How do I convert a GlideDuration field to number of seconds?

[peterdelf]

I'm trying to convert the delivery_time field from a catalogue item to the number of seconds, but I'm going round in circles with GlideDuration and GlideDateTime values.   I know the underlying storage of a GlideDuration object is either seconds or milliseconds.   How do I get to that value?

I've tried the following in background scripts:

var a = new GlideRecord('sc_cat_item');

a.get("0d68ec6edb5c070039f7f70dbf96191d");

gs.print(a.delivery_time.toString());

var b = new GlideDateTime(a.delivery_time.toString());

gs.print(b);

var c = new GlideDuration(0);

gs.print(c.toString());

var d = GlideDateTime.subtract(c, b);

gs.print(d.toString());

Which gives me:

*** Script: 1970-01-03 00:00:00

*** Script: 1970-01-03 00:00:00

*** Script: 1970-01-01 00:00:00

*** Script: 1970-01-03 00:00:00

But I'm going round in circles

Been referring to this - https://developer.servicenow.com/app.do#!/api_doc?v=jakarta&id=r_ScopedGlideDurationGlideDuration_St...

[Elena Pomana]

Hello,

I have a similar task right now.

How did you solve it?

Thank you,

Elena