class OrderPatient(models.Model):
    _name = 'hms.order.patient'
    _description = 'Order Patient'

    order_id = fields.Many2one('hms.order', invisible=True, readonly=True)
    service_id = fields.Many2one('hms.service', string="Service", domain='_onchange_service_id_domain')
    doctor_id = fields.Many2one('hr.employee', string="Doctor")

    # service_id_domain = fields.Char(compute='_compute_service_id_domain', store=False)
    # doctor_id_domain = fields.Char(compute='_compute_doctor_id_domain', store=False)

    @api.onchange('doctor_id')
    def _onchange_doctor_id(self):
        """Update services and clear invalid service"""
        if self.doctor_id:
            allowed_services = self.doctor_id.service_ids
            # Clear service if not valid for new doctor
            if self.service_id not in allowed_services:
                self.service_id = False
            self.service_id_domain = [('id', 'in', allowed_services.ids)]
            return {'domain': {'service_id': [('id', 'in', allowed_services.ids)]}}
        else:
            self.service_id = False
            self.service_id_domain = []
            return {'domain': {'service_id': []}}

    @api.onchange('service_id')
    def _onchange_service_id(self):
        """Update doctors and clear invalid doctor"""
        if self.service_id:
            allowed_doctors = self.env['hr.employee'].search(
                [('service_ids', 'in', self.service_id.ids)]
            )
            # Clear doctor if not valid for new service
            if self.doctor_id not in allowed_doctors:
                self.doctor_id = False
            self.doctor_id_domain = {'domain': {'doctor_id': [('id', 'in', allowed_doctors.ids)]}}
            return {'domain': {'doctor_id': [('id', 'in', allowed_doctors.ids)]}}
        else:
            self.doctor_id = False
            self.doctor_id_domain = {'domain': {'doctor_id': []}}
            return {'domain': {'doctor_id': []}}

I want to achieve the following behavior:

1. When a Doctor is selected, only the services that are allowed for that Doctor should be available for selection in the Service field. If the selected service is no longer valid for the Doctor, it should be cleared.
2. When a Service is selected, only the Doctors that are allowed to perform that Service should be available for selection in the Doctor field. If the selected Doctor no longer provides the selected Service, it should be cleared.