golem/golem_activity_registration_payment/views/golem_activity_registration_views.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
Copyright 2018 Fabien Bourgeois <fabien@yaltik.com>

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Affero General Public License for more details.

You should have received a copy of the GNU Affero General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
-->
<odoo>
  <data>

    <!-- Form -->
    <record id="golem_activity_registration_form_inherit_payment"
      model="ir.ui.view">
      <field name="name">Activity Registration form adaptations</field>
      <field name="model">golem.activity.registration</field>
      <field name="inherit_id"
        ref="golem_activity_registration.golem_activity_registration_form" />
      <field name="arch" type="xml">
        <group name="subscription" position="after">
          <group name="invoicing" string="Invoicing">
            <field name="invoice_line_id" invisible="1" />
            <field name="currency_id" invisible="1" />
            <field name="invoice_line_price" readonly="1" />
            <field name="invoice_state" />
            <field name="invoice_id" string="Invoice" />
          </group>
        </group>
      </field>
    </record>

    <!-- Tree -->
    <record id="golem_activity_registration_state_tree_inherit_payment" model="ir.ui.view">
      <field name="name">Activity Registration State Tree adaptations</field>
      <field name="model">golem.activity.registration</field>
      <field name="inherit_id"
        ref="golem_activity_registration_state.golem_activity_registration_tree_inherit_state" />
      <field name="arch" type="xml">
        <field name="state" position="after">
          <field name="invoice_line_id" invisible="1" />
          <field name="invoice_state" string="Invoice state" />
        </field>
      </field>
    </record>

    <!-- Search -->
    <record id="golem_activity_registration_search_inherit_payment" model="ir.ui.view">
      <field name="name">Activity Registration State Search adaptations</field>
      <field name="model">golem.activity.registration</field>
      <field name="inherit_id"
        ref="golem_activity_registration_state.golem_activity_registration_search_inherit_state" />
      <field name="arch" type="xml">
        <field name="activity_id" position="after">
          <field name="invoice_id" string="Invoice" />
        </field>
        <filter name="state_canceled" position="after">
          <separator />
          <filter name="invoice_state_draft" string="Draft Invoice"
           domain="[('invoice_state', '=', 'draft')]" />
          <filter name="invoice_state_open" string="Opened Invoice"
           domain="[('invoice_state', '=', 'open')]" />
          <filter name="invoice_state_paid" string="Paid Invoice"
           domain="[('invoice_state', '=', 'paid')]" />
          <filter name="invoice_state_cancel" string="Canceled Invoice"
           domain="[('invoice_state', '=', 'cancel')]" />
        </filter>
        <filter name="group_state" position="after">
         <filter name="group_invoice_state" string="By invoice state"
           context="{'group_by': 'invoice_state'}"/>
        </filter>
      </field>
    </record>

  </data>
</odoo>