question Re: Widget set catalog item variable after c.server.update() in Developer forum

Widget set catalog item variable after c.server.update()

Ryan M — Fri, 01 Apr 2022 15:51:13 GMT

Widget novice here.

I have a widget that we use to dynamically display some data on a catalog item. It monitors changes to a variable (configuration item) and then makes a server call to see if some specific data exists for that ci. If it does it renders the HTML. After the c.server.update() happens I also want to update a variable on the catalog item that lets me know if data was found. (Using $scope.page.g_form.setValue('ci_data', c.data.display);)

My issue is that the value of c.data.display is the value before the most recent call to c.server.update(); How do I update my catalog item variable to a value set in the most recent run of the server script?

HTML
<div ng-if="c.data.display">CI information goes here.</div>

Client Controller
$scope.$watch(function () {
       return $scope.page.g_form.getValue('configuration_item');
   }, function (ci) {
        if (ci) {
           c.data.ci = ci;
           c.server.update();
            $scope.page.g_form.setValue('ci_data', c.data.display);
       }
   });

Re: Widget set catalog item variable after c.server.update()

-O- — Fri, 01 Apr 2022 17:45:44 GMT

c.server.update()

returns a Promise, so if you write the code

c.server.update();
$scope.page.g_form.setValue('ci_data', c.data.display);

the 2nd instruction will be executed as soon as the server call is issued, long before the answer arrives.

Perhaps try

c.server.update().then(onPromiseFulfilled(c, $scope.page.g_form));

function onPromiseFulfilled (c, g_form) {
	return function (data) {
		c.data.display = data.display;
		g_form.setValue('ci_data', c.data.display);
	}
}

You can also "save" a $watch by setting up an event handler:

$scope.page.g_form.$private.events.on('onChange', function (fieldName, originalValue, newValue) {
	// Replace with actual code checking the modified field and acting when necessary
	console.log('onChange', fieldName, originalValue, newValue);
});

Re: Widget set catalog item variable after c.server.update()

Ryan M — Mon, 04 Apr 2022 12:58:50 GMT

Most excellent, this worked great. Thanks!

Re: Widget set catalog item variable after c.server.update()

-O- — Mon, 04 Apr 2022 15:08:32 GMT

Glad it works and you're most welcome. I appreciate the feedback too!

Re: Widget set catalog item variable after c.server.update()

Subhendu1 — Fri, 29 Nov 2024 06:17:20 GMT

https://support.servicenow.com/kb?id=kb_article_view&sysparm_article=KB0715296

g_setValue is not working for me what is the alternative @Ryan M

Re: Widget set catalog item variable after c.server.update()

-O- — Sat, 30 Nov 2024 12:28:20 GMT

Should we guess what g_setValue is?

Re: Widget set catalog item variable after c.server.update()

Subhendu1 — Sat, 30 Nov 2024 14:15:41 GMT

I was able to figure out why g_form.SetValue wasn't working we have to define g_form in the beginning to inspect form objects .

Re: Widget set catalog item variable after c.server.update()

Subhendu1 — Sat, 30 Nov 2024 14:18:07 GMT

https://www.servicenow.com/community/developer-forum/unable-to-access-g-form-in-widget-code/m-p/1847753