django1/django/core/exceptions.py

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"Global Django exceptions"
class ObjectDoesNotExist(Exception):
"The requested object does not exist"
silent_variable_failure = True
class MultipleObjectsReturned(Exception):
"The query returned multiple objects when only one was expected."
pass
class SuspiciousOperation(Exception):
"The user did something suspicious"
pass
class PermissionDenied(Exception):
"The user did not have permission to do that"
pass
class ViewDoesNotExist(Exception):
"The requested view does not exist"
pass
class MiddlewareNotUsed(Exception):
"This middleware is not used in this server configuration"
pass
class ImproperlyConfigured(Exception):
"Django is somehow improperly configured"
pass
class FieldError(Exception):
"""Some kind of problem with a model field."""
pass
NON_FIELD_ERRORS = '__all__'
class ValidationError(Exception):
Removed oldforms, validators, and related code: * Removed `Manipulator`, `AutomaticManipulator`, and related classes. * Removed oldforms specific bits from model fields: * Removed `validator_list` and `core` arguments from constructors. * Removed the methods: * `get_manipulator_field_names` * `get_manipulator_field_objs` * `get_manipulator_fields` * `get_manipulator_new_data` * `prepare_field_objs_and_params` * `get_follow` * Renamed `flatten_data` method to `value_to_string` for better alignment with its use by the serialization framework, which was the only remaining code using `flatten_data`. * Removed oldforms methods from `django.db.models.Options` class: `get_followed_related_objects`, `get_data_holders`, `get_follow`, and `has_field_type`. * Removed oldforms-admin specific options from `django.db.models.fields.related` classes: `num_in_admin`, `min_num_in_admin`, `max_num_in_admin`, `num_extra_on_change`, and `edit_inline`. * Serialization framework * `Serializer.get_string_value` now calls the model fields' renamed `value_to_string` methods. * Removed a special-casing of `models.DateTimeField` in `core.serializers.base.Serializer.get_string_value` that's handled by `django.db.models.fields.DateTimeField.value_to_string`. * Removed `django.core.validators`: * Moved `ValidationError` exception to `django.core.exceptions`. * For the couple places that were using validators, brought over the necessary code to maintain the same functionality. * Introduced a SlugField form field for validation and to compliment the SlugField model field (refs #8040). * Removed an oldforms-style model creation hack (refs #2160). git-svn-id: http://code.djangoproject.com/svn/django/trunk@8616 bcc190cf-cafb-0310-a4f2-bffc1f526a37
2008-08-27 15:19:44 +08:00
"""An error while validating data."""
def __init__(self, message, code=None, params=None):
import operator
from django.utils.encoding import force_unicode
"""
ValidationError can be passed any object that can be printed (usually
a string), a list of objects or a dictionary.
"""
if isinstance(message, dict):
self.message_dict = message
# Reduce each list of messages into a single list.
message = reduce(operator.add, message.values())
if isinstance(message, list):
self.messages = [force_unicode(msg) for msg in message]
else:
self.code = code
self.params = params
message = force_unicode(message)
self.messages = [message]
def __str__(self):
# This is needed because, without a __str__(), printing an exception
# instance would result in this:
# AttributeError: ValidationError instance has no attribute 'args'
# See http://www.python.org/doc/current/tut/node10.html#handling
if hasattr(self, 'message_dict'):
return repr(self.message_dict)
return repr(self.messages)
def __repr__(self):
if hasattr(self, 'message_dict'):
return 'ValidationError(%s)' % repr(self.message_dict)
return 'ValidationError(%s)' % repr(self.messages)
def update_error_dict(self, error_dict):
if hasattr(self, 'message_dict'):
if error_dict:
for k, v in self.message_dict.items():
error_dict.setdefault(k, []).extend(v)
else:
error_dict = self.message_dict
else:
error_dict[NON_FIELD_ERRORS] = self.messages
return error_dict