def __init__(self, param, cursor, strings_only=False): # With raw SQL queries, datetimes can reach this function # without being converted by DateTimeField.get_db_prep_value. if settings.USE_TZ and isinstance(param, datetime.datetime): if timezone.is_naive(param): warnings.warn("Oracle received a naive datetime (%s)" " while time zone support is active." % param, RuntimeWarning) default_timezone = timezone.get_default_timezone() param = timezone.make_aware(param, default_timezone) param = param.astimezone(timezone.utc).replace(tzinfo=None) # Oracle doesn't recognize True and False correctly in Python 3. # The conversion done below works both in 2 and 3. if param is True: param = "1" elif param is False: param = "0" if hasattr(param, 'bind_parameter'): self.force_bytes = param.bind_parameter(cursor) else: self.force_bytes = convert_unicode(param, cursor.charset, strings_only) if hasattr(param, 'input_size'): # If parameter has `input_size` attribute, use that. self.input_size = param.input_size elif isinstance(param, six.string_types) and len(param) > 4000: # Mark any string param greater than 4000 characters as a CLOB. self.input_size = Database.CLOB else: self.input_size = None
def adapt_datetime_with_timezone_support(value, conv): # Equivalent to DateTimeField.get_db_prep_value. Used only by raw SQL. if settings.USE_TZ: if timezone.is_naive(value): warnings.warn("SQLite received a naive datetime (%s)" " while time zone support is active." % value, RuntimeWarning) default_timezone = timezone.get_default_timezone() value = timezone.make_aware(value, default_timezone) value = value.astimezone(timezone.utc).replace(tzinfo=None) return Thing2Literal(value.strftime("%Y-%m-%d %H:%M:%S"), conv)
def _make_date_lookup_arg(self, value): """ Convert a date into a datetime when the date field is a DateTimeField. When time zone support is enabled, `date` is assumed to be in the current time zone, so that displayed items are consistent with the URL. """ if self.uses_datetime_field: value = datetime.datetime.combine(value, datetime.time.min) if settings.USE_TZ: value = timezone.make_aware(value, timezone.get_current_timezone()) return value
def get_prep_value(self, value): value = self.to_python(value) if value is not None and settings.USE_TZ and timezone.is_naive(value): # For backwards compatibility, interpret naive datetimes in local # time. This won't work during DST change, but we can't do much # about it, so we let the exceptions percolate up the call stack. warnings.warn("DateTimeField received a naive datetime (%s)" " while time zone support is active." % value, RuntimeWarning) default_timezone = timezone.get_default_timezone() value = timezone.make_aware(value, default_timezone) return value
def from_current_timezone(value): """ When time zone support is enabled, convert naive datetimes entered in the current time zone to aware datetimes. """ if settings.USE_TZ and value is not None and timezone.is_naive(value): current_timezone = timezone.get_current_timezone() try: return timezone.make_aware(value, current_timezone) except Exception: raise ValidationError(_('%(datetime)s couldn\'t be interpreted ' 'in time zone %(current_timezone)s; it ' 'may be ambiguous or it may not exist.') % {'datetime': value, 'current_timezone': current_timezone}) return value
def do_timezone(value, arg): """ Converts a datetime to local time in a given time zone. The argument must be an instance of a tzinfo subclass or a time zone name. If it is a time zone name, pytz is required. Naive datetimes are assumed to be in local time in the default time zone. """ if not isinstance(value, datetime): return '' # Obtain a timezone-aware datetime try: if timezone.is_naive(value): default_timezone = timezone.get_default_timezone() value = timezone.make_aware(value, default_timezone) # Filters must never raise exceptions, and pytz' exceptions inherit # Exception directly, not a specific subclass. So catch everything. except Exception: return '' # Obtain a tzinfo instance if isinstance(arg, tzinfo): tz = arg elif isinstance(arg, six.string_types) and pytz is not None: try: tz = pytz.timezone(arg) except pytz.UnknownTimeZoneError: return '' else: return '' result = timezone.localtime(value, tz) # HACK: the convert_to_local_time flag will prevent # automatic conversion of the value to local time. result = datetimeobject(result.year, result.month, result.day, result.hour, result.minute, result.second, result.microsecond, result.tzinfo) result.convert_to_local_time = False return result
def to_python(self, value): if value is None: return value if isinstance(value, datetime.datetime): return value if isinstance(value, datetime.date): value = datetime.datetime(value.year, value.month, value.day) if settings.USE_TZ: # For backwards compatibility, interpret naive datetimes in # local time. This won't work during DST change, but we can't # do much about it, so we let the exceptions percolate up the # call stack. warnings.warn("DateTimeField received a naive datetime (%s)" " while time zone support is active." % value, RuntimeWarning) default_timezone = timezone.get_default_timezone() value = timezone.make_aware(value, default_timezone) return value try: parsed = parse_datetime(value) if parsed is not None: return parsed except ValueError: msg = self.error_messages['invalid_datetime'] % value raise exceptions.ValidationError(msg) try: parsed = parse_date(value) if parsed is not None: return datetime.datetime(parsed.year, parsed.month, parsed.day) except ValueError: msg = self.error_messages['invalid_date'] % value raise exceptions.ValidationError(msg) msg = self.error_messages['invalid'] % value raise exceptions.ValidationError(msg)