Template

def accept(self):
        #if self.state in ['new', 'refused']:
        config = self.env['ninas.student.config'].search([], limit=1)
        mail_obj = self.env['mail.mail']
        if config.email_template_acceptance_id:
            values = config.email_template_acceptance_id.generate_email(self.id)
            mail = mail_obj.create(values)
            if mail:
                mail.send()
            self.state = 'accepted'
        else:
            raise Warning('You must set acceptance email!')