On Change Client Script Not Working

[Aqil]

I have a OnChange client script running on a catalog item, that runs when the value of a "u_subcategory" variable changes. And, I just want to get the value of "u_subcategory" variable. I'm using the g_form.getValue() method but it's not working, then I used g_scratchpad, but that's too not working. I have checked the ServiceNow logs table, and it is giving the below error:

Exception while executing request: stream has already been operated upon or closed: com.glide.rest.util.RESTRuntimeException: Exception while executing request: stream has already been operated upon or closed: com.glide.rest.handler.impl.ServiceHandlerImpl.handleInvocationTargetException(ServiceHandlerImpl.java:76)
com.glide.rest.handler.impl.ServiceHandlerImpl.invokeService(ServiceHandlerImpl.java:49)
com.glide.rest.processors.RESTAPIProcessor.process(RESTAPIProcessor.java:346)
com.glide.processors.AProcessor.runProcessor(AProcessor.java:733)
com.glide.processors.AProcessor.processTransaction(AProcessor.java:291)
com.glide.processors.ProcessorRegistry.process0(ProcessorRegistry.java:187)
com.glide.processors.ProcessorRegistry.process(ProcessorRegistry.java:175)
com.glide.ui.GlideServletTransaction.process(GlideServletTransaction.java:58)
com.glide.sys.Transaction.run(Transaction.java:2645)
com.glide.ui.HTTPTransaction.run(HTTPTransaction.java:30)
java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
java.base/java.lang.Thread.run(Thread.java:829)

[Kris Moncada]

Hi @Aqil ,

Can you post the onChange catalog client script that you created?

[Aqil]

function onChange(control, oldValue, newValue, isLoading) {

    if (isLoading || newValue == '') {

        return;

    }

     
     var ajax = new GlideAjax('SG_submit_a_ticket');

    ajax.addParam('sysparm_name', 'getSubcategoryValue');

    ajax.addParam('sysparm_category', g_form.getValue('category'));

    ajax.getXMLAndWait();

    var response = ajax.getAnswer();

    alert(response);

    if (response == "Power BI Access Request") {

        g_form.setVisible("name_of_report", true);

    } else {

        g_form.setVisible("name_of_report", false);

    }

}
I tried GlideAjax now, I want to check if the value of the subcategory is "Power BI Access Request", then show the variable "name_of_report". But I'm not getting the "u_subcategory" value.

[Aqil]

var ajax = new GlideAjax('SG_submit_a_ticket');

    ajax.addParam('sysparm_name', 'getSubcategoryValue');

    ajax.addParam('sysparm_category', g_form.getValue('category'));

    ajax.getXMLAndWait();

    var response = ajax.getAnswer();

alert(response);

    if (response == "Power BI Access Request") {

        g_form.setVisible("name_of_report", true);

    } else {

        g_form.setVisible("name_of_report", false);

    }

And, below is the Script Include, because g_form.getValue() method is not working, so I tried GlideAjax too, but it is also not working.

getSubcategoryValue: function() {
var cat = this.getParameter('sysparm_category');
gs.info('Category parameter: ' + cat);
var gr = new GlideRecord('sys_choice');
gr.addEncodedQuery("name=incident^element=subcategory^inactive=false^dependent_value=" + cat);
gr.query();
if (gr.next()) {
gs.info('Subcategory value: ' + gr.getValue('value'));
return ''+ gr.getValue('value');
}
gs.info('No subcategory found');
return '';
}

[Anand Kumar P]

Hi @Aqil ,

    ajax.getXMLAndWait(); Is incorrect method instead use ajax.getXMLWait();

https://www.servicenow.com/community/developer-articles/getxmlwait-alternative-for-service-portal/ta...

If my response helped, please mark it as the accepted solution ✅ and give a thumbs up👍.
Thanks,
Anand