Python 从odoo中的订单行获取产品价格？

我已经安装了一个来自Odoo store的定制模块，该模块会自动为退回的产品创建贷记单，但该模块会从产品表单中获取价格，其中可能不包括订单上的价格

我需要更改要从订单行计算的每一行的价格值，即使它是在出售或购买的

这是创建方法：

@api.multi   
def create_refund_invoice(self):   
    inv_obj = self.env['account.invoice']
    for pick in self.filtered(lambda x:x.return_type):
        type = 'in_refund' if pick.return_type == 'purchase' else 'out_refund'
        inv_lines = {'type':type, 'partner_id':pick.partner_id.id, 'invoice_line_ids':[]}
        account = pick.return_type == 'sale' and pick.partner_id.property_account_receivable_id.id or pick.partner_id.property_account_payable_id.id
        inv_lines['account_id'] = account
        inv_lines['origin'] = pick.name
        inv_lines['name'] = pick.origin
        for line in pick.move_lines:
            name = line.product_id.partner_ref
            pricelist_id = pick.partner_id.property_product_pricelist
            price = pricelist_id.get_product_price(line.product_id, 1, pick.partner_id) if pricelist_id else line.product_id.lst_price


            inv_lines['invoice_line_ids'] += [(0, None, {'product_id':line.product_id.id,
                                   'name':name,
                                   'quantity':line.quantity_done,
                                   'price_unit': price,
                                   'account_id':line.product_id.product_tmpl_id.get_product_accounts()['income'].id})]
        if inv_lines['invoice_line_ids']:
            inv_id = inv_obj.create(inv_lines)
            pick.invoice_id = inv_id.id

我该怎么办？ 我试着去设定目标

 price = line.env['purchase.order'].search([('name','=',line.group_id)]).order_line.price_unit

但它使价格等于0

任何帮助都将不胜感激

我做到了，但它只得到一条记录，如果有多条记录，我就会出错

 raise ValueError("Expected singleton: %s" % self) ValueError: Expected singleton: purchase.order.line(11362, 11363)

这就是新方法

@api.multi
def create_refund_invoice(self):
    inv_obj = self.env['account.invoice']
    for pick in self.filtered(lambda x:x.return_type):
        type = 'in_refund' if pick.return_type == 'purchase' else 'out_refund'
        inv_lines = {'type':type, 'partner_id':pick.partner_id.id, 'invoice_line_ids':[]}
        account = pick.return_type == 'sale' and pick.partner_id.property_account_receivable_id.id or pick.partner_id.property_account_payable_id.id
        inv_lines['account_id'] = account
        inv_lines['origin'] = pick.name
        inv_lines['name'] = pick.origin
        for line in pick.move_lines:
            name = line.product_id.partner_ref
            order_id = line.env['purchase.order'].search([('name', '=', line.origin)]).order_line
            price = order_id.price_unit
            inv_lines['invoice_line_ids'] += [(0, None, {
                'product_id':line.product_id.id,
                'name':name,
                'quantity':line.quantity_done,
                'price_unit': price,
                'account_id':line.product_id.product_tmpl_id.get_product_accounts()['income'].id})]
        if inv_lines['invoice_line_ids']:
            inv_id = inv_obj.create(inv_lines)
            pick.invoice_id = inv_id.id

在创建One2Many字段的值时，必须传递0,0

用您的代码替换下面的代码。这可能会解决你的问题

def create_refund_invoice(self):   
    inv_obj = self.env['account.invoice']
    for pick in self.filtered(lambda x:x.return_type):
        type = 'in_refund' if pick.return_type == 'purchase' else 'out_refund'
        inv_lines = {'type':type, 'partner_id':pick.partner_id.id, 'invoice_line_ids':[]}
        account = pick.return_type == 'sale' and pick.partner_id.property_account_receivable_id.id or pick.partner_id.property_account_payable_id.id
        inv_lines['account_id'] = account
        inv_lines['origin'] = pick.name
        inv_lines['name'] = pick.origin
        line_vals = []
        for line in pick.move_lines:
            name = line.product_id.partner_ref
            pricelist_id = pick.partner_id.property_product_pricelist
            price = pricelist_id.get_product_price(line.product_id, 1, pick.partner_id) if pricelist_id else line.product_id.lst_price
            inv_id = inv_obj.search([('origin', '=', pick.name)], limit=1)
            if not inv_id:
                inv_id = inv_obj.create(inv_lines)
            line_vals.append({
                        'product_id':line.product_id.id,
                        'name':name,
                        'quantity':line.quantity_done,
                        'price_unit': price,
                        'account_id':line.product_id.product_tmpl_id.get_product_accounts()['income'].id,
                        'invoice_id