def clean(self, value):
cleaned_data = []
errors = []
if not any(value) and self.required:
raise ValidationError(self.error_messages['required'])
max_size = max(self.size, len(value))
for index in range(max_size):
item = value[index]
try:
cleaned_data.append(self.base_field.clean(item))
except ValidationError as error:
errors.append(
prefix_validation_error(
error,
self.error_messages['item_invalid'],
code='item_invalid',
params={'nth': index + 1},
))
cleaned_data.append(None)
else:
errors.append(None)
if self.remove_trailing_nulls:
null_index = None
for i, value in reversed(list(enumerate(cleaned_data))):
if value in self.base_field.empty_values:
null_index = i
else:
break
if null_index is not None:
cleaned_data = cleaned_data[:null_index]
errors = errors[:null_index]
errors = list(filter(None, errors))
if errors:
raise ValidationError(list(chain.from_iterable(errors)))
return cleaned_data
def prefix_validation_error(error, prefix, code, params):
"""
Prefix a validation error message while maintaining the existing
validation data structure.
"""
if error.error_list == [error]:
error_params = error.params or {}
return ValidationError(
# We can't simply concatenate messages since they might require
# their associated parameters to be expressed correctly which
# is not something `format_lazy` does. For example, proxied
# ngettext calls require a count parameter and are converted
# to an empty string if they are missing it.
message=format_lazy(
'{} {}',
SimpleLazyObject(lambda: prefix % params),
SimpleLazyObject(lambda: error.message % error_params),
),
code=code,
params={
**error_params,
**params
},
)
return ValidationError([
prefix_validation_error(e, prefix, code, params)
for e in error.error_list
])
def clean(self, value):
"""
Validate every value in the given list. A value is validated against
the corresponding Field in self.fields.
For example, if this MultiValueField was instantiated with
fields=(DateField(), TimeField()), clean() would call
DateField.clean(value[0]) and TimeField.clean(value[1]).
"""
clean_data = []
errors = []
if self.disabled and not isinstance(value, list):
value = self.widget.decompress(value)
if not value or isinstance(value, (list, tuple)):
if not value or not [
v for v in value if v not in self.empty_values
]:
if self.required:
raise ValidationError(self.error_messages['required'],
code='required')
else:
return self.compress([])
else:
raise ValidationError(self.error_messages['invalid'],
code='invalid')
for i, field in enumerate(self.fields):
try:
field_value = value[i]
except IndexError:
field_value = None
if field_value in self.empty_values:
if self.require_all_fields:
# Raise a 'required' error if the MultiValueField is
# required and any field is empty.
if self.required:
raise ValidationError(self.error_messages['required'],
code='required')
elif field.required:
# Otherwise, add an 'incomplete' error to the list of
# collected errors and skip field cleaning, if a required
# field is empty.
if field.error_messages['incomplete'] not in errors:
errors.append(field.error_messages['incomplete'])
continue
try:
clean_data.append(field.clean(field_value))
except ValidationError as e:
# Collect all validation errors in a single list, which we'll
# raise at the end of clean(), rather than raising a single
# exception for the first error we encounter. Skip duplicates.
errors.extend(m for m in e.error_list if m not in errors)
if errors:
raise ValidationError(errors)
out = self.compress(clean_data)
self.validate(out)
self.run_validators(out)
return out
def validate(self, value):
"""Validate that the input is a list or tuple."""
if self.required and not value:
raise ValidationError(self.error_messages['required'],
code='required')
# Validate that each value in the value list is in self.choices.
for val in value:
if not self.valid_value(val):
raise ValidationError(
self.error_messages['invalid_choice'],
code='invalid_choice',
params={'value': val},
)
def compress(self, data_list):
if data_list:
