<?xml version="1.0" encoding="UTF-8" ?>
<odoo>
    <record id="purchase_order_view_form_inherit" model="ir.ui.view">
        <field name="name">purchase.order.form.inherit</field>
        <field name="model">purchase.order</field>
        <field name="inherit_id" ref="purchase.purchase_order_form" />
        <field name="arch" type="xml">
            <xpath
                expr="//page[@name='products']/field[@name='order_line']/tree/field[@name='price_unit']"
                position="before"
            >
                <field name="is_promotion" optional="hide" />
            </xpath>
            <xpath
                expr="//page[@name='products']/field[@name='order_line']/form/group/group/field[@name='price_unit']"
                position="before"
            >
              <field name="is_promotion" optional="hide" />
          </xpath>
        </field>
    </record>
</odoo>
