trustieforge/app/views/praise_tread/_praise.html.erb

<% if PraiseTread.where("praise_tread_object_id=? and praise_tread_object_type=? and user_id=?",activity.id,activity.class.to_s,User.current.id).empty? %>
    <a href="<%= praise_tread_praise_plus_path({:obj_id=>activity.id,:obj_type=>activity.class,:user_activity_id=>user_activity_id,:type=>type })%>" data-remote="true" class="<%=type == 'reply'? 'fr' : 'ml15' %> likeButton" title="点赞" >
      <span class="likeText">赞</span>
      <% num = get_praise_num(activity) %>
      <span class="likeNum"><%= num > 0 ? "（#{num}）" : "" %></span>
    </a>
<% else %>
    <a href="<%= praise_tread_praise_minus_path({:obj_id=>activity.id,:obj_type=>activity.class,:user_activity_id=>user_activity_id,:type=>type })%>" data-remote="true" class="<%=type == 'reply'? 'fr' : 'ml15' %> likeButton" title="取消点赞" >
      <span class="likeText">已赞</span>
      <% num = get_praise_num(activity) %>
      <span class="likeNum"><%= num > 0 ? "（#{num}）" : "" %></span>
    </a>
<% end %>