How to identify if userid already exists?

[praveenKumar2]

Hi All,

I have a requirement to check if a userid already exists and if it exists an error should be thrown user id already exists. There is a field on a catalog item and when a user enters the user id like pkmar00 it should check behind the scenes and throw an error and clear out the field value. 

Kindly please help me. 

Thanks & Regards.

Praveen.

[MrMuhammad]

Please replace findUser with readuserID in the script include 2nd line. See screenshot below

[praveenKumar2]

Thank you Muhammad. I didnt catch it while changing the code. 

Much Appreciated 🙂

[Hitoshi Ozawa · Accepted solution]

Try this. Tested it with "abraham.lincoln", "donald.trump"

Script Include:

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

    validateUser: function() {
        var user_id = this.getParameter('user_id');
        var gr = new GlideRecord("sys_user");
        gr.addQuery("user_name", user_id);
        gr.query();
        if (gr.next()) {
            return true;
        } else {
            return false;
        }
    },

    type: 'checkUserExists'
});

UI Script:

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

    var ga = new GlideAjax('checkUserExists');
    ga.addParam('sysparm_name', "validateUser");
    ga.addParam('user_id', newValue);
    ga.getXMLAnswer(function(answer) {
        if (answer == "true") {
            g_form.clearValue('user_id');
            g_form.showFieldMsg('user_id', 'User already exists.');
        }
    });
}

[praveenKumar2]

Thank You Hozawa, 

Can you please provide the difference between the two methods below?

ga.addParam('user_id', newValue);
    ga.getXMLAnswer(function(answer) {
        if (answer == "true") {

ga.addParam('sysparm_user_name', newValue);
ga.getXML(callBack);
 
function callBack(response) {
  var answer = response.responseXML.documentElement.getAttribute("answer");

I would like to understand the difference between them.

Thanks,

pK.

[MrMuhammad]

Hi PK,

Refer - https://community.servicenow.com/community?id=community_article&sys_id=c918c3b8db968c5013b5fb2439961...

Above link has worthy information around this 

Thanks & Regards,

Sharjeel