> Den 04/05/2015 kl. 14.21 skrev Erik Cederstrand <erik+li...@cederstrand.dk>:
>
> class Month(models.Model):
> year = models.IntegerField()
> month = models.PositiveSmallIntegerField()
>
> def add_months(self, n):
> assert n >= 0
> dy, dm = divmod(self.month + n, 12)
> self.year += dy
> self.month += dm
Sorry, that's supposed to be:
def add_months(self, n):
assert n >= 0
dy, self.month = divmod(self.month + n, 12)
self.year += dy
Disclaimer: This possibly only applies to the Gregorian calendar. Read up on
the others as needed: http://en.wikipedia.org/wiki/List_of_calendars :-)
Erik
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