155 lines
4.4 KiB
Python
155 lines
4.4 KiB
Python
"""
|
|
Global Django exception and warning classes.
|
|
"""
|
|
from functools import reduce
|
|
import operator
|
|
|
|
from django.utils.encoding import force_text
|
|
|
|
|
|
class DjangoRuntimeWarning(RuntimeWarning):
|
|
pass
|
|
|
|
|
|
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"""
|
|
|
|
|
|
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
|
|
|
|
|
|
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):
|
|
"""An error while validating data."""
|
|
def __init__(self, message, code=None, params=None):
|
|
"""
|
|
The `message` argument can be a single error, a list of errors, or a
|
|
dictionary that maps field names to lists of errors. What we define as
|
|
an "error" can be either a simple string or an instance of
|
|
ValidationError with its message attribute set, and what we define as
|
|
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 isinstance(message, ValidationError):
|
|
if hasattr(message, 'error_dict'):
|
|
message = message.error_dict
|
|
elif not hasattr(message, 'message'):
|
|
message = message.error_list
|
|
else:
|
|
message, code, params = message.message, message.code, message.params
|
|
|
|
if isinstance(message, dict):
|
|
self.error_dict = {}
|
|
for field, messages in message.items():
|
|
if not isinstance(messages, ValidationError):
|
|
messages = ValidationError(messages)
|
|
self.error_dict[field] = messages.error_list
|
|
|
|
elif isinstance(message, list):
|
|
self.error_list = []
|
|
for message in message:
|
|
# Normalize plain strings to instances of ValidationError.
|
|
if not isinstance(message, ValidationError):
|
|
message = ValidationError(message)
|
|
self.error_list.extend(message.error_list)
|
|
|
|
else:
|
|
self.message = message
|
|
self.code = code
|
|
self.params = params
|
|
self.error_list = [self]
|
|
|
|
@property
|
|
def message_dict(self):
|
|
return dict(self)
|
|
|
|
@property
|
|
def messages(self):
|
|
if hasattr(self, 'error_dict'):
|
|
return reduce(operator.add, dict(self).values())
|
|
return list(self)
|
|
|
|
def update_error_dict(self, error_dict):
|
|
if hasattr(self, 'error_dict'):
|
|
if error_dict:
|
|
for field, errors in self.error_dict.items():
|
|
error_dict.setdefault(field, []).extend(errors)
|
|
else:
|
|
error_dict = self.error_dict
|
|
else:
|
|
error_dict[NON_FIELD_ERRORS] = self.error_list
|
|
return error_dict
|
|
|
|
def __iter__(self):
|
|
if hasattr(self, 'error_dict'):
|
|
for field, errors in self.error_dict.items():
|
|
yield field, list(ValidationError(errors))
|
|
else:
|
|
for error in self.error_list:
|
|
message = error.message
|
|
if error.params:
|
|
message %= error.params
|
|
yield force_text(message)
|
|
|
|
def __str__(self):
|
|
if hasattr(self, 'error_dict'):
|
|
return repr(dict(self))
|
|
return repr(list(self))
|
|
|
|
def __repr__(self):
|
|
return 'ValidationError(%s)' % self
|