twers/re-education

- active = :content if active.nil?
- unless lessonplan.nil?
  %ul.plan-menu
    %li{ :class => "#{"current" if active == :content}" }
      %a{ :href => lessonplan_path(lessonplan) } 内容
    - if lessonplan.title == "造纸桥"
      %li{ :class => "#{"current" if active == :ppt}" }
        %a{ :href => "/ppt.html?#{lessonplan.id}" }
          幻灯片
    %li{ :class => "#{"current" if active == :comments}" }
      %a{ :href => lessonplan_path(lessonplan) + "#comments" }
        讨论
        %label{ 'ng-init' => 'commentsCount=' + lessonplan.comments.length.to_s }
          {{commentsCount}}

    %li{ :class => "#{"current" if active == :attachments}" }
      %a{ :href => lessonplan_attachments_path(lessonplan) }
        作业
        %label{ 'ng-init' => 'attachmentsCount=' + lessonplan.lessonplan_attachments.length.to_s }
          {{attachmentsCount}}