Add pagination at backend index page

app/models/archive_file.rb

@@ -27,7 +27,7 @@ class ArchiveFile
   field :rss2_sn
   
   # scope :can_display,where(is_hidden: false)
-  scope :can_display, ->{where(is_hidden: false).asc(:sort_number, :title).desc(:is_top)}
+  scope :can_display, ->{where(is_hidden: false).order_by(:is_top=>-1, :sort_number=>1, :title=>1)}
 
   # belongs_to :archive_file_category