diff --git a/lib/event_news_model/cache.rb b/lib/event_news_model/cache.rb
index bdd13b9..e1b0492 100644
--- a/lib/event_news_model/cache.rb
+++ b/lib/event_news_model/cache.rb
@@ -7,17 +7,17 @@ module EventNewsModel
     end
     def do_before_save
       if self.class == SubPart
-        EventNewsCache.where(parent_id:self.id).destroy
-      elsif self.class == EventNews || (self.class == Page && self.module == "event_news")
-        if self.class == EventNews
+        ::EventNewsCache.where(parent_id:self.id).destroy
+      elsif self.class == ::EventNews || (self.class == Page && self.module == "event_news")
+        if self.class == ::EventNews
           tmp_tag_ids = (Array(self.tag_ids) + Array(self.org_tag_ids)).uniq
           Thread.new do
-            EventNewsCache.where(:uid.in => EventNewsFeed.where(:tag_ids.in => tmp_tag_ids.collect{|v| v.to_s}).pluck(:uid)).each do |cache|
+            ::EventNewsCache.where(:uid.in => ::EventNewsFeed.where(:tag_ids.in => tmp_tag_ids.collect{|v| v.to_s}).pluck(:uid)).each do |cache|
               cache.regenerate
             end
           end
         end
-        EventNewsCache.all.destroy
+        ::EventNewsCache.all.destroy
       end
     end
   end