class Order_Line(models.Model):
    _name = 'orderline.data'
    _description = "Oder details"

    product_name = fields.Selection(string="Product Name",
                                    selection=[('chain', 'Chain'), ('nackless', 'Nackless'), ('har', 'Har'),
                                               ('churi', 'Churi'), ('yearring', 'Year-Ring')], required=True, )
    weight = fields.Float(string="Weight", required=True)
    product_image = fields.Image(string="Image")
    product_quantity = fields.Integer(string="Quantity", required=True)
    making_cost = fields.Integer(string="Making cost", )
    gold_rate = fields.Float(string="Gold Rate", required=True, )
    sub_total_price = fields.Float(string="Sub Total Price", compute='gold_cost_count', readonly="1")
    create_orderline = fields.Many2one('order.order', string="Oder Line")



class PaymentLine(models.Model):
    _name = 'paymentline.data'
    _description = "Payment Details"

    total_price = fields.Integer(string="Total Price")
    advance_payment = fields.Integer(string="Advance payment")
    total_due = fields.Float(string="Total Due")
    create_paymentline = fields.Many2one('order.order', string="Payment Line")

I want to ist model field "sub_total_price" is value will be stored automatically in 2nd model field "total_price"


Can you kindly help me