def _parse_datetime(self, dtstr):
if not dtstr:
value = timeutils.utcnow()
elif isinstance(dtstr, datetime.datetime):
value = dtstr
else:
for fmt in ["%Y-%m-%dT%H:%M:%S",
"%Y-%m-%dT%H:%M:%S.%f",
"%Y-%m-%d %H:%M:%S.%f"]:
try:
value = parse_strtime(dtstr, fmt)
break
except exception.InvalidStrTime:
pass
else:
msg = _("Datetime is in invalid format")
raise exception.InvalidStrTime(reason=msg)
# NOTE(mriedem): Instance object DateTime fields are timezone-aware
# so we have to force UTC timezone for comparing this datetime against
# instance object fields and still maintain backwards compatibility
# in the API.
if value.utcoffset() is None:
value = value.replace(tzinfo=iso8601.iso8601.Utc())
return value
def parse_strtime(dstr, fmt):
try:
return timeutils.parse_strtime(dstr, fmt)
except (TypeError, ValueError) as e:
raise exception.InvalidStrTime(reason=six.text_type(e))
