Extending a Script Include Not Working

[sarah_kovar]

Hello, 

I am trying to extend the script include 'SCPopularItems'. This script include is not read only, but there is only one method contained in it that I want to override. We'd like to leave 'SCPopularItems' OOB so we can continue to receive updates to it during upgrades. 

I've looked at two official docs from ServiceNow on this as well as countless Community articles. 

Right now the only difference (for testing purposes) between 'SCPopularItems' and 'MySCPopularItems' is I've placed a gs.log statement within MySCPopularItems to see when it's triggered. I do have additional customizations to it that I will place, but wanted to just prove out whether it will override the method contained within the OOB script include.

Can anybody tell me why this isn't working?
I've tried uncommenting and commenting the three lines of code for 'initialize: function()...'  

New script include name: 'MySCPopularItems'

var MySCPopularItems = Class.create();

MySCPopularItems.prototype = Object.extendsObject(SCPopularItems, {

    // initialize: function() {

    //     SCPopularItems.prototype.initialize.call(this);

    // },

    _getFromChannelAnalytics: function() {

        gs.log("SBK MySCPopularItems _getFromChannel called"); //only customization to this method at this time

        var itemsResult = [];

        var citm = 0;

        var count = new GlideAggregate('catalog_channel_analytics');

        count.setCategory('catalog_meta');

        count.setGroupByFollowRef(false);

        count.setOrderByFollowRef(false);

        count.addAggregate('COUNT', 'catalog_item');

        count.groupBy('catalog_item');

        count.addEncodedQuery(this._basicQueryFilters[this._baseQuery] || '');

        if (Array.isArray(this._allowedItemsList))

            count.addQuery('catalog_item', "IN", this._allowedItemsList);

        count.addNotNullQuery('catalog_item');

        // Donot Include items ordered as part of orderguide

        count.addNullQuery('order_guide');

        count.addNotNullQuery('document_key');

        count.orderByAggregate('COUNT', 'catalog_item');

        count.query();

        while (citm < this._itemsLimit && count.next()) {

            var catItemId = count.getValue("catalog_item");

            var catalogItemJS = new sn_sc.CatItem(catItemId);

            var catItemDetails = this._itemSummaryFetcher(catalogItemJS);

            if (!this._allowItem(catalogItemJS, catItemDetails))

                continue;

            if (this._itemValidator(catalogItemJS, catItemDetails)) {

                var response = this._responseObjectFormatter(catItemDetails, catItemDetails.sys_class_name, count.getAggregate('COUNT', 'catalog_item'));

                var massageWith = this._getMassageObject(catItemDetails.name, count.getAggregate('COUNT', 'catalog_item'));

                itemsResult.push(this._massageResponseObject(response, massageWith));

                citm++;

            }

        }

        var guides = 0;

        count = new GlideAggregate('catalog_channel_analytics');

        count.setCategory('catalog_meta');

        count.setGroupByFollowRef(false);

        count.setOrderByFollowRef(false);

        count.addAggregate('COUNT', 'sys_id');

        count.groupBy('catalog_item');

        count.addNotNullQuery('catalog_item');

        count.addQuery('table_name', 'sc_cat_item_guide');

        count.addEncodedQuery(this._basicQueryFilters[this._baseQuery] || '');

        if (Array.isArray(this._allowedItemsList))

            count.addQuery('catalog_item', "IN", this._allowedItemsList);

        count.orderByAggregate('COUNT', 'sys_id');

        count.query();

        while (guides < this._itemsLimit && count.next()) {

            var guideId = count.getValue("catalog_item");

            catalogItemJS = new sn_sc.CatItem(guideId);

            catItemDetails = this._itemSummaryFetcher(catalogItemJS);

            if (!this._allowItem(catalogItemJS, catItemDetails))

                continue;

            if (this._itemValidator(catalogItemJS, catItemDetails)) {

                response = this._responseObjectFormatter(catItemDetails, 'sc_cat_item_guide', count.getAggregate('COUNT', 'sys_id'));

                massageWith = this._getMassageObject(catItemDetails.name, count.getAggregate('COUNT', 'sys_id'));

                itemsResult.push(this._massageResponseObject(response, massageWith));

                guides++;

            }

        }

        itemsResult.sort(function(a, b) {

            return a.order == b.order ? a.name.localeCompare(b.name) : -(a.order - b.order);

        });

        return (itemsResult.length > this._itemsLimit) ?

            itemsResult.slice(itemsResult.length - this._itemsLimit, itemsResult.length) :

            itemsResult;

    },

    type: 'MySCPopularItems'

});

[Community Alums]

Hi @sarah_kovar ,

Have you tried this approach ?

var MySCPopularItems = new (API Name of script Include);

[sarah_kovar]

Hi, 

That approach doesn't work. 

Thanks.

[Bert_c1]

Hi Sarah,

Unless your script include is defined in the 'Global' application scope, gs.log() won't work. Instead use 'gs.info();' that does work in non-global application scopes.  As as seen in the OOB examples, an 'initialize' function is needed. The following is from the 'Incident' script include that can be used to override functions in the 'IncidentSNC' script include.

var Incident = Class.create();
Incident.prototype = Object.extendsObject(IncidentSNC, {

	initialize: function(incidentGr) {
		IncidentSNC.prototype.initialize.call(this, incidentGr);
	},
	
    type: 'Incident'
});

I hope you find success.

[sarah_kovar]

Hi, thanks. They're both in global. My script include is copied from an OOB example and as stated in my original post I have tried with the initialize function and without. 

[Bert_c1]

Hi Sarah,

My script include:

var Incident = Class.create();
Incident.prototype = Object.extendsObject(IncidentSNC, {

	initialize: function(incidentGr) {
		IncidentSNC.prototype.initialize.call(this, incidentGr);
	},

	logMessage: function(msg) {
		gs.log('My logMessage function has been called, msg: ' + msg);
	},

    type: 'Incident'
});

My test script (run in Scripts Background):

var inc = new GlideRecord('incident');
inc.query();
if (inc.next()) {
var incObj = new Incident();
incObj.logMessage("Number is " + inc.number);
incObj.logMessage("This is msg2.");
}

Output from scripts background:

*** Script: My logMessage function has been called, msg: Number is INC0000060
*** Script: My logMessage function has been called, msg: This is msg2.

From Script Log Statements:

Good luck on your implementation.