I have a method schedule_emails that gets called via a server action. In it I'm trying to create an instance of sale.order_email.scheduled_email however it's raising an exceptin saying

old_api() takes at least 3 arguments (2 given)

Looking at openerp/api.py it seems like there's a wrapper that expects self.__dict__ to have a _ids attribute for it to call the new v8 api which presumably would work. It's not clear to me what I've failed to do, to call create on the model. My model:

class sales_order_email_field(osv.Model):
    _name = 'sale.order'
    _inherit = 'sale.order'
    _columns = {
        'email_chain': fields.many2one(
            'sale.order_email.collection',
            'Email Chain',
            required=False
        ),
        'scheduling_done': fields.boolean()
    }

    def schedule_emails(self):
        model = self.pool.get('sale.order_email.scheduled_email')
        model.create({
            'order_id': self.id,
            'send_at': datetime.utcnow(),
            'subject': 'Auto Test',
            'html_body': "HI"
        })