Handling “None” Choice in Catalog Item Select Box Variable

[Community Alums]

Hello everyone,

I’m working with a catalog item that includes a select box type variable. Unfortunately, this variable does not have a “None” choice(requester dont want to include None as a choice on catalog items but they need it on Native UI). However, in the native UI of the cmdb_ci_appl table, there is an option for “None.”

My challenge is to create an onChange client script that ensures the following behavior:

• If the backend choice is “None,” the catalog item should display as blank (no selection).
• Currently, it defaults to selecting the first variable.

Any guidance or suggestions on achieving this would be greatly appreciated!

Thank you in advance for your help.

Onchange client script:

function onChange(control, oldValue, newValue, isLoading) {
    if (isLoading || newValue == '') {
        return;
    }
    var gainst = new GlideAjax('global.testing123');
    gainst.addParam('sysparm_name', 'getcatupdateform');
    gainst.addParam('sysparm_catupdte', g_form.getValue('appl_name'));
    gainst.getXML(catupdateResponse);

    function catupdateResponse(response) {
        var answer1 = response.responseXML.documentElement.getAttribute("answer");
        var data = JSON.parse(answer1);
        //var data1 = JSON.stringify(data);
       // alert(data1);
        if (data.sur1 == null) {
            g_form.setValue('var1', '', '');
        } else {
            g_form.setValue('var1', '', '');
            g_form.setValue('var1', data.sur1, data.sur2);
            //Type appropriate comment here, and begin script below

        }
    }
}

script Include:

var testing123 = Class.create();
testing123.prototype = Object.extendsObject(AbstractAjaxProcessor, {

    getcatupdateform: function() {
        var obj = {};
        var par = this.getParameter("sysparm_catupdte");
        //gs.addInfoMessage("sysparm_catupdte" + par);
        var gr = new GlideRecord("cmdb_ci_appl");

        if (gr.get(par)) {

            obj.sur1 = gr.getValue('u_string_1');
            obj.sur2 = gr.getDisplayValue('u_string_1');

            var data = JSON.stringify(obj);
            return data;
        }
    },

    type: 'testing123'
});

[AakashG2703]

Hi @Community Alums,

Hope you are doing well. 

Solution Proposed

As a solution, you can edit your catalog item variable by checking the checkbox "Include none" as True that will allow you to set the value as blank or none.

For your reference, also attaching screenshot of the option available in that catalog variable of type "Select Box".

If you find this helpful, Please don't forget to mark my solution and reply as helpful and accepted.

Thanks 🙂

Aakash Garg

ServiceNow Developer

[Community Alums]

Hi @AakashG2703 ,

Thanks for your reply!

requester dont want to include None as a choice on catalog items but they need it on Native UI only

[Maddysunil]

@Community Alums 

Slight modification in client script, Please try the below code:

function onChange(control, oldValue, newValue, isLoading) {
    if (isLoading || newValue == '') {
        return;
    }

    // Check if the newValue is "None"
    if (newValue == 'none') {
        g_form.clearValue('var1'); // Clear the value if "None" is selected
        return;
    }

    // If newValue is not "None", perform AJAX request to retrieve data
    var gainst = new GlideAjax('global.testing123');
    gainst.addParam('sysparm_name', 'getcatupdateform');
    gainst.addParam('sysparm_catupdte', g_form.getValue('appl_name'));
    gainst.getXML(catupdateResponse);

    function catupdateResponse(response) {
        var answer1 = response.responseXML.documentElement.getAttribute("answer");
        var data = JSON.parse(answer1);

        // Check if the data is null or empty
        if (!data || !data.sur1) {
            g_form.clearValue('var1'); // Clear the value if data is null or empty
        } else {
            g_form.setValue('var1', data.sur1, data.sur2);
        }
    }
}

Please Mark ✅Correct if this solves your query and also mark 👍Helpful if you find my response worthy based on the impact.

Thanks

[Community Alums]

Hi @Maddysunil , I tried above code but It is not clearing the values..