EDIT: Simple mistake, I inherited "mrp.view_mrp_production_workcenter_form_view_filter", when I should have inherited "mrp_operations.view_mrp_production_workcenter_form_view_filter".

I am trying to add a "group by..." for customer to Work Orders and am having some trouble. Currently I have a customer field defined on each product (many2one) that then gets translated via fields.related to the Manufacturing Order and Work Order views. This is working without issue. I am trying to sort my Work Orders by customer now using "Group By...", but for some reason my code isn't working. If someone could check it out for me I'd really appreciate it.

My  current code:

    <record id="view_workcenter_customer_domain_search" model="ir.ui.view">

        <field name="name">workcenter.customer.domain.search</field>

        <field name="model">mrp.production.workcenter.line</field>

        <field name="inherit_id" ref="mrp.view_mrp_production_workcenter_form_view_filter"/>

        <field name="arch" type="xml">

            <xpath expr="//group/filter[@string='Date']" position="after">

                    <filter string="Customer" icon="terp-go-home" domain="[]" context="{'group_by':'customer_name'}"/>

            </xpath>

        </field>

    </record>