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]

Your approach is good, and logs should help troubleshoot.  Which alerts / messages / logs are you seeing?  Is the Script Include in the same scope as the Catalog Item?  Are you certain there are no other Script Includes with the same name?  Did you add a role to the Access Control when creating the script?  Are you testing as an admin?

[appstorm]

Thanks Brad!  I’m running this at the admin level.  The SI uses the snc_internal role.  There are no logs being generated from both the error or the information side.  The only source of information I have is a console error that generated when the c_num field changes, saying it there is no communication with the Script Include.

[Brad Bowman]

That removes a couple of barriers.  Scope could still be an issue.  If the Catalog Item is in global, the SI should be also, or else you need to include the scope name in the call and make sure it is accessible from all application scopes

[appstorm]

Thanks for the reply!  The Catalog Item is in the Universal scope, as well as the Script Include.