product_pack/views/pack_view.xml

<?xml version="1.0" encoding="utf-8"?>
<openerp>
<data>

	<!-- Product view modification -->
	<record model="ir.ui.view" id="product_template_only_form_view">
		<field name="name">product.template.pack.form</field>
		<field name="model">product.template</field>
		<field name="inherit_id" ref="product.product_template_only_form_view" />
		<field name="arch" type="xml">
			<field name="type" position="after">
				<field name="pack" string="¿Es un paquete?"/>
				<field name="pack_price_type" attrs="{'invisible':[('pack', '=', False)], 'required':[('pack','=',True)]}" context="{'pack_price_type': pack_price_type}" string="Tipo de paquete"/>
			</field>
			<notebook position="inside">
				<page string="Receta" attrs="{'invisible': ['|', ('product_variant_count', '>', 1), ('pack', '=', False)]}">
					<field name="pack_line_ids"/>
				</page>
			</notebook>
		</field>
	</record>

	<record model="ir.ui.view" id="nan_product_pack_form">
		<field name="name">product.product.pack.form</field>
		<field name="model">product.product</field>
		<field name="inherit_id" ref="product.product_normal_form_view" />
		<field name="arch" type="xml">
			<field name="type" position="after">
				<field name="pack" string="¿Es un paquete?"/>
				<field name="pack_price_type" attrs="{'invisible':[('pack', '=', False)], 'required':[('pack','=',True)]}" context="{'pack_price_type': pack_price_type}" string="Tipo de paquete"/>
			</field>
			<notebook position="inside">
				<page string="Receta" attrs="{'invisible':[('pack', '=', False)]}">
					<field name="pack_line_ids"/>
				</page>
			</notebook>
		</field>
	</record>

	<!-- product.pack.line -->
	<record model="ir.ui.view" id="product_pack_line_form">
		<field name="name">product.pack.line.form</field>
		<field name="model">product.pack.line</field>
		<field name="type">form</field>
		<field name="arch" type="xml">
			<form string="Pack Product Line">
				<group>
					<field name="product_id"/>
					<field name="quantity"/>
					<field name="price" string="Precio"/>
					<field name="subtotal"/>
					<!-- <field name="discount" groups="sale.group_discount_per_so_line" invisible="context.get('pack_price_type') == 'fixed_price'"/> -->
				</group>
			</form>
		</field>
	</record>

	<record model="ir.ui.view" id="product_pack_line_tree">
		<field name="name">product.pack.line.tree</field>
		<field name="model">product.pack.line</field>
		<field name="type">tree</field>
		<field name="arch" type="xml">
			<tree string="Pack Product Lines" editable="bottom">
				<field name="product_id"/>
				<field name="quantity"/>
				<field name="price" string="Precio"/>
				<field name="subtotal" sum="total"/>
				<!-- <field name="discount" groups="sale.group_discount_per_so_line" invisible="context.get('pack_price_type') == 'fixed_price'"/> -->
			</tree>
		</field>
	</record>
</data>
</openerp>