def to_current_timezone(value):
"""
When time zone support is enabled, convert aware datetimes
to naive dateimes in the current time zone for display.
"""
if settings.USE_TZ and value is not None and timezone.is_aware(value):
current_timezone = timezone.get_current_timezone()
return timezone.make_naive(value, current_timezone)
return value
def set_cookie(self, key, value='', max_age=None, expires=None, path='/',
domain=None, secure=False, httponly=False):
"""
Sets a cookie.
``expires`` can be:
- a string in the correct format,
- a naive ``datetime.datetime`` object in UTC,
- an aware ``datetime.datetime`` object in any time zone.
If it is a ``datetime.datetime`` object then ``max_age`` will be calculated.
"""
self.cookies[key] = value
if expires is not None:
if isinstance(expires, datetime.datetime):
if timezone.is_aware(expires):
expires = timezone.make_naive(expires, timezone.utc)
delta = expires - expires.utcnow()
# Add one second so the date matches exactly (a fraction of
# time gets lost between converting to a timedelta and
# then the date string).
delta = delta + datetime.timedelta(seconds=1)
# Just set max_age - the max_age logic will set expires.
expires = None
max_age = max(0, delta.days * 86400 + delta.seconds)
else:
self.cookies[key]['expires'] = expires
if max_age is not None:
self.cookies[key]['max-age'] = max_age
# IE requires expires, so set it if hasn't been already.
if not expires:
self.cookies[key]['expires'] = cookie_date(time.time() +
max_age)
if path is not None:
self.cookies[key]['path'] = path
if domain is not None:
self.cookies[key]['domain'] = domain
if secure:
self.cookies[key]['secure'] = True
if httponly:
self.cookies[key]['httponly'] = True
def to_python(self, value):
if value is None:
return value
if isinstance(value, datetime.datetime):
if settings.USE_TZ and timezone.is_aware(value):
# Convert aware datetimes to the default time zone
# before casting them to dates (#17742).
default_timezone = timezone.get_default_timezone()
value = timezone.make_naive(value, default_timezone)
return value.date()
if isinstance(value, datetime.date):
return value
try:
parsed = parse_date(value)
if parsed is not None:
return parsed
except ValueError:
msg = self.error_messages['invalid_date'] % value
raise exceptions.ValidationError(msg)
msg = self.error_messages['invalid'] % value
raise exceptions.ValidationError(msg)
