def keys_to_text(self, models):
        if(not is_list_type(models)):
            models = [models]
        return unicode(",".join([str(model.key()) for model in models]))
Returns a string of text of the keys of the given models (may be
dataset/ETHPy150Open jahlborn/appengine-rest-server/src/main/python/rest/__init__.py/Dispatcher.keys_to_text