Hi!

You're on the right track. To show a custom field on the POS Receipt, you need to:

✅ 1. Expose the field to the POS frontend (via Python)

If your custom field is on evo.payments.session, you need to load it using the session loader. Your function might look like this:

def _loader_params_evo_payments_session(self):
    result = super()._loader_params_evo_payments_session()
    result["search_params"]["fields"].append("your_custom_field")
    return result

Replace "your_custom_field" with the actual field name from your model.

If you're calling a different function (e.g. _loader_params_pos_session), make sure it returns the needed field too.

✅ 2. Get the field into JavaScript

In your custom JS (extend models.PosModel), load the field like this:

import { PosGlobalState } from 'point_of_sale.models';
import { patch } from 'web.utils';

patch(PosGlobalState.prototype, {
    async _processData(loadedData) {
        await super._processData(...arguments);
        this.evo_field = loadedData['evo.payments.session']?.[0]?.your_custom_field;
    },
});

✅ 3. Add it to the Receipt (QWeb template)

In your inherited receipt template, add:

<t t-if="pos.evo_field">
    <div>Custom Field: <t t-esc="pos.evo_field"/></div>
</t>

Hii,

Python – Extend pos.order and Session Loader

models/pos_order.py

from odoo import models, fields

class PosOrder(models.Model):
    _inherit = 'pos.order'

    qr_code = fields.Char(string="QR Code")  # your custom field

models/pos_session.py

from odoo import models

class PosSession(models.Model):
    _inherit = ['pos.session', 'evo.payments.session']

    def _loader_params_pos_order(self):
        result = super()._loader_params_pos_order()
        result["search_params"]["fields"].append("qr_code")  # <-- This is your CUSTOM_FIELD
        return result

qr_code is the custom field you want in the receipt. Replace it with any field you need.

JavaScript – Pass Custom Field to Receipt

static/src/js/extend_order.js

/** @odoo -module **/

import { Order } from "@point_of_sale/app/store/models";
import { patch } from "@web/core/utils/patch";

patch(Order.prototype, {
    export_for_printing() {
        const result = super.export_for_printing();
        result.qr_code = this.qr_code;  // must match field in Python
        return result;
    },
});

XML – Add Field to POS Receipt

views/pos_receipt_template.xml

<odoo>
    <template id="custom_pos_receipt_qr" inherit_id="point_of_sale.pos_ticket">
        <xpath expr="//div[@class='pos-receipt-order-data']" position="inside">
            <div>
                <strong>QR Code:</strong> <t t-esc="receipt.qr_code"/>
            </div>
        </xpath>
    </template>
</odoo>

4. Manifest File

__manifest__.py

{
    "name": "POS Custom QR Receipt",
    "depends": ["point_of_sale"],
    "assets": {
        "point_of_sale._assets_pos": [
            "your_module_name/static/src/js/extend_order.js",
        ],
    },
    "data": [
        "views/pos_receipt_template.xml",
    ],
}

i hope it is usefull

1. Add the field to the POS order model (JS)

Extend the POS model using JavaScript to include the new field:

odoo.define('your_module_name.models', function (require) {

    var models = require('point_of_sale.models');

    models.load_fields('res.partner', ['customer_gstin']); // load custom field from partner

    const _super_order = models.Order.prototype;

    models.Order = models.Order.extend({

        export_for_printing: function () {

            var result = _super_order.export_for_printing.apply(this, arguments);

            result.customer_gstin = this.get_partner() ? this.get_partner().customer_gstin : '';

            return result;

        },

    });

});

2. Update the receipt template

Edit or extend the POS receipt QWeb template to include the field: 

<t t-name="PointOfSale.Ticket">

  ...

  <t t-if="receipt.customer_gstin">

    <div>GSTIN: <t t-esc="receipt.customer_gstin"/></div>

  </t>

  ...

</t>

That’s it! Now the new field will be printed on the POS receipt.

✅ Make sure your custom field exists on the partner model and is synced to the POS.

✅ Don’t forget to restart Odoo and refresh your POS screen after making changes.

Let me know if you need the same for Odoo 14, 15, 16, or 17!

Hi,

Please refer to this link to know more about customizing POS receipt.

https://www.cybrosys.com/blog/how-to-customize-pos-receipts-in-the-odoo-18

Hope it helps

def _loader_values_pos_order(self): 
    result = super()._loader_values_pos_order() result['search_params']['fields'].append('esd_qr_code')          return result

Yes, I'd like to add a new field to the POS Receipt. It's from a brand new model, so I can't inherit a pos.session method. Do you have any guide or tutorial?

This is my code so far:

from odoo import models

classPosSession(models.Model):
​_inherit = ["pos.session", "evo.payments.session"] # Evo Payments Session is my custom model

def_loader_params_evo_payments_session(self):|
"""        Loads the QR Code to the Order Receipt, calling the Evo Payments Session method        """ 
result = super().CUSTOM_FUNCTION()     
result["search_params"]["fields"].append(CUSTOM_FIELD)
return result

What should I put in CUSTOM_FUNCTION() and CUSTOM_FIELD?