sort_option.cr

class UserQuery < User::BaseQuery
 macro safe_sort(default, **scopes)
  def safe_sort(sort_by : String = {{ default }})
   case sort_by
   {% for key, value in scopes %}
   when  {{ key.stringify }}
     {{ value.id }}
   {% end %}
   else
     raise "Unknown sorty option #{sort_by}"
   end
 end
 
 safe_sort default: recently_updated, 
   recently_updated: updated_at.desc_order,
   recently_created: created_at.desc_order
end