"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

class ValidationError(Exception):

    """An error while validating data."""

    pass