[web2py] Logical Delete instead of true delete of a record using crud.update

[ggivler]

Sorry if this is a repeat, but I have not seen my original post. I
have a situation where I would like to use the crud.update with the
delete checkbox, I am using the ondelete callback to set other record
to invalid, however after the ondelete function completes the
underlying record is deleted. Is there a way to keep this from
happening?