关注接口限制不能关注自己

app/services/watches_service.rb

@@ -1,7 +1,12 @@
+#coding=utf-8
 class WatchesService
   def watch params
     @current_user = User.find(params[:current_user_id])
+    if params[:object_type] == 'user' && params[:current_user_id] == params[:object_id]
+       raise '不能关注自己！'
+    end
     @watchables = find_watchables params
+
     if @watchables.nil?
       raise '404'
     end