120 lines
3.2 KiB
Python
120 lines
3.2 KiB
Python
"""
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Global Django exception and warning classes.
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"""
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import logging
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from functools import reduce
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class DjangoRuntimeWarning(RuntimeWarning):
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pass
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class ObjectDoesNotExist(Exception):
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"""The requested object does not exist"""
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silent_variable_failure = True
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class MultipleObjectsReturned(Exception):
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"""The query returned multiple objects when only one was expected."""
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pass
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class SuspiciousOperation(Exception):
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"""The user did something suspicious"""
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class SuspiciousMultipartForm(SuspiciousOperation):
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"""Suspect MIME request in multipart form data"""
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pass
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class SuspiciousFileOperation(SuspiciousOperation):
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"""A Suspicious filesystem operation was attempted"""
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pass
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class DisallowedHost(SuspiciousOperation):
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"""HTTP_HOST header contains invalid value"""
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pass
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class DisallowedRedirect(SuspiciousOperation):
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"""Redirect to scheme not in allowed list"""
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pass
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class PermissionDenied(Exception):
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"""The user did not have permission to do that"""
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pass
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class ViewDoesNotExist(Exception):
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"""The requested view does not exist"""
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pass
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class MiddlewareNotUsed(Exception):
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"""This middleware is not used in this server configuration"""
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pass
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class ImproperlyConfigured(Exception):
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"""Django is somehow improperly configured"""
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pass
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class FieldError(Exception):
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"""Some kind of problem with a model field."""
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pass
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NON_FIELD_ERRORS = '__all__'
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class ValidationError(Exception):
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"""An error while validating data."""
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def __init__(self, message, code=None, params=None):
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import operator
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from django.utils.encoding import force_text
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"""
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ValidationError can be passed any object that can be printed (usually
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a string), a list of objects or a dictionary.
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"""
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if isinstance(message, dict):
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self.message_dict = message
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# Reduce each list of messages into a single list.
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message = reduce(operator.add, message.values())
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if isinstance(message, list):
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self.messages = [force_text(msg) for msg in message]
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else:
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self.code = code
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self.params = params
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message = force_text(message)
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self.messages = [message]
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def __str__(self):
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# This is needed because, without a __str__(), printing an exception
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# instance would result in this:
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# AttributeError: ValidationError instance has no attribute 'args'
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# See http://www.python.org/doc/current/tut/node10.html#handling
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if hasattr(self, 'message_dict'):
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return repr(self.message_dict)
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return repr(self.messages)
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def __repr__(self):
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if hasattr(self, 'message_dict'):
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return 'ValidationError(%s)' % repr(self.message_dict)
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return 'ValidationError(%s)' % repr(self.messages)
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def update_error_dict(self, error_dict):
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if hasattr(self, 'message_dict'):
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if error_dict:
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for k, v in self.message_dict.items():
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error_dict.setdefault(k, []).extend(v)
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else:
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error_dict = self.message_dict
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else:
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error_dict[NON_FIELD_ERRORS] = self.messages
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return error_dict
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