fix

app/views/users/_user_fans_or_watch.html.erb

@@ -13,7 +13,7 @@
 </div>
 <% if user != User.current %>
 <div class="fr">
-  <% if(user.watched_by?(User.current)) %>
+  <% if Watcher.where(user_id: User.current.id, watchable_id: user.id, watchable_type: %w(Principal User)).exists? %>
     <%= link_to "取消关注",
                 unwatch_path(:object_type => 'user', :object_id => user.id, :target_id => @user.id, :action_name => action),
                 :class => "user_default_btn user_private_btn fl mr30 mt20",