cooperative-market/purchase_order_generator/views/purchase_order_generator.xml

<?xml version="1.0" encoding="utf-8"?>
<odoo>
    <!-- views-->

    <!--tree-->
    <record id="purchase_order_generator_tree" model="ir.ui.view">
        <field name="name">purchase.order.generator.tree</field>
        <field name="model">purchase.order.generator</field>
        <field name="arch" type="xml">
            <tree>
                <field name="name"/>
                <field name="supplier_id"/>
                <field name="order_date"/>
                <field name="date_planned"/>
                <field name="total_amount"/>
            </tree>
        </field>
    </record>

    <!-- form -->
    <record id="purchase_order_generator_form" model="ir.ui.view">
        <field name="name">purchase.order.generator.form</field>
        <field name="model">purchase.order.generator</field>
        <field name="arch" type="xml">
            <form>
                <header>
                    <button type="object"
                            name="create_purchase_order"
                            string="Create Purchase Order"
                            class="oe_highlight"/>
                </header>

                <sheet>
                    <group>
                        <group>
                            <field name="supplier_id"/>
                            <field name="order_date"/>
                            <field name="date_planned"/>
                            <field name="total_amount"/>
                            <field name="generated_purchase_order_ids"
                                   invisible='1'/>
                        </group>

                        <div name="buttons" class="oe_right oe_button_box">
                            <button class="oe_inline oe_stat_button"
                                    type="object"
                                    icon="fa-shopping-cart"
                                    name="get_generated_po_action"
                                    help="Generated Purchase Orders">
                                <field string="Purchase orders"
                                       name="generated_po_count"
                                       widget="statinfo"/>
                            </button>
                        </div>

                    </group>

                    <field name="pog_line_ids"
                           context="{'cpo_seller_id': supplier_id}">
                        <tree name="order_lines" string="Order Lines"
                              editable='bottom'>
                            <field name="product_template_id"/>
                            <field name="qty_available" readonly='1'/>
                            <field name="virtual_available" readonly='1'/>
                            <field name="uom_id" readonly='1'/>
                            <field name="daily_sales" readonly='1'/>
                            <field name="stock_coverage" readonly='1'/>
                            <field name="virtual_coverage" readonly='1'/>
                            <field name="product_price" readonly='1'/>
                            <field name="uom_po_id" readonly='1'/>
                            <field name="purchase_quantity"/>
                            <field name="subtotal" readonly='1'/>
                        </tree>
                    </field>
                </sheet>


            </form>
        </field>
    </record>

    <!-- filters-->
    <record id="purchase_order_generator_filter" model="ir.ui.view">
        <field name="model">purchase.order.generator</field>
        <field name="arch" type="xml">
            <search>
                <field name="supplier_id"/>
            </search>
        </field>
    </record>

    <!-- Menu item -->

    <record id="action_purchase_order_generator" model="ir.actions.act_window">
        <field name="name">Purchase Order Generators</field>
        <field name="res_model">purchase.order.generator</field>
    </record>

    <menuitem id="purchase_order_generator"
              parent="purchase.menu_procurement_management"
              action="action_purchase_order_generator"/>

    <!-- Actions -->

    <record id="action_generate_pog" model="ir.actions.server">
        <field name="name">Generate Purchase Order</field>
        <field name="model_id" ref="model_purchase_order_generator"/>
        <field name="binding_model_id" ref="product.model_product_template"/>
        <field name="state">code</field>
        <field name="code">
            action = model.test_generate_pog()
        </field>
    </record>
</odoo>