+
+ def get_page_items(items, includes)
+ id_column = "#{items.table_name}.id"
+ page_items = if params[:before]
+ items.where("#{id_column} < ?", params[:before]).order(:id => :desc)
+ elsif params[:after]
+ items.where("#{id_column} > ?", params[:after]).order(:id => :asc)
+ else
+ items.order(:id => :desc)
+ end
+
+ page_items = page_items.limit(20)
+ page_items = page_items.includes(includes)
+ page_items = page_items.sort.reverse
+
+ newer_items_id = page_items.first.id if page_items.count.positive? && items.exists?(["#{id_column} > ?", page_items.first.id])
+ older_items_id = page_items.last.id if page_items.count.positive? && items.exists?(["#{id_column} < ?", page_items.last.id])
+
+ [page_items, newer_items_id, older_items_id]
+ end