Django : make_aware expects a naive datetime

Question

I started to work on a project built with Django and I can't figure something out.

I have in my settings.py :

TIME_ZONE = 'UTC'

USE_I18N = True

USE_L10N = True

USE_TZ = True

In my models.py, I have date fields like this :

#...
date = models.DateTimeField(default=timezone.now)
created_at = models.DateTimeField(auto_now_add=True)
updated_at = models.DateTimeField(auto_now=True)
#...

And my urls are defined like this in urls.py :

urlpatterns = patterns(
    '',
    url(r'^api/catalog/', include('catalog.urls')),
    url(r'^api/logs/', include('logs.urls')),
    url(r'^admin/', include(admin.site.urls)),
)

And in catalog/urls.py :

router = DefaultRouter(trailing_slash=False)
router.register(r'users', UserViewSet)
# ...
projects_router = NestedSimpleRouter(router, r'projects', lookup='project', trailing_slash=False)
projects_router.register(r'requests', ProjectRequestViewSet, base_name='project-requests')
# ...
requests_router = NestedSimpleRouter(router, r'requests', lookup='request', trailing_slash=False)
requests_router.register(r'statuses', RequestStatusViewSet, base_name='request-statuses')
# ...
urlpatterns = [
    url(r'^', include(router.urls)),
    url(r'^', include(projects_router.urls)),
    url(r'^', include(requests_router.urls)),
    url(r'^auth/', include('rest_framework.urls', namespace='rest_framework')),
    url(r'^token-auth', views.obtain_auth_token),
]

And since I have updated to Django 1.9.1, I have the following warnings :

.\\env\\lib\\site-packages\\django\\template\\utils.py:37:

RemovedInDjango110Warning: You haven't defined a TEMPLATES setting. You must do so before upgrading to Django 1.10. Otherwise Django will be unable to load templates. "unable to load templates.", RemovedInDjango110Warning)

.\\balrog\\urls.py:8: RemovedInDjango110Warning:

django.conf.urls.patterns() is deprecated and will be removed in Django 1.10. Update your urlpatterns to be a list of django.conf.urls.url() instances instead. url(r'^admin/', include(admin.site.urls)),

(That's not the main point of this question, but any help to remove these warnings is also appreciated.)

And whenever I'm trying to get an object with a date field with the API, I get the following error :

ValueError: make_aware expects a naive datetime, got 2016-01-15 17:18:44.258843+00:00

So this error doesn't occur if USE_TZ is set to False but that's not ideal, I need it to be True .

Another way to remove this error is to edit .\\env\\Lib\\site-packages\\django\\utils\\timezone.py And change this make_aware function :

def make_aware(value, timezone=None, is_dst=None):
    """
    Makes a naive datetime.datetime in a given time zone aware.
    """
    if timezone is None:
        timezone = get_current_timezone()
    if hasattr(timezone, 'localize'):
        # This method is available for pytz time zones.
        return timezone.localize(value, is_dst=is_dst)
    else:
        # Check that we won't overwrite the timezone of an aware datetime.
        if is_aware(value):
            raise ValueError(
                "make_aware expects a naive datetime, got %s" % value)
        # This may be wrong around DST changes!
        return value.replace(tzinfo=timezone)

To this :

def make_aware(value, timezone=None, is_dst=None):
    """
    Makes a naive datetime.datetime in a given time zone aware.
    """
    if timezone is None:
        timezone = get_current_timezone()
    if hasattr(timezone, 'localize'):
        # This method is available for pytz time zones.
        return timezone.localize(value, is_dst=is_dst)
    else:
        return value

But that's not ideal neither.

Why is my make_aware function even called since the dates should already be aware and not naive with USE_TZ set to True ?

Btw, I'm using a SQLite database in case that's related (since sqlite use date field as string afaik)

Answer 1

好的，实际上是因为我的数据库中的某些日期是作为字符串手动插入的，而SQLite并没有什么不同，因此清除数据库并使用Django ORM重建它可以解决此问题。