<% if activity.try(:author).try(:realname) == ' ' %> <%= link_to activity.try(:author), user_path(activity.author_id), :class => "newsBlue mr15" %> <% else %> <%= link_to activity.try(:author).try(:realname), user_path(activity.author_id), :class => "newsBlue mr15" %> <% end %> TO <%= activity.project.name %>(项目讨论区)