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(
u"Oracle received a naive datetime (%s)"
u" 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)
if hasattr(param, 'bind_parameter'):
self.smart_str = param.bind_parameter(cursor)
else:
self.smart_str = 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, basestring) 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 __init__(self, dt):
# Accepts either a datetime or date object.
self.data = dt
self.timezone = None
if isinstance(dt, datetime.datetime):
if is_naive(dt):
self.timezone = LocalTimezone(dt)
else:
self.timezone = dt.tzinfo
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(u"SQLite received a naive datetime (%s)"
u" 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 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(u"DateTimeField received a naive datetime (%s)"
u" 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, e:
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
})
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, basestring) and pytz is not None:
try:
tz = pytz.timezone(arg)
except pytz.UnknownTimeZoneError:
return ''
else:
return ''
# Convert and prevent further conversion
result = value.astimezone(tz)
if hasattr(tz, 'normalize'):
# available for pytz time zones
result = tz.normalize(result)
# 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 _rowfactory(row, cursor):
# Cast numeric values as the appropriate Python type based upon the
# cursor description, and convert strings to unicode.
casted = []
for value, desc in zip(row, cursor.description):
if value is not None and desc[1] is Database.NUMBER:
precision, scale = desc[4:6]
if scale == -127:
if precision == 0:
# NUMBER column: decimal-precision floating point
# This will normally be an integer from a sequence,
# but it could be a decimal value.
if '.' in value:
value = decimal.Decimal(value)
else:
value = int(value)
else:
# FLOAT column: binary-precision floating point.
# This comes from FloatField columns.
value = float(value)
elif precision > 0:
# NUMBER(p,s) column: decimal-precision fixed point.
# This comes from IntField and DecimalField columns.
if scale == 0:
value = int(value)
else:
value = decimal.Decimal(value)
elif '.' in value:
# No type information. This normally comes from a
# mathematical expression in the SELECT list. Guess int
# or Decimal based on whether it has a decimal point.
value = decimal.Decimal(value)
else:
value = int(value)
# datetimes are returned as TIMESTAMP, except the results
# of "dates" queries, which are returned as DATETIME.
elif desc[1] in (Database.TIMESTAMP, Database.DATETIME):
# Confirm that dt is naive before overwriting its tzinfo.
if settings.USE_TZ and value is not None and timezone.is_naive(
value):
value = value.replace(tzinfo=timezone.utc)
elif desc[1] in (Database.STRING, Database.FIXED_CHAR,
Database.LONG_STRING):
value = to_unicode(value)
casted.append(value)
return tuple(casted)
def parse_datetime_with_timezone_support(value):
dt = parse_datetime(value)
# Confirm that dt is naive before overwriting its tzinfo.
if dt is not None and settings.USE_TZ and timezone.is_naive(dt):
dt = dt.replace(tzinfo=timezone.utc)
return dt
def get_feed(self, obj, request):
"""
Returns a feedgenerator.DefaultFeed object, fully populated, for
this feed. Raises FeedDoesNotExist for invalid parameters.
"""
current_site = get_current_site(request)
link = self.__get_dynamic_attr('link', obj)
link = add_domain(current_site.domain, link, request.is_secure())
feed = self.feed_type(
title=self.__get_dynamic_attr('title', obj),
subtitle=self.__get_dynamic_attr('subtitle', obj),
link=link,
description=self.__get_dynamic_attr('description', obj),
language=settings.LANGUAGE_CODE.decode(),
feed_url=add_domain(
current_site.domain,
self.__get_dynamic_attr('feed_url', obj) or request.path,
request.is_secure(),
),
author_name=self.__get_dynamic_attr('author_name', obj),
author_link=self.__get_dynamic_attr('author_link', obj),
author_email=self.__get_dynamic_attr('author_email', obj),
categories=self.__get_dynamic_attr('categories', obj),
feed_copyright=self.__get_dynamic_attr('feed_copyright', obj),
feed_guid=self.__get_dynamic_attr('feed_guid', obj),
ttl=self.__get_dynamic_attr('ttl', obj),
**self.feed_extra_kwargs(obj))
title_tmp = None
if self.title_template is not None:
try:
title_tmp = loader.get_template(self.title_template)
except TemplateDoesNotExist:
pass
description_tmp = None
if self.description_template is not None:
try:
description_tmp = loader.get_template(
self.description_template)
except TemplateDoesNotExist:
pass
for item in self.__get_dynamic_attr('items', obj):
if title_tmp is not None:
title = title_tmp.render(
RequestContext(request, {
'obj': item,
'site': current_site
}))
else:
title = self.__get_dynamic_attr('item_title', item)
if description_tmp is not None:
description = description_tmp.render(
RequestContext(request, {
'obj': item,
'site': current_site
}))
else:
description = self.__get_dynamic_attr('item_description', item)
link = add_domain(
current_site.domain,
self.__get_dynamic_attr('item_link', item),
request.is_secure(),
)
enc = None
enc_url = self.__get_dynamic_attr('item_enclosure_url', item)
if enc_url:
enc = feedgenerator.Enclosure(
url=smart_unicode(enc_url),
length=smart_unicode(
self.__get_dynamic_attr('item_enclosure_length',
item)),
mime_type=smart_unicode(
self.__get_dynamic_attr('item_enclosure_mime_type',
item)))
author_name = self.__get_dynamic_attr('item_author_name', item)
if author_name is not None:
author_email = self.__get_dynamic_attr('item_author_email',
item)
author_link = self.__get_dynamic_attr('item_author_link', item)
else:
author_email = author_link = None
pubdate = self.__get_dynamic_attr('item_pubdate', item)
if pubdate and is_naive(pubdate):
ltz = tzinfo.LocalTimezone(pubdate)
pubdate = pubdate.replace(tzinfo=ltz)
feed.add_item(
title=title,
link=link,
description=description,
unique_id=self.__get_dynamic_attr('item_guid', item, link),
enclosure=enc,
pubdate=pubdate,
author_name=author_name,
author_email=author_email,
author_link=author_link,
categories=self.__get_dynamic_attr('item_categories', item),
item_copyright=self.__get_dynamic_attr('item_copyright', item),
**self.item_extra_kwargs(item))
return feed
