odoo16/addons/l10n_ch/views/account_invoice_view.xml

<?xml version="1.0" encoding="utf-8"?>
<odoo>
    <data>
        <record id="isr_invoice_form" model="ir.ui.view">
            <field name="name">l10n_ch.account.invoice.form</field>
            <field name="model">account.move</field>
            <field name="inherit_id" ref="account.view_move_form"/>
            <field name="arch" type="xml">
                <xpath expr="//field[@name='is_move_sent']" position="after">
                    <field name="l10n_ch_isr_sent" invisible="1"/>
                    <field name="l10n_ch_currency_name" invisible="1" readonly="1"/>
                    <field name="l10n_ch_is_qr_valid" invisible="1"/>
                </xpath>
                <header position="after">
                    <field name="l10n_ch_isr_needs_fixing" invisible="1"/>
                    <div groups="account.group_account_invoice" class="alert alert-warning" role="alert" style="margin-bottom:0px;" attrs="{'invisible': [('l10n_ch_isr_needs_fixing', '=', False)]}">
                        Please fill in a correct ISR reference in the payment reference.  The banks will refuse your payment file otherwise.
                    </div>
                </header>
            </field>
        </record>

        <record id="isr_invoice_search_view" model="ir.ui.view">
            <field name="name">l10n_ch.invoice.select</field>
            <field name="model">account.move</field>
            <field name="inherit_id" ref="account.view_account_invoice_filter"/>
            <field name="mode">primary</field>
            <field name="arch" type="xml">
                <xpath expr="//search" position="inside">
                    <field name="l10n_ch_isr_number" string="ISR reference number"/>
                </xpath>
            </field>
        </record>

        <!--Overridden action (and primary child view), so the filter are only
        available for customer invoices-->
        <record id="account.action_move_out_invoice_type" model="ir.actions.act_window">
            <field name="name">Customer Invoices</field>
            <field name="res_model">account.move</field>
            <field name="search_view_id" ref="isr_invoice_search_view"/>
        </record>

        <record id="l10n_ch_qr_server_action" model="ir.actions.server">
            <field name="name">Print QR Invoices</field>
            <field name="model_id" ref="account.model_account_move"/>
            <field name="binding_model_id" ref="account.model_account_move"/>
            <field name="binding_view_types">list</field>
            <field name="state">code</field>
            <field name="code">
if records:
    action = records.l10n_ch_action_print_qr()
            </field>
        </record>
    </data>
</odoo>