GlideAjax - Unhandled Exception

[ShaneFr]

Dear SN Community -

I am having a major error with GlideAjax in a Widget that is in a Scoped App that is on the Service Portal. I have already reviewed these sties;

• https://github.com/chucktomasi/technow-glideajax
• https://snprotips.com/blog/2016/2/6/gliderecord-client-side-vs-server-side
• https://community.servicenow.com/community?id=community_article&sys_id=9f7ce2e1dbd0dbc01dcaf3231f96196e

So you have it for the Script Include settings:

• Client callable is checked.
• Accessible from: All Application Scopes
• Protection Policy

The Script Include:

var TBHC_BK = Class.create();
TBHC_BK.prototype = Object.extendsObject(global.AbstractAjaxProcessor, {
	
	getSubCategory: function() {
		var categoryVal = this.getParameter('sysparm_categoryVal');
		var sc = new GlideRecord('sys_choice');
		sc.addQuery('name', 'incident');
		sc.addQuery('element', 'subcategory');
		sc.addQuery('parent', categoryVal);
		sc.query();
		
		while (sc.next()) {
			var eObj = {};
			eObj.value = sc.getValue('value');
			eObj.label = sc.getValue('label');
			list.push(eObj);
		}
		return JSON.stringify(list);
	}
	
});

For the Client Script Call on the Widget:

function ($rootScope, $scope, snRecordWatcher, spUtil, $location, $uibModal, cabrillo, $timeout, $window) {
	
	var c = this;
	
	$scope.updateSubcategory = function () {
		$scope.data.subcategory = [];
		priCategory = $scope.category;
		try {
			var ga = new GlideAjax('TBHC_BK');
			ga.addParam('sysparm_name', 'getSubCategory');
			ga.addParam('sysparm_categoryVal', priCategory);
			ga.getXMLAnswer(subcategoryCallback);
		
			function subcategoryCallback(answer) {
				var objList = JSON.parse(answer);
				for (var i = 0; i < objList.length; i++) {
					var obj = objList[i];
					$scope.data.subcategory.push({
						value: obj.value,
						label: obj.label
					});
				}
			}
		} catch (err) {
			console.log("ERROR - " + err);
		}
		
	};

	
}

Any help would be grateful.

Thanks,

Shane

[Mark Stanger]

Try replacing this line...

var objList = JSON.parse(answer);

with this...

var objList = answer.evalJSON(true);

If that still doesn't work, it's probably time to add in some logging in both scripts to see if you can find exactly where things are breaking.

[Mark Stanger]

In your client script you also need to initialize your variable on this line.

var priCategory = $scope.category;

[ShaneFr]

So I have been putting gs.info/gs.warn in my client script. "TBHC_BK" and I never see it even get executed anywhere in the script no in any logs.

So here is the console from the client script.

Widget 'Report Issue Form' Category: software

Widget 'Report Issue Form' GA Object: [object

Widget 'Report Issue Form' Answer: null

Widget 'Report Issue Form': Answer Empty

Widget 'Report Issue Form' Category: inquiry

Widget 'Report Issue Form' GA Object: [object Object]

Widget 'Report Issue Form' Answer: null

Widget 'Report Issue Form': Answer Empty

[Mark Stanger]

Can you please post your latest scripts? I got this to work just fine from a standard incident form so I know I've got the ajax working. If you post all of the details of your widget so I can set it up in my system I'd be happy to help debug.

[ShaneFr]

Sever Include Script:

var TBHC = Class.create();
TBHC.prototype = Object.extendsObject(global.AbstractAjaxProcessor, {
	
	getSubCategory: function() {
		gs.info('Are we being fired?', 'TBHC_BK');
		gs.info('Fire TBHC:getSubCategory', 'TBHC_BK');
		try {
			var categoryVal = this.getParameter('sysparm_categoryVal');

			var sc = new GlideRecord('sys_choice');
			sc.addQuery('name', 'incident');
			sc.addQuery('element', 'subcategory');
			sc.addQuery('dependent_value', categoryVal);
			sc.addQuery('inactive', 'false');
			sc.query();

			var list = [];

			while (sc.next()) {
				var eObj = {
					value: sc.getValue("value"),
					label: sc.getValue("label")
				};
				list.push(eObj);
			}
			return JSON.stringify(list);
		} catch (e) {
			gs.info('TBHC:' + e, 'TBHC_BK');
		}
	},
	
	type: 'TBHC'
	
});

Widget Client Script:

function ($rootScope, $scope, snRecordWatcher, spUtil, $location, $uibModal, cabrillo, $timeout, $window) {
	
	var c = this;
	$scope.data.subcategory = [];
	
	$scope.updateSubcategory = function () {
		
		try {
			
			console.log("Widget 'Report Issue Form' Category: " + $scope.category);
			
			var ga = new GlideAjax("TBHC");
			ga.addParam('sysparm_name', 'getSubCategory');
			ga.addParam('sysparm_categoryVal', $scope.category);
			ga.getXMLAnswer(subcategoryCallback);
			
			console.log("Widget 'Report Issue Form' GA Object: " + ga);
			
			
			function subcategoryCallback(answer) {
				try {
					console.log("Widget 'Report Issue Form' Answer: " + answer);
					if (answer) {
						var objList = answer;
						for (var i = 0; i < objList.length; i++) {
							var obj = objList[i];
							$scope.data.subcategory.push({
								value: obj.value,
								label: obj.label
							});
						}
					} else {
						console.log("Widget 'Report Issue Form': Answer Empty");
					}
				} catch (e) {
					console.log("Widget 'Report Issue Form' - subcategoryCallback: " + e);
				}
			}
			
		} catch (e) {
			console.log("Widget 'Report Issue Form': " + e);
		}
		
	};

}