Require a field based on value changing in another

[Edwin Fuller]

Hi everyone, within the form I created I have a date field called "Expected Completion Date". Whenever the value of the field changes to any other value I would like the next field "Expected Completion Date Change Reason" to become a required field. So basically in order to change the date field you need to provide a reason. Does anyone know how this can be done, possible using a script?

Thanks,

Edwin

[Pradeep Sharma]

Hi Edwin,

This is simple. You can create a UI policy and trigger it only when i.e Expected completion date is changed then make Expected completed date change reason to mandatory.

Please refer below link for more info.

http://wiki.servicenow.com/index.php?title=Creating_a_UI_Policy

[Abhinay Erra]

Write an onChnage client script on the Expected completion date field and put this script in there

g_form.setMandatory("your field name goes here",true);

[Edwin Fuller]

The script works as intended, but I need a condition. When the field is populated for the first time or there is no previous value then do NOT require the next field

[Abhinay Erra · Accepted solution]

Try this

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

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

  if(g_form.isNewRecord() && newValue!=''){

g_form.setMandatory('u_start_date', false);

}

  return;  

  }  

  if(oldValue != newValue)  

  {  

  g_form.setMandatory('u_start_date', true); //Here replace u_start_date with exact field column name  

  }  

  else  

  {  

  g_form.setMandatory('u_start_date', false); //Here replace u_start_date with exact field column name  

  }  

  //Type appropriate comment here, and begin script below  

}