Alternative for gs.nowDateTime() in Catalog Client Script?

[LG2]

Hi,

We have a variable in a catalog item called oos_end which is a date/time field.

We need to stop people setting this field to a date in the past - apparently common sense isn't the answer. nor is sacking the culprits - so I'm looking at a Catalog Client Script - type "on Change" - running on that catalog item and variable

I can't use gs.nowDateTime() so can anyone suggest an alternative please?   I've had a trawl through other client scripts we have but they seem to compare the values in two existing fields/variables rather than "now".

thanks in advance for any pointers

(Current release: Berlin)

---------------------

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

    if(isLoading){

    return;

    }

    var now = ?????? ;

    if(newValue < now){

    alert("Polite message about setting dates in the past etc");

        g_form.setValue("variables.oos_end",'');

    }

}

[prdelong]

If you want date/time values for you client script, I would create an Display BR to store those values in g_scratchpad. That will let you reference whatever server side code you need. Here are some examples:

Script Lab - ServiceNow Wiki

Tip: Server side functions and client scripts

https://wiki.servicenow.com/index.php?title=Client_Script_Best_Practices#Example:_g_scratchpad

[Lam_Hoang]

easiest way is to create an GlideAjax.

an client script to call the scipt include, like

var ga = new GlideAjax('LSMC_utils');

ga.addParam('sysparm_name','getnowDateTime');

ga.getXML(parseXML);

function parseXML(response) {

    var answer = response.responseXML.documentElement.getAttribute("answer");

    alert(answer);

}

and a script include like:

var LSMC_utils = Class.create();

LSMC_utils.prototype = Object.extendsObject(AbstractAjaxProcessor, {

    getnowDateTime: function() {

          return gs.nowDateTime();

    }

});

[ccajohnson · Accepted solution]

It sounds as if you want to check the date the person selected in the variable and warn the user if they selected a date in the past. Using the suggestion by Lam_Hoang, we can perform a date/time check on the selected value and return a true/false value that we can throw an alert with.

Step 01. Create a script include that you can call from your Catalog Client Script:

Name: dateTimeUtilAjax

Client callable: true

Script:

var dateTimeUtilAjax = Class.create();

dateTimeUtilAjax.prototype = Object.extendsObject(AbstractAjaxProcessor, {



       checkNowDateTime: function() {

               var firstDT = this.getParameter('sysparm_fdt');

               var nowDT = gs.nowDateTime();

               var diff = gs.dateDiff(firstDT, nowDT, true);

               if (diff > 0) {

                       return false;

               } else {

                       return true;

               }

       },



       getNowDateTime: function() {

               return gs.nowDateTime();

       }



});

Step 02. Create your Catalog Client Script:

Name: Warn if oos_end is before now

Applies to: A Catalog Item

Type: onChange

Catalog item: ***WHATEVER YOUR ITEM IS***

Variable name: oos_end

Script:

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

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

               return;

       }

       if (newValue != oldValue) {

               var startDate = newValue;

               var ga = new GlideAjax('dateTimeUtilAjax');

               ga.addParam('sysparm_name', 'checkNowDateTime');

               ga.addParam('sysparm_fdt', startDate);

               ga.getXML(checkDate);

       }

}



function checkDate(response) {

       var answer = response.responseXML.documentElement.getAttribute("answer");

       if (answer == 'false') {

               alert("You must select a date in the future");

               g_form.setValue('oos_end', '');

       }

}

Let me know if you are still having difficulty.

[LG2]

Thank you so much - (and everyone else for their replies too) - this has worked an absolute treat!   No more relying on common sense...   many thanks!