Question

I have this code

class MyModel(models.Model):
    date = models.DateTimeField(blank=True, default=datetime.now)

in models.py. In view I get the object:

obj = MyModel.objects.get(id=2)

and i wish change the date for the year ahead. How to do this?

Answer 1

If you need to be exact with leap years:

import datetime, calendar

obj = MyModel.objects.get(id=2)
next_date = obj.date + datetime.timedelta(days=365)
if calendar.isleap(obj.date.year) and obj.date <= datetime.datetime(obj.date.year, 2, 29) or \
   calendar.isleap(next_date.year) and obj.date > datetime.datetime(obj.date.year, 2, 28):
    next_date += datetime.timedelta(days=1)
obj.date = next_date
obj.save()