Help with scripting mandatory fields if the field's choice list changes.

[mitchmo2]

What I have set up here is when there are options in a choice list based upon the previous field choice then that field should become mandatory. So the user has to fill it in. Right now I am running this on onSubmit command, but when I change the choice list in the first field to something that doesn't have any other options in the other 2 fields, the fields stay mandatory even though there are no longer any options to choose from. Any ideas how I can modify my code so where the fields will be mandatory only if there are options in the fields?

I'm guessing I need to put  g_form.setMandatory('subcategory',false);  g_form.setMandatory('u_subcategory_2',false); somewhere.

https://community.servicenow.com/community?id=community_question&sys_id=eed5f94adb382f848e7c2926ca961917

Here's a link to my previous post about this to explain the category situation I am trying to set up.

function onSubmit() {

 if(g_form.getValue("subcategory") == ""){//verify field names
   
    var f1 = g_form.getControl("subcategory");

  if(f1.options.length != 1 ){ //check if the dropdown has choices
     g_form.setMandatory('subcategory',true);
     g_form.addErrorMessage("The following mandatory fields are not filled in: Subcategory");
     return false;
   }
 }
if(g_form.getValue("u_subcategory_2") == ""){//verify field names
   
    var f2 = g_form.getControl("u_subcategory_2");
 if(f2.options.length != 1 ){ //check if the dropdown has choices
    g_form.setMandatory('u_subcategory_2',true);
    g_form.addErrorMessage("The following mandatory fields are not filled in: Subcategory2");
    return false;
}
}

}

[Mark Stanger]

Yes.  Depending on how the timing works, you might need to add a bit of a delay to check if the options are empty (since they change when the category field changes) but that should work.

[mitchmo2]

I have been trying this with no success. It will make subcategory mandatory then leave it mandatory and not change back. 

function onChange(control, oldValue, newValue, isLoading, isTemplate) {
	  if (isLoading || newValue === '') {
      return;
   }
	
	if(newValue != oldValue){
	if(g_form.getValue("subcategory") == ""){//verify field names
		
		var f1 = g_form.getControl("subcategory");
		setTImeout(1000);
		
		if(f1.options.length != 1 ){ //check if the dropdown has choices
			g_form.setMandatory('subcategory',true);
			return false;
		}
		else{
			g.form.setMandatory('subcategory', false);
		}
	}
	}
	
}

[Mark Stanger]

Try this...

function onChange(control, oldValue, newValue, isLoading, isTemplate) {
    if (g_form.getValue("subcategory") == "") {//verify field names
        var f1 = g_form.getControl("subcategory");
        if (f1.options.length > 0) { //check if the dropdown has choices
            g_form.setMandatory('subcategory', true);
        }
        else {
            g.form.setMandatory('subcategory', false);
        }
    }
}

[mitchmo2]

I found the issue and it's when I go to do f1.options.length it's grabbing the current subcat value before the subcat choices can be chnaged. So the previous choice list amount gets passed.

So should I use setTimeout(); and where should I put it? So I can slow down the script enough so it can grab the new choices. 

It seems that the code is moving quicker than the choice list can update and change 

[Mark Stanger]

You're right.  This should work better.

function onChange(control, oldValue, newValue, isLoading, isTemplate) {
    setTimeout(setCatMandatory, 1000);
}

function setCatMandatory() {
    if (g_form.getValue("subcategory") == "") {//verify field names
        var f1 = g_form.getControl("subcategory");
        if (f1.options.length > 1) { //check if the dropdown has choices
            g_form.setMandatory('subcategory', true);
        }
        else {
            g.form.setMandatory('subcategory', false);
        }
    }	
}