[Django]-Django can't auto save DateTimeFields

by

4👍

✅

First of all DateTimeField supports auto updating like this:

created = models.DateTimeField(editable=False, auto_now_add=True) # Only on creation
updated = models.DateTimeField(editable=False, auto_now=True)     # On every save

Secondly the RuntimeWarning you get, means that you have enabled in your
settings.py timezone aware datetime objects e.g you will see the following:

USE_TZ = True

When you do that, you have to treat datetime objects differently, you have to pass
explicitly a tzinfo value. 

# install the `pytz` module through pip or whatnot
from pytz import timezone
import datetime
from django.utils.timezone import utc

now = datetime.datetime.utcnow().replace(tzinfo=utc)

# To show the time in Greece
athens = timezone('Europe/Athens')
print now.astimezone(athens)

For more info see the django docs and the pytz docs.

About the coercing to Unicode: error, try doing this:

def __unicode__(self):
    return unicode(self.id)
👤rantanplan

0👍

What I did to store now on creation, was use the default attribute of the DateTimeField, and Django’s now() wrapper like so:

from django.utils import timezone

ctime = models.DateTimeField(default=timezone.now)

Please note that this date is in UTC timezone, if you require some other time zone to be set, wrap timezone.now in a lambda that calls localtime()

👤tutuDajuju

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