app/models/acl.rb

   1 class Acl < ActiveRecord::Base
   2   def self.find_by_address(address, options)
   3     self.with_scope(:find => {:conditions => ["#{inet_aton} & netmask = address", address]}) do
   4       return self.find(:first, options)
   5     end
   6   end
   7
   8   def self.find_all_by_address(address, options)
   9     self.with_scope(:find => {:conditions => ["#{inet_aton} & netmask = address", address]}) do
  10       return self.find(:all, options)
  11     end
  12   end
  13
  14 private
  15
  16   def self.inet_aton
  17     if self.connection.adapter_name == "MySQL"
  18       "inet_aton(?)"
  19     else
  20       "?"
  21     end
  22   end
  23 end