validates_uniqueness_of :sp_mac, :allow_nil => true, :allow_blank => true

validates_uniqueness_of :sp_name, :sp_ip, :allow_blank => true, :allow_nil => true

validates_presence_of :architecture_id, :operatingsystem_id, :if => Proc.new {|host| host.managed}

validates_presence_of :mac, :unless => Proc.new { |host| host.hypervisor? or host.compute? or !host.managed }

validates_length_of :root_pass, :minimum => 8,:too_short => 'should be 8 characters or more'