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

if @saved
  # show update message
  status_message = "Added #{@predecessor.description} as dependency."
  unless @original_state == 'pending'
    status_message += " #{@todo.description} set to pending"
  end
  # remove successor from page
  page[@todo].remove
  # regenerate predecessor to add arrow
  page[@predecessor].replace_html :partial => 'todos/todo', :locals => { :todo => @predecessor, :parent_container_type => parent_container_type }

  # show in tickler box in project view
  if source_view_is_one_of :project, :tag
    page['tickler-empty-nd'].hide
    page.replace "tickler", :partial => 'todos/deferred', :locals =>  { :deferred => @todo.project.deferred_todos, 
                                                                        :collapsible => false, 
                                                                        :append_descriptor => "in this project", 
                                                                        :parent_container_type => 'project', 
                                                                        :pending => @todo.project.pending_todos }
  end

  page << "TodoBehavior.enableToggleNotes();"
  page << "TodoBehavior.enableToggleSuccessors();"
  page.notify :notice, status_message, 5.0
else
  page.replace_html "status", content_tag("div", content_tag("h2", "Unable to add dependency"), "id" => "errorExplanation", "class" => "errorExplanation")  
end