<record model="ir.ui.view" id="view_inventory_form_ref">
    <field name="name">stock.inventory</field>
    <field name="model">stock.inventory</field>
    <field name="inherit_id" ref="stock.view_inventory_form"/>
    <field name="arch" type="xml">
        <xpath 
 
expr="//field[@name=‘line_ids‘]/tree/field[@name=‘product_id‘]" position="after">
             <field name="default_code"/>
        </xpath>
        <xpath expr="//field[@name=‘move_ids‘]/tree/field[@name=‘product_id‘]" position="after">
             <field name="default_code"/>
        </
 
xpath>
    </field>
</record>

繼承原生視圖 在其明細裏面加字段