issue author为空处理

app/views/users/_project_issue.html.erb

@@ -1,3 +1,4 @@
+<% unless activity.author.nil? %>
     <div class="resources mt10" id="user_activity_<%= user_activity_id%>">
       <div class="homepagePostBrief">
         <div class="homepagePostPortrait">
@@ -103,3 +104,5 @@
             user_card_show_hide();
         });
     </script>
+<% end %>
+