trytond-party_company/activity.xml

<?xml version="1.0"?>
<!-- This file is part of Tryton.  The COPYRIGHT file at the top level of
this repository contains the full copyright notices and license terms. -->
<tryton>
    <data depends="activity">
        <!-- activity -->
        <record model="ir.rule.group" id="rule_group_activity_activity">
            <field name="name">Activity Company Rule</field>
            <field name="model" search="[('model', '=', 'activity.activity')]"/>
            <field name="global_p" eval="True"/>
        </record>
        <record model="ir.rule" id="rule_activity_activity_companies">
            <field name="domain" eval="['OR', ('companies', 'in', Eval('companies', [])), ('companies', 'in', [])]" pyson="1"/>
            <field name="rule_group" ref="rule_group_activity_activity"/>
        </record>
    </data>
</tryton>