Fix bug.

app/models/bulletin.rb

@@ -216,7 +216,7 @@ class Bulletin
   end
 
   def self.remove_expired_status
-    self.where(:is_top => true, :top_end_date.ne => nil, :top_end_date.lt => Time.now).each do |b|
+    self.where(:is_top => true, :top_end_date.ne => nil, :top_end_date.lt => Time.now).to_a.each do |b|
       b.is_top = false
       b.top_end_date = nil
       b.save

lib/bulletin_model/cache.rb

@@ -23,7 +23,7 @@ module BulletinModel
           tmp_tag_ids = (Array(@tag_ids) + Array(@org_tag_ids)).uniq
           tmp_cat_ids = (Array(@category_id) + Array(@org_category_id)).uniq
           Thread.new do
-            BulletinFeedCache.where(:uid.in => BulletinFeed.any_of([{:tag_ids.in => tmp_tag_ids.collect{|v| v.to_s}},{:category_ids.in => tmp_cat_ids.collect{|v| v.to_s}}]).pluck(:uid)).each do |cache|
+            BulletinFeedCache.where(:uid.in => BulletinFeed.any_of([{:tag_ids.in => tmp_tag_ids.collect{|v| v.to_s}},{:category_ids.in => tmp_cat_ids.collect{|v| v.to_s}}]).pluck(:uid)).to_a.each do |cache|
               cache.regenerate
             end
           end