onChange Client Script No Response from Script Include

[appstorm]

Need help identifying why my Catalog CS is not able to get a response from my Script Include (see below):

SI:

var LARFStudentInformation = Class.create();
LARFStudentInformation.prototype = Object.extendsObject(AbstractAjaxProcessor, {
    
    // Client callable function to fetch student data
    fetchStudentInfo: function() {
        // Get the c_num parameter passed from the client script
        var cnum = this.getParameter('c_num'); // Retrieve the c_num passed via GlideAjax
        
        try {
            gs.info('Script Include entered with c_num: ' + cnum);  // Log entry into the Script Include

            if (!cnum) {
                gs.error('Error: c_num is required');
                return null;
            }

            var restMessage = new sn_ws.RESTMessageV2();
            restMessage.setRestResourceName('DEFAULT');
            restMessage.setHttpMethod('GET');
            restMessage.setQueryParameter('c_num', cnum);

            var response = restMessage.execute();

            if (!response) {
                gs.error('No response received from REST API for c_num: ' + cnum);
                return null;
            }

            var responseBody = response.getBody();
            gs.info('API Response Body for c_num ' + cnum + ': ' + responseBody);

            var parsedResponse = JSON.parse(responseBody);
            if (!Array.isArray(parsedResponse) || parsedResponse.length === 0) {
                gs.error('No student data found for c_num: ' + cnum);
                return null;
            }

            var studentData = parsedResponse[0];
            gs.info('Student Data Found: ' + JSON.stringify(studentData));

            // Return student data as a JSON string to the client
            return JSON.stringify({
                pidm: studentData.pidm,
                cnumber: studentData.cnumber,
                stst_code: studentData.stst_code,
                gpa_ind: studentData.gpa_ind,
                guest_ind: studentData.guest_ind,
                hold_ind: studentData.hold_ind,
                hold_codes: studentData.hold_codes
            });

        } catch (e) {
            gs.error('Error fetching student data for c_num: ' + cnum + '. Error: ' + e.message);
            return null;
        }
    }
});

CS:

function onChange(control, oldValue, newValue, isLoading) {
    // Exit if the form is still loading
    if (isLoading) {
        return;
    }

    // Exit if the c_num field is empty or hasn't changed
    if (!newValue || newValue === oldValue) {
        return;
    }

    console.log('onChange triggered. New c_num: ' + newValue); // Log new c_num value

    // Call the Script Include function to fetch student information
    getStudentInfo(newValue);
}

function getStudentInfo(cnum) {
    var ga = new GlideAjax('LARFStudentInformation'); // Name of Script Include must match exactly
    ga.addParam('sysparm_name', 'fetchStudentInfo');  // Name of the method to call in the Script Include
    ga.addParam('c_num', cnum); // Pass c_num to the Script Include

    // Add a callback function to process the response
    ga.getXMLAnswer(function(response) {
        console.log('GlideAjax response received: ' + response);

        // Check if response is valid
        if (response) {
            var studentInfo = JSON.parse(response);
            if (studentInfo) {
                g_form.setValue('student_information', JSON.stringify(studentInfo));
            } else {
                g_form.setValue('student_information', 'No student data found.');
            }
        } else {
            console.error('No response from Script Include for c_num: ' + cnum);
            g_form.setValue('student_information', 'Error fetching student data.');
        }
    });
}

The idea here is there is a field named student_information (string) on the form.  When the c_num field changes, the client script should call the Script Include and pass c_num as an http parameter back to the REST API to return the matching string.  Maybe there is a better way to do this?  We can't use tables to store data, since student data is rather large and contains sensitive information.

[Brad Bowman]

It's worth trying the full API name call, in case that's the issue:

var ga = new GlideAjax('sn_uni_req.LARFStudentInformation'); // Name of Script Include must match exactly

Also add an alert or console log at the beginning of the getStudentInfo client script function to confirm that it's making it that far.

[appstorm]

Went ahead and added the prefix to call the API by the full name and added the console log at the beginning of the CS.

Here is the result:

[Brad Bowman]

And System Log > All is not showing the 'Script Include entered...' or 'Error fetching' or any other messages at the time the variable is changed?

[appstorm]

Correct.  No logging is taking place from the Script Include side, almost like it doesn’t exist. 

[Brad Bowman]

Do you still see the console error and/or the log with a simplified script like this?

var LARFStudentInformation = Class.create();
LARFStudentInformation.prototype = Object.extendsObject(AbstractAjaxProcessor, {
	fetchStudentInfo: function() {
		gs.info('Script Include entered');
		return;
	},

    type: 'LARFStudentInformation'
});