def deconvert(self, value):
'''Changes a stored Reference to its Model'''
if value is None: return None
dict = yaml.load(value)
assert "id" in dict and "keyspace" in dict and "kind" in dict, "Homer cannot load an invalid reference"
clasz = MetaModel.discover(dict["kind"])
return MetaModel(clasz).read(dict["id"])
def validate(self, value):
'''Makes sure you can only set a Model or a Key that is complete on a Reference'''
if self.empty(value):
return None
if isinstance(self.clasz, str):
found = MetaModel.discover(self.clasz)
if found: self.clasz = found
if not isinstance(value, (self.clasz, Model)):
raise BadValueError("Value: {0} must be an instance of {1}".format(value, self.clasz))
value.validate() #Finally validate the model then return it.
return value