def create(cls):
        """Create a file instance.

        Note, object is only added to the database session.
        """
        obj = cls(
            id=uuid.uuid4(),
            writable=True,
            readable=False,
            size=0,
        )
        db.session.add(obj)
        return obj
Create a file instance.

        Note, object is only added to the database session.