# Raise a validation error if time or date is empty
# (possible if SplitDateTimeField has required=False).
if data_list[0] in self.empty_values:
raise ValidationError(self.error_messages['invalid_date'],
code='invalid_date')
if data_list[1] in self.empty_values:
raise ValidationError(self.error_messages['invalid_time'],
code='invalid_time')
result = datetime.datetime.combine(*data_list)
return from_current_timezone(result)
return None
def to_python(self, value):
if not value:
return []
elif not isinstance(value, (list, tuple)):
raise ValidationError(self.error_messages['invalid_list'],
code='invalid_list')
return [str(val) for val in value]
def validate(self, value):
super().validate(value)
if value in self.empty_values:
return
if not value.is_finite():
raise ValidationError(self.error_messages['invalid'],
code='invalid')
def to_python(self, value):
if value in self.empty_values:
return None
if isinstance(value, datetime.timedelta):
return value
try:
value = parse_duration(str(value))
except OverflowError:
raise ValidationError(self.error_messages['overflow'].format(
min_days=datetime.timedelta.min.days,
max_days=datetime.timedelta.max.days,
),
code='overflow')
if value is None:
raise ValidationError(self.error_messages['invalid'],
code='invalid')
return value
def add_error(self, field, error):
"""
Update the content of `self._errors`.
The `field` argument is the name of the field to which the errors
should be added. If it's None, treat the errors as NON_FIELD_ERRORS.
The `error` argument can be a single error, a list of errors, or a
dictionary that maps field names to lists of errors. An "error" can be
either a simple string or an instance of ValidationError with its
message attribute set and a "list or dictionary" can be an actual
`list` or `dict` or an instance of ValidationError with its
`error_list` or `error_dict` attribute set.
If `error` is a dictionary, the `field` argument *must* be None and
errors will be added to the fields that correspond to the keys of the
dictionary.
"""
if not isinstance(error, ValidationError):
# Normalize to ValidationError and let its constructor
# do the hard work of making sense of the input.
error = ValidationError(error)
if hasattr(error, 'error_dict'):
if field is not None:
raise TypeError(
"The argument `field` must be `None` when the `error` "
"argument contains errors for multiple fields.")
else:
error = error.error_dict
else:
error = {field or NON_FIELD_ERRORS: error.error_list}
for field, error_list in error.items():
if field not in self.errors:
if field != NON_FIELD_ERRORS and field not in self.fields:
raise ValueError("'%s' has no field named '%s'." %
(self.__class__.__name__, field))
if field == NON_FIELD_ERRORS:
self._errors[field] = self.error_class(
error_class='nonfield')
else:
self._errors[field] = self.error_class()
self._errors[field].extend(error_list)
if field in self.cleaned_data:
del self.cleaned_data[field]
def __call__(self, value):
keys = set(value)
missing_keys = self.keys - keys
if missing_keys:
raise ValidationError(
self.messages['missing_keys'],
code='missing_keys',
params={'keys': ', '.join(missing_keys)},
)
if self.strict:
extra_keys = keys - self.keys
if extra_keys:
raise ValidationError(
self.messages['extra_keys'],
code='extra_keys',
params={'keys': ', '.join(extra_keys)},
)
def to_python(self, value):
value = value.strip()
# Try to strptime against each input format.
for format in self.input_formats:
try:
return self.strptime(value, format)
except (ValueError, TypeError):
continue
raise ValidationError(self.error_messages['invalid'], code='invalid')
def validate_ipv46_address(value):
try:
validate_ipv4_address(value)
except ValidationError:
try:
validate_ipv6_address(value)
except ValidationError:
raise ValidationError(_('Enter a valid IPv4 or IPv6 address.'),
code='invalid')
def __call__(self, value):
cleaned = self.clean(value)
params = {
'limit_value': self.limit_value,
'show_value': cleaned,
'value': value
}
if self.compare(cleaned, self.limit_value):
raise ValidationError(self.message, code=self.code, params=params)
def validate(self, value):
"""Validate that the input is in self.choices."""
super().validate(value)
if value and not self.valid_value(value):
raise ValidationError(
self.error_messages['invalid_choice'],
code='invalid_choice',
params={'value': value},
)
def __call__(self, value):
"""
Validate that the input contains (or does *not* contain, if
inverse_match is True) a match for the regular expression.
"""
regex_matches = self.regex.search(str(value))
invalid_input = regex_matches if self.inverse_match else not regex_matches
if invalid_input:
raise ValidationError(self.message, code=self.code)
def full_clean(self):
"""
Clean all of self.data and populate self._errors and
self._non_form_errors.
