tracks/app/views/todos/add_predecessor.js.erb

<% if !@saved
    if @predecessor.completed? -%>
      TracksPages.page_error("<%= t('todos.cannot_add_dependency_to_completed_todo') %>");
      $('#<%=dom_id(@todo)%>').html(html_for_todo());
<%  else -%>
      TracksPages.page_error("<%= t('todos.unable_to_add_dependency') %>");
<%  end
   else -%>
  remove_successor_from_page();
  replace_updated_predecessor();
  regenerate_predecessor_family();
  <%= "show_in_tickler_box();".html_safe if source_view_is_one_of :project, :tag, :context %>
  TracksPages.page_inform("<%= @status_message %>");

function remove_successor_from_page() {
  <% # TODO: last todo in context --> remove context?? -%>
  $('#<%=dom_id(@todo)%>').remove();
}

function replace_updated_predecessor() {
  $('#<%= dom_id(@predecessor) %>').html( html_for_predecessor() );
}

function show_in_tickler_box() {
  $("#deferred_pending_container-empty-d").hide();
  $('#deferred_pending_container').append( html_for_todo() );
}

function regenerate_predecessor_family() {
<%
  parents = @predecessors.to_a
  until parents.empty?
    parent = parents.pop
    parents += parent.predecessors -%>
    $('#<%= dom_id(parent) %>').html("<%= js_render(parent, { :parent_container_type => parent_container_type }) %>");
<%end-%>
}

function html_for_predecessor() {
  return "<%= js_render(@predecessor, { :parent_container_type => parent_container_type }) %>";
}

<% end # if !@saved

# following js is needed in case of an error with dragging onto a completed action althoug
%>

function html_for_todo() {
  return "<%= js_render(@todo, { :parent_container_type => parent_container_type }) %>";
}