API pagination for all collections using Link header

app/models/concerns/paginable.rb

@@ -2,11 +2,11 @@ module Paginable
   extend ActiveSupport::Concern
 
   included do
-    def self.paginate_by_max_id(limit, max_id = nil, since_id = nil)
-      query = order('id desc').limit(limit)
+    scope :paginate_by_max_id, -> (limit, max_id = nil, since_id = nil) {
+      query = order(arel_table[:id].desc).limit(limit)
       query = query.where(arel_table[:id].lt(max_id)) unless max_id.blank?
       query = query.where(arel_table[:id].gt(since_id)) unless since_id.blank?
       query
-    end
+    }
   end
 end