"""
self._errors = []
self._non_form_errors = self.error_class()
empty_forms_count = 0
if not self.is_bound: # Stop further processing.
return
for i in range(0, self.total_form_count()):
form = self.forms[i]
# Empty forms are unchanged forms beyond those with initial data.
if not form.has_changed() and i >= self.initial_form_count():
empty_forms_count += 1
# Accessing errors calls full_clean() if necessary.
# _should_delete_form() requires cleaned_data.
form_errors = form.errors
if self.can_delete and self._should_delete_form(form):
continue
self._errors.append(form_errors)
try:
if (self.validate_max and
self.total_form_count() - len(self.deleted_forms) > self.max_num) or \
self.management_form.cleaned_data[TOTAL_FORM_COUNT] > self.absolute_max:
raise ValidationError(
ngettext("Please submit %d or fewer forms.",
"Please submit %d or fewer forms.", self.max_num)
% self.max_num,
code='too_many_forms',
)
if (self.validate_min
and self.total_form_count() - len(self.deleted_forms) -
empty_forms_count < self.min_num):
raise ValidationError(
ngettext("Please submit %d or more forms.",
"Please submit %d or more forms.", self.min_num) %
self.min_num,
code='too_few_forms')
# Give self.clean() a chance to do cross-form validation.
self.clean()
except ValidationError as e:
self._non_form_errors = self.error_class(e.error_list)
def validate(self, password, user=None):
if len(password) < self.min_length:
raise ValidationError(
ngettext(
"This password is too short. It must contain at least %(min_length)d character.",
"This password is too short. It must contain at least %(min_length)d characters.",
self.min_length),
code='password_too_short',
params={'min_length': self.min_length},
)
def __call__(self, value):
# Check first if the scheme is valid
scheme = value.split('://')[0].lower()
if scheme not in self.schemes:
raise ValidationError(self.message, code=self.code)
# Then check full URL
try:
super().__call__(value)
except ValidationError as e:
# Trivial case failed. Try for possible IDN domain
if value:
try:
scheme, netloc, path, query, fragment = urlsplit(value)
except ValueError: # for example, "Invalid IPv6 URL"
raise ValidationError(self.message, code=self.code)
try:
netloc = netloc.encode('idna').decode(
'ascii') # IDN -> ACE
except UnicodeError: # invalid domain part
raise e
url = urlunsplit((scheme, netloc, path, query, fragment))
super().__call__(url)
else:
raise
else:
# Now verify IPv6 in the netloc part
host_match = re.search(r'^\[(.+)\](?::\d{2,5})?$',
urlsplit(value).netloc)
if host_match:
potential_ip = host_match.groups()[0]
try:
validate_ipv6_address(potential_ip)
except ValidationError:
raise ValidationError(self.message, code=self.code)
# The maximum length of a full host name is 253 characters per RFC 1034
# section 3.1. It's defined to be 255 bytes or less, but this includes
# one byte for the length of the name and one byte for the trailing dot
# that's used to indicate absolute names in DNS.
if len(urlsplit(value).netloc) > 253:
raise ValidationError(self.message, code=self.code)
def __call__(self, value):
extension = Path(value.name).suffix[1:].lower()
if self.allowed_extensions is not None and extension not in self.allowed_extensions:
raise ValidationError(self.message,
code=self.code,
params={
'extension':
extension,
'allowed_extensions':
', '.join(self.allowed_extensions)
})
def to_python(self, value):
value = super().to_python(value)
if value in self.empty_values:
return None
if not isinstance(value, uuid.UUID):
try:
value = uuid.UUID(value)
except ValueError:
raise ValidationError(self.error_messages['invalid'],
code='invalid')
return value
def __call__(self, value):
if not value or '@' not in value:
raise ValidationError(self.message, code=self.code)
user_part, domain_part = value.rsplit('@', 1)
if not self.user_regex.match(user_part):
raise ValidationError(self.message, code=self.code)
if (domain_part not in self.domain_whitelist
and not self.validate_domain_part(domain_part)):
# Try for possible IDN domain-part
try:
domain_part = domain_part.encode('idna').decode('ascii')
except UnicodeError:
pass
else:
if self.validate_domain_part(domain_part):
return
raise ValidationError(self.message, code=self.code)
def split_url(url):
"""
Return a list of url parts via urlparse.urlsplit(), or raise
ValidationError for some malformed URLs.
"""
try:
return list(urlsplit(url))
except ValueError:
# urlparse.urlsplit can raise a ValueError with some
# misformatted URLs.
raise ValidationError(self.error_messages['invalid'],
code='invalid')
def __call__(self, value):
digit_tuple, exponent = value.as_tuple()[1:]
if exponent in {'F', 'n', 'N'}:
raise ValidationError(self.messages['invalid'])
if exponent >= 0:
# A positive exponent adds that many trailing zeros.
digits = len(digit_tuple) + exponent
decimals = 0
else:
# If the absolute value of the negative exponent is larger than the
# number of digits, then it's the same as the number of digits,
# because it'll consume all of the digits in digit_tuple and then
# add abs(exponent) - len(digit_tuple) leading zeros after the
# decimal point.
if abs(exponent) > len(digit_tuple):
digits = decimals = abs(exponent)
else:
digits = len(digit_tuple)
decimals = abs(exponent)
whole_digits = digits - decimals
if self.max_digits is not None and digits > self.max_digits:
raise ValidationError(
self.messages['max_digits'],
code='max_digits',
params={'max': self.max_digits},
)
if self.decimal_places is not None and decimals > self.decimal_places:
raise ValidationError(
self.messages['max_decimal_places'],
code='max_decimal_places',
params={'max': self.decimal_places},
)
if (self.max_digits is not None and self.decimal_places is not None
and whole_digits > (self.max_digits - self.decimal_places)):
raise ValidationError(
self.messages['max_whole_digits'],
code='max_whole_digits',
params={'max': (self.max_digits - self.decimal_places)},
)
def _simple_domain_name_validator(value):
"""
Validate that the given value contains no whitespaces to prevent common
typos.
"""
if not value:
return
checks = ((s in value) for s in string.whitespace)
if any(checks):
raise ValidationError(
_("The domain name cannot contain any spaces or tabs."),
code='invalid',
)
def run_validators(self, value):
if value in self.empty_values:
return
errors = []
for v in self.validators:
try:
v(value)
except ValidationError as e:
if hasattr(e, 'code') and e.code in self.error_messages:
e.message = self.error_messages[e.code]
errors.extend(e.error_list)
if errors:
raise ValidationError(errors)
def to_python(self, value):
if not value:
return {}
if not isinstance(value, dict):
try:
value = json.loads(value)
except json.JSONDecodeError:
raise ValidationError(
self.error_messages['invalid_json'],
code='invalid_json',
)
if not isinstance(value, dict):
raise ValidationError(
self.error_messages['invalid_format'],
code='invalid_format',
)
# Cast everything to strings for ease.
for key, val in value.items():
if val is not None:
val = str(val)
value[key] = val
return value
def to_python(self, data):
if data in self.empty_values:
return None
# UploadedFile objects should have name and size attributes.
try:
file_name = data.name
file_size = data.size
except AttributeError:
raise ValidationError(self.error_messages['invalid'],
code='invalid')
if self.max_length is not None and len(file_name) > self.max_length:
params = {'max': self.max_length, 'length': len(file_name)}
raise ValidationError(self.error_messages['max_length'],
code='max_length',
params=params)
if not file_name:
raise ValidationError(self.error_messages['invalid'],
code='invalid')
if not self.allow_empty_file and not file_size:
raise ValidationError(self.error_messages['empty'], code='empty')
return data
def _coerce(self, value):
"""
Validate that the value can be coerced to the right type (if not empty).
"""
if value == self.empty_value or value in self.empty_values:
return self.empty_value
try:
value = self.coerce(value)
except (ValueError, TypeError, ValidationError):
raise ValidationError(
self.error_messages['invalid_choice'],
code='invalid_choice',
params={'value': value},
)
return value
def run_validators(self, value):
super().run_validators(value)
errors = []
for index, item in enumerate(value):
try:
self.base_field.run_validators(item)
except ValidationError as error:
errors.append(
prefix_validation_error(
error,
prefix=self.error_messages['item_invalid'],
code='item_invalid',
params={'nth': index + 1},
))
if errors:
raise ValidationError(errors)
def to_python(self, value):
"""
Validate that float() can be called on the input. Return the result
of float() or None for empty values.
"""
value = super(IntegerField, self).to_python(value)
if value in self.empty_values:
return None
if self.localize:
value = formats.sanitize_separators(value)
try:
value = float(value)
except (ValueError, TypeError):
raise ValidationError(self.error_messages['invalid'],
code='invalid')
return value
