Hello,

I want to make the price unit read only by default except for can edit sale price group 

I did the following but not worked 

<odoo>
    <data>
        <record id="view_order_form_inherit_discount_price_unit" model="ir.ui.view">
            <field name="name">sale.order.form.inherit.discount.price_unit</field>
            <field name="model">sale.order</field>
            <field name="inherit_id" ref="sale.view_order_form"/>
            <field name="arch" type="xml">
                <xpath expr="//field[@name='price_unit']" position="attributes">
            <attribute name="attrs">{'readonly': [('user_id', '!=', user.id), ('id', 'not in', user.groups_id.ids)]}</attribute>
        </xpath>
        <xpath expr="//field[@name='discount']" position="attributes">
            <attribute name="attrs">{'readonly': [('user_id', '!=', user.id), ('id', 'not in', user.groups_id.ids)]}</attribute>
        </xpath>
            </field>
        </record>
    </data>
</odoo>



<record id ="module_category_edit_price" model ="ir.module.category" > 
    <field name ="name" > Order Price </field> 
    <field name ="sequence" > 21 </field> 
    <field name ="parent_id " ref ="base.module_category_services" /> 
</record> 


<record id ="group_can_edit_sale_price" model ="res.groups" > 
    <field name ="name" > Can edit sale price </field> 
    <field name =" category_id" ref ="module_category_edit_price" /> 
</record>