My requirement is to pull the values of Note fields (Type,Memo,Title etc.) of a purchase order and need to concatenate all the Note fields and set them into field on purchase order form.Please let me know how should proceed?

Solutions tried by me :1.i created userevent on edit of purchase order and i m pulling all notes field values by creating saved search in script itself,but problem cmes when directly persong add new notes and edit any previous note script is not gettin fired .To prevent this ,i deployed my script on note instead of purchase order but in this case search filter of saved search is not working in which i m picking usernotes of particular purchase order by using internal id of  particular PO.