%>
    replace_context_form_with_updated_context();
  <% end -%>

<% else -%>
  TracksPages.show_edit_errors(html_for_error_messages());
<% end -%>

function remove_and_re_add_context() {
  $('#<%=dom_id(@context, 'container')%>').slideUp(500, function() {
    $('#<%=dom_id(@context, 'container')%>').remove();
    $('#list-contexts-<%=@new_state%>').append(html_for_context_listing());
  });
}

function replace_context_form_with_updated_context() {
  $('#<%=dom_id(@context, 'container')%>').fadeOut(250, function() {
<%
    # first add the updated context after the old one, then remove old one
    # using html() does not work, because it will replace the _content_ of
    # the container instead of the container itself, i.e. you will get
    # a container within a container which will break drag-and-drop sorting
-%>
    $('#<%=dom_id(@context, 'container')%>').after(html_for_context_listing());
    $('#<%=dom_id(@context, 'container')%>').remove();
    $('#<%=dom_id(@context, 'container')%>').fadeIn(500);
  });
}

function html_for_error_messages() {
  return "<%= escape_javascript(get_list_of_error_messages_for(@context)) %>";
}

function html_for_context_listing() {
  return "<%= escape_javascript(render(:partial => 'context_listing', :object => @context))%>";
}