时区在Django中无法正常工作

Question

I want to change timezone in Django, so I read documentation how to do it nad here's what I've got:

#settings.py
TIME_ZONE = 'Europe/Ljubljana'

#models.py   #date_time gets filled with "auto_now=True")
date_time = models.DateTimeField(auto_now=True)

UTC DST offset for given location (Europe/Ljubljana) is +2, while in my db I see timestamp of UTC. So what am I missing?

Or is this working as intended so it gets processed for each request separately (useful for people in different timezones)? But if this is the case, what's the use of setting TIME_ZONE = 'Europe/Ljubljana' ?

Answer 1

From the documentation

When support for time zones is enabled, Django stores datetime information in UTC in the database, uses time-zone-aware datetime objects internally, and translates them to the end user's time zone in templates and forms.

so the datetime in your DB will always be stored in UTC, but will be displayed using the correct TZ in templates and forms.

To get the date in correct TZ elsewhere, use astimezone() :

>>> from myapp.models import Details
>>> import pytz
>>> d = Details.objects.get(pk=1)
>>> d.added
datetime.datetime(2016, 5, 28, 18, 59, 55, 841193, tzinfo=<UTC>)
>>> localdate = d.added.astimezone(pytz.timezone('Europe/Ljubljana'))
>>> localdate
datetime.datetime(2016, 5, 28, 20, 59, 55, 841193, tzinfo=<DstTzInfo 'Europe/Ljubljana' CEST+2:00:00 DST>)