Is it possible to open a wizard after I save a new contact in res.partner?

My code is not working, any help?

    @api.multi
    @api.constrains('unique_contacts')
    def check_unique_contacts(self):
        view_id = self.env.ref('unique_partner.test_form').id
        return {
            'name': 'Warning Message',
            'context': self.env.context,
            'view_type': 'form',
            'view_mode': 'form',
            'view_id': view_id,
            'res_model': 'res.partner',
            'type': 'ir.action.act_window',
            'target': 'new',
        }