~gemmahm4/+junk/grouping_invoices

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

            <field name="name">inherit.purchase.line.invoice</field>

            <field name="model">purchase.order.line_invoice</field>

            <field name="type">form</field>

            <field name="inherit_id" ref="purchase.view_purchase_line_invoice"/>

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

            <data>

                <footer position="before" >

                  <group col="4">

                    <field name="groupby_partner"/>

                    <newline/>

                        <field name="groupby_product" attrs="{'readonly': [('groupby_partner','=',False)]}"/>

                        <newline/>

                        <field name="period_id" domain="[('state', '=', 'draft')]" widget="selection" attrs="{'readonly': [('groupby_partner','=',False)]}"/>

                        <field name="journal_id" widget="selection" domain="[('type', '=', 'sale')]" attrs="{'readonly': [('groupby_partner','=',False)],'required':[('groupby_partner','=',True)]}"/>

                        <field name="invoice_date" attrs="{'readonly': [('groupby_partner','=',False)]}"/>

                  </group>

                </footer>

               

            </data>

            </field>

        </record>