Help with relating record to parent, and parents of parent

[Farah5]

I have a child record on a table called "Policy" that has a Parent field. If I add a record to a related list on the Policy table, I want that record to also be added to the related list of the Parent record. If that Parent record also has a Parent, then I want that related record to be added to the related list of that parent's parent, and so fourth. I basically want the record that is added to the related list to be related to the parent -> grandparent -> great grandparent and so fourth until it reaches a point where the Parent field is blank. 

My problem is that I'm just not sure how to script this in a way to have the script keep checking for Parents until there are no more parents. Right now, I have this script, but it only checks for the direct parent of the current record, and nothing further. It's checking for an update on a list field in the related record, and if it's updated, then it will also add the Parent record to that list. 

(function executeRule(current, previous /*null when async*/) {

	var childList = current.u_principle_assertion.split(',');
	var count = 0;
	var query = '';
	
	while(count < childList.length) {
		if(count == 0) {
			query += 'sys_id='+childList[count];
		} else {
			query += '^ORsys_id='+childList[count];
		}
		count++;
	}
	
	// sys_id=4a0d7c1e1bfdd554253e5538624bcb72^ORsys_id=984366b91bb51554253e5538624bcb83^u_parentISNOTEMPTY
	
	var policy = new GlideRecord('sn_compliance_policy');
	policy.addEncodedQuery(query+'^u_parentISNOTEMPTY');
	policy.query();
	
	while(policy.next()) {
		childList.push(policy.getValue('u_parent'));
	}
	
	current.u_principle_assertion = childList.join(',');

})(current, previous);

I hope this makes sense. Any help on figuring out how to related a record going up the parent chain would be great. 

[cynlink1]

@Farah5 - I am trying to solve for the same requirement. Were you able to get it working? If yes, would you mind sharing your final solution? Thanks!