@content
    def PATCH(self):
        data = self.checked_data(self.validator.validate_update)

        instance = self.get_one_or_404()

        instance.update(utils.dict_merge(
            self.single.serializer.serialize(instance), data
        ))

        return self.single.to_json(instance)


# TODO(enchantner): rewrite more handlers to inherit from this
# and move more common code here
Create a new volume.
dataset/ETHPy150Open openstack/fuel-web/nailgun/nailgun/api/v1/handlers/base.py/DBSingletonHandler.PATCH--crossover with--dataset/ETHPy150Open ClusterHQ/flocker/flocker/node/agents/blockdevice.py/IBlockDeviceAPI.create_volume