event_news/lib/event_news_mod/cache.rb

module EventNewsMod
  module Cache
    require 'active_support/concern'
    extend ActiveSupport::Concern
    included do
      after_save :cache_tag_ids, :do_before_save
      after_destroy :do_before_save
      before_destroy :cache_tag_ids
    end
    def cache_tag_ids
      if self.class == ::EventNews
        @tag_ids = self.tag_ids
        @org_tag_ids = self.org_tag_ids
        @category_id = self.category_id
        @org_category_id = self.org_category_id
      end
    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_mod")
        if self.class == ::EventNews
          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
            ::EventNewsFeedCache.where(:uid.in => ::EventNewsFeed.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
        end
        ::EventNewsCache.all.destroy
      end
    end
  end
end