Fix feed.

app/models/event_news_cache.rb

@@ -4,4 +4,27 @@ class EventNewsCache
   field :filter_result
   field :locale,type: String,default: 'zh_tw'
   field :invalid_date, type: DateTime
+  def self.regenerate_all
+    caches = self.all.to_a
+    time_now = Time.now
+    caches.each do |cache|
+      if cache.invalid_date && cache.invalid_date <= time_now
+        cache.destroy
+      else
+        cache.regenerate
+      end
+    end
+    uids = EventNewsFeed.all.pluck(:uid) - caches.collect(&:uid)
+    EventNewsFeed.where(:uid.in=> uids).each do |feed|
+      feed.generate_one_cache()
+    end
+  end
+  def regenerate
+    st = self.start
+    et = self.end
+    dt = self.date
+    uid = self.uid
+    EventNewsFeed.where(uid: uid).each{|v| v.generate_one_cache(startdt: st,enddt: et,dt: dt)} rescue nil
+    self.destroy
+  end
 end