According to the book, in the DAL chapter, subtitle: 'before and after
callbacks', we can use:
>>> db.person._before_delete.append(lambda s: pprint(s))
>>> db.person._after_delete.append(lambda s: pprint(s))
where:
s is the Set object used for update or delete.
However,
def person_before_delete(s): #s a Set object
anid=s.select()[0].name
def person_after_delete(s): #s a Set object
anid=s.select()[0].name
The first function, actually can get this name value, whereas the second
cannot. In the second case, the
len(s.select()) returns 0 rows. Is this the expected behaviour?
I need the 'name' value of the deleted row, for some further actions, and now I
am using both "_before_delete"
to get the value I want and set some global variable in my db.py, and then
"_after_delete" to trigger an update
function of the actual count of the persons left, using the stored global
variable. But this way, doesn't look
so right to me.
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