[Kamailio-Users] Logging of db_extra parameters + serial forking

Here is a problem I am sure is not new (1.5.x):

modparam("acc", "db_extra", "gateway_id=$avp(s:gateway_id)")

route {

...

$avp(s:gateway_id) = 13;

$ru = "some.gw1";

t_on_failure("1");

if(!t_relay()) sl_reply_error(); }

# Serial forking rollover route

failure_route[1] {

if(t_was_cancelled()) exit;

$avp(s:gateway_id) = 14; $rd = "some.gw2";

append_branch();

t_relay();

}

The problem is, when serial forking happens, the CDR rows in 'acc' still show a value of 13 for 'gateway_id'. This is obviously because the value is sampled at the time of the initial stateful relay processing and is not updated afterward.

Any easy/elegant fix? I can think of several fixes that don't involve using 'acc', obviously, but I'd rather avoid that...