eiru_salon_spa/views/project_service_material.xml

<?xml version="1.0" encoding="utf-8"?>
<openerp>
    <data>
        
        <!-- form view -->
        
        <record model="ir.ui.view" id="project_service_material_form">
            <field name="name">project.service.material.form</field>
            <field name="model">project.service.material</field>
            <field name="arch" type="xml">
                <form string="Materiales">
                    <group>
                        <group>
                            <field name="product_id" />
                        </group>
                        <group>
                            <field name="amount"/>
                            <field name="price"/>
                        </group>
                    </group>
                </form>
            </field>
        </record>
		
        <!-- Tree view -->
        
        <record model="ir.ui.view" id="project_service_material_tree">
            <field name="name">project.service.material.tree</field>
            <field name="model">project.service.material</field>
            <field name="arch" type="xml">
                <tree string="Materiales" editable="bottom">
                    <field name="product_id" required="1"/>
                    <field name="amount" required="1" sum="amount"/>
                    <field name="price" required="1" sum="total"/>
                </tree>
            </field>
        </record>
    </data>
</openerp>