class sale_order(osv.osv): _inherit = 'sale.order' _order = 'date_order desc,name desc' _columns = { 'product_id': fields.related('order_line','product_id', type='many2one', relation='product.product', string='Product'), } <field name="model">sale.order</field> <field name="inherit_id" ref="sale.view_sales_order_filter" /> <field name="arch" type="xml"> <field name="name" position="after"> <field name="product_id"/> </field> </field> </record>从公司项目取下来的代码片段,没有做成模块