odoo owl 如何重写父类方法

当你不想修改源码，又想在控件中新增自己参数的时候，你就可以这么干

/** @odoo-module */
import { Order, Orderline } from "@point_of_sale/app/store/models";
import { patch } from "@web/core/utils/patch";

patch(Orderline.prototype, {
    getDisplayData() {
    /**Add the product id to update the image**/
        return {
            ...super.getDisplayData(),
            product_id: this.get_product().id,
            
        };
    },

    export_as_JSON() {
        return {
            ...super.export_as_JSON(),
            epc_barcode: this.epc_barcode,
            
        };
    }
});

// export class Orderline extends Order {
//     setup(_defaultObj, options) {
//         super.setup(...arguments);
//     }
// }

patch(Order.prototype, {
    set_orderline_options(orderline, options) {
        if (options.epc_barcode !== undefined) {
            orderline.epc_barcode = options.epc_barcode
        }
        super.set_orderline_options(...arguments)
        
    }
    
});

 或者这样操作

/** @odoo-module */

import { Orderline } from "@point_of_sale/app/generic_components/orderline/orderline";
import { patch } from "@web/core/utils/patch";
import { useService } from "@web/core/utils/hooks";


const itemRemoveOrder = {
    setup() {
        super.setup();
        this.numberBuffer = useService("number_buffer");
    },
    clear_button_fun() {
        this.numberBuffer.sendKey("Backspace");
        this.numberBuffer.sendKey("Backspace");
    }
};

patch(Orderline.prototype, itemRemoveOrder);