def check_immutable_params(cls, ref, keys=None):
"""Raise exception when disallowed parameter is stored in the keys
Check whether the ref dictionary representing a request has only
mutable parameters included. If not, raise an exception. This method
checks only root-level keys from a ref dictionary.
:param ref: a dictionary representing deserialized request to be
stored
:param keys: a set with mutable parameters. If None, use default class
attribute - _mutable_parameters
:raises exception.ImmutableAttributeError
"""
if keys is None:
keys = cls._mutable_parameters
ref_keys = set(ref.keys())
blocked_keys = ref_keys.difference(keys)
if not blocked_keys:
#No immutable parameters changed
return
exception_args = {'target': cls.__name__,
'attribute': blocked_keys.pop()}
raise exception.ImmutableAttributeError(**exception_args)
def check_immutable_params(cls, ref):
"""Raise exception when disallowed parameter is in ref.
Check whether the ref dictionary representing a request has only
mutable parameters included. If not, raise an exception. This method
checks only root-level keys from a ref dictionary.
:param ref: a dictionary representing deserialized request to be
stored
:raises: :class:`keystone.exception.ImmutableAttributeError`
"""
ref_keys = set(ref.keys())
blocked_keys = ref_keys.difference(cls._mutable_parameters)
if not blocked_keys:
# No immutable parameters changed
return
exception_args = {'target': cls.__name__,
'attributes': ', '.join(blocked_keys)}
raise exception.ImmutableAttributeError(**exception_args)