A computed field is going to get re-computed every time the record is updated. If that's not the behavior you want, maybe use a default or virtual field (if I understand correctly).
- [web2py] How to avoid computing a field when updating a record? Stodge
- [web2py] Re: How to avoid computing a field when updating a re... pbreit
- [web2py] Re: How to avoid computing a field when updating a re... howesc

