Source code for django.core.exceptions

Global Django exception and warning classes.
from functools import reduce
import operator

from django.utils.encoding import force_text

class DjangoRuntimeWarning(RuntimeWarning):

[docs]class ObjectDoesNotExist(Exception): """The requested object does not exist""" silent_variable_failure = True
[docs]class MultipleObjectsReturned(Exception): """The query returned multiple objects when only one was expected.""" pass
[docs]class SuspiciousOperation(Exception): """The user did something suspicious"""
class SuspiciousMultipartForm(SuspiciousOperation): """Suspect MIME request in multipart form data""" pass class SuspiciousFileOperation(SuspiciousOperation): """A Suspicious filesystem operation was attempted""" pass class DisallowedHost(SuspiciousOperation): """HTTP_HOST header contains invalid value""" pass class DisallowedRedirect(SuspiciousOperation): """Redirect to scheme not in allowed list""" pass
[docs]class PermissionDenied(Exception): """The user did not have permission to do that""" pass
[docs]class ViewDoesNotExist(Exception): """The requested view does not exist""" pass
[docs]class MiddlewareNotUsed(Exception): """This middleware is not used in this server configuration""" pass
[docs]class ImproperlyConfigured(Exception): """Django is somehow improperly configured""" pass
[docs]class FieldError(Exception): """Some kind of problem with a model field.""" pass
NON_FIELD_ERRORS = '__all__'
[docs]class ValidationError(Exception): """An error while validating data.""" def __init__(self, message, code=None, params=None): """ 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.error_dict = message elif isinstance(message, list): self.error_list = message else: self.code = code self.params = params self.message = message self.error_list = [self] @property def message_dict(self): message_dict = {} for field, messages in self.error_dict.items(): message_dict[field] = [] for message in messages: if isinstance(message, ValidationError): message_dict[field].extend(message.messages) else: message_dict[field].append(force_text(message)) return message_dict @property def messages(self): if hasattr(self, 'error_dict'): message_list = reduce(operator.add, self.error_dict.values()) else: message_list = self.error_list messages = [] for message in message_list: if isinstance(message, ValidationError): params = message.params message = message.message if params: message %= params message = force_text(message) messages.append(message) return messages def __str__(self): if hasattr(self, 'error_dict'): return repr(self.message_dict) return repr(self.messages) def __repr__(self): return 'ValidationError(%s)' % self def update_error_dict(self, error_dict): if hasattr(self, 'error_dict'): if error_dict: for k, v in self.error_dict.items(): error_dict.setdefault(k, []).extend(v) else: error_dict = self.error_dict else: error_dict[NON_FIELD_ERRORS] = self.error_list return error_dict
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