Hi,

To prevent non-admin users in Odoo 18 from creating new products directly when adding lines to sales orders, purchase orders, or RFQs, you need to adjust their access rights. By activating developer mode, navigating to the relevant user groups (like Sales User or Purchase User), and then editing the access rights for the "Product" model (product.product), you can uncheck the "Create" and "Write" permissions. This modification ensures that these non-admin users can only see and use the "Search More" option to select existing products, while administrators, who typically retain full access, will still have the ability to create new products.

Code:

<record id="access_product_product_restrict_sales_user" model="ir.model.access">

            <field name="name">Product Product Sales User Restriction</field>

            <field name="model_id" ref="product.model_product_product"/>

            <field name="group_id" ref="sales.group_sales_user"/> <!-- Target the standard Sales User group -->

            <field name="perm_read" eval="1"/>    <!-- Users can read/view products -->

            <field name="perm_write" eval="0"/>   <!-- Users cannot write/edit products -->

            <field name="perm_create" eval="0"/>  <!-- Users cannot create new products -->

            <field name="perm_unlink" eval="0"/>  <!-- Users cannot delete products -->

        </record>

Or

Inherit the field and add option no_create

<xpath expr="//field[@name='product_id']" position="attributes">

    <attribute name="options">{'no_create': True}</attribute>

</xpath>