解决邮件内容空的问题

app/views/mailer/send_for_user_activities.html.erb

@@ -187,7 +187,7 @@
 
 <!--项目相关-->
 <% if @issues.first || @project_messages.first || @issues_journals.first || @wiki_contents.first || @project_news.first || @project_news_comments.first || @project_journal_messages.first ||
-        @project_news_comments.first  %>
+         @project_attachments.first %>
     <div class="wmail_main" style="padding:20px 10px 0px;">
       <h3 class="wmail_h2" style="color:#474646; "><%= l(:label_project_overview_new)%></h3>
       <% unless @issues.first.nil? || @issues_journals.first.nil? %>