<%= member.user.nil? ? '' : (image_tag(url_to_avatar(member.user), :width => 32, :height => 32)) %> <%= l(:label_username)%> <%= link_to(member.user.show_name, user_path(member.user),:class => "ml10 c_blue02") %> <%= format_date(member.created_on)%> <%= zh_course_role(h member.roles.sort.collect(&:to_s).first)%>