Create a list of new instances of the related model.

def create_many(self, records, joinings=None):
        """
        Create a list of new instances of the related model.
        """
        if joinings is None:
            joinings = []

        instances = []

        for key, record in enumerate(records):
            instances.append(self.create(record), joinings[key], False)

        self.touch_if_touching()

        return instances