How to validate if list collector has no value in record producer script

[Dedrei L_]

Please can someone help as I have tried what I think is everything and can't get this to work.  I'm worried I might be going around in circles and stuck focusing on one thing and maybe missing something really straight forward.

What is the correct syntax to validate if a list collector has no value in a record producer script?

currently this is my code:

var clients = "";
clients = producer.u_primary_client.getDisplayValue();
var additionalClients = producer.u_portfolio_list.toString();
if (additionalClients !="")
	{
		  clients += ", " + producer.u_portfolios_list.getDisplayValue();
	}
current.u_clients = clients;

On my form when nothing is selected in u_portfolio_list (list collector) and the field is left completely blank it still enters the IF statement and prints the primary client followed by a comma.

I have tried all of the following:

if (additionalClients !== "")

if (additionalClients !== NULL) and if (additionalClients != NULL)

if (producer.u_portfolio_list.getDisplayValue() !== "")  and if (producer.u_portfolio_list.getDisplayValue() != "")  

if (producer.u_portfolio_list. !== NULL)   and  if (producer.u_portfolio_list. != NULL)

When empty and I print gs.addInfoMessage(producer.u_portfolio_list.toString()) it returns 'undefined' so I have even tried if (producer.u_portfolio_list.toString() == "undefined").

In all these cases the code enters the IF statement and prints the ', '.

Any advice...even if I'm missing something really stupid would be greatly appreciated as this is just doing my head in and wasting sooo much time.

Thanks.

[Allen Andreas]

var clients = '';
clients = producer.u_primary_client.getDisplayValue();
if (producer.u_portfolio_list != '') {
      clients += ", " + producer.u_portfolios_list.getDisplayValue();
}
current.u_clients = clients;

[Allen Andreas]

or perhaps:

var clients = '';
clients = producer.u_primary_client.getDisplayValue();
additionalClients = producer.u_portfolio_list.toString().split(',');
if (additionalClients.length > 0) {
      clients += ", " + producer.u_portfolios_list.getDisplayValue();
}
current.u_clients = clients;

[Dedrei L_]

I found the problem.....typo in the variable name...complicated variable names always tend to cause problems.

[Allen Andreas]

Yea....

Please at least mark other replies as Helpful if they were. You ended up getting two of the best members of these forums helping you out. dvp and sanjiv.

Thanks..