如果没有大于两条回复。那么展开回复就要隐藏

app/views/memos/show.html.erb

@@ -75,7 +75,9 @@
       <div class="homepagePostReplyBannerCount">回复（<%=@reply_count %>）</div>
       <div class="homepagePostReplyBannerTime"></div>
       <div class="homepagePostReplyBannerMore">
+        <% if @reply_count > 2%>
         <a href="javascript:void(0);" class="replyGrey"  id="reply_btn_<%= @memo.id%>" onclick="expand_reply('#reply_div_<%= @memo.id %>','#reply_btn_<%= @memo.id%>')" data-count="<%= @reply_count %>" data-init="0" >点击展开更多回复</a>
+        <% end %>
       </div>
     </div>
     <div class="" id="reply_div_<%=  @memo.id %>">