def __set__(self, *args):
raise db.DerivedPropertyError(
'Class-key is a derived property and cannot be set.')
def __set__(self, *args):
raise db.DerivedPropertyError(
'Computed property %s cannot be set.' % self.name)
def __set__(self, model_instance, value):
raise db.DerivedPropertyError("Cannot assign to a DerivedProperty")
def __set__(self, *args):
raise db.DerivedPropertyError(
'Model-path is a derived property and cannot be set.')
