fix sorting error

app/controllers/announcements_controller.rb

@@ -147,7 +147,7 @@ class AnnouncementsController < ApplicationController
       else
         feeds_anns = get_feed_announcements("widget")
         rest_all_anns = feeds_anns + sorted_anns.select{|v| !v.is_top}.take(rest_count).map{|v| data_to_human_type(v)}
-        rest_anns = rest_all_anns.sort_by{|v| v["postdate"]}.take(rest_count)
+        rest_anns = rest_all_anns.sort{|v1,v2| v2["postdate"]<=>v1["postdate"]}.take(rest_count)
         anns = top_anns + rest_anns
       end
     end

lib/announcement/engine.rb

@@ -35,6 +35,10 @@ module Announcement
         data[key1] = [value1,value2,value3]
         data_item[key_item1] = [value_item1,value_item2,value_item3]
         data_item[key_item2] = [value2_item1,value2_item2]
+        require File.expand_path('../../../app/models/anns_cache', __FILE__)
+        if defined? AnnsCache
+          AnnsCache.all.destroy
+        end
       rescue  => e
         puts ['error in announcement',e]
       end