tracks/app/views/projects/_project.html.erb

<%
@not_done = @not_done_todos.select {|t| t.project_id == project.id }
# invalidate the cache every day because of staleness or
# rendering of "due in x days" that change without touching updated at of the todo
cache [project, source_view_key, current_user.date.strftime("%Y%m%d"), @tag_name] do
-%>
  <%=
    title = source_view_is(:project) ? t('projects.actions_in_project_title') : show_project_name(project)

    render(:partial => 'todos/collection',
      :object => @not_done,
      :locals => { :settings => {
        :id => "p#{project.id}",
        :collapsible => settings[:collapsible],
        :title => title,
        :container_name => 'project',
        :show_empty_containers => settings[:show_empty_containers],
        :parent_container_type => settings[:parent_container_type]
      }})
  %>
<% end -%>