Understanding List Collector Variables in ServiceNow

[Srikanth_Peru]

In ServiceNow using the list collector was tricky and helpful where we can able to perform/request more values in a single request

Let’s understand the list collector functionality

Selection of Multiple Items: Users can select multiple items from a list presented in the catalog item form. This is particularly useful when users need to choose multiple related options or entities, such as software applications, services, asset or group.

Benefits:

• User Experience: Simplifies the selection process for users needing multiple items.
• Efficiency: Reduces the need for multiple catalog items by allowing consolidated selections.
• Flexibility: Supports dynamic and conditional item selections based on various criteria.

Let’s understand with a simple use case

Example: User need to be removed from the group he/she present (looks simple ryt )

NOTE: Auto populate the groups based on the user they have selected customer wants to have the auto population of group on the list collector

Script include: 

var Populategroup = Class.create();
Populategroup.prototype = Object.extendsObject(AbstractAjaxProcessor, {
    userDetails: function() {
        var sys_id = [];
        var user = this.getParameter("sysparm_user");
        var userList = new GlideRecord("sys_user_grmember");
        userList.addQuery("user", user);
        userList.query();
        while (userList.next()) {
            var group = userList.group.sys_id.toString();
            var grp = new GlideRecord("sys_user_group");
            grp.get("sys_id", group);
            if (grp.sys_id) {
                sys_id.push(group);
            }
        }
        return sys_id.toString();
    },

    type: 'Populategroup'
});

Client Script: Populate group based on user selected

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

    //Type appropriate comment here, and begin script below
    var user = g_form.getValue("requested_for");
    var ga = new GlideAjax('Populategroup'); // Populategroup is the script include class 
    ga.addParam('sysparm_name', 'userDetails'); // userDetails is the script include fucntion method 
    ga.addParam('sysparm_user', user); // Set parameter sysparm_user to 'user' 
    ga.getXML(userPopulate);


    // the callback function for returning the result from the server-side code
    function userPopulate(response) {
        var answer = response.responseXML.documentElement.getAttribute("answer");
        g_form.setValue("list_of_groups", answer);
    }

Result:

Thanks and Regards,

Srikanth 

LinkedIn: https://www.linkedin.com/in/perumandla-srikanth/  

Wondering will it work on the native as well 

Result on the Native: 

 Happy Learning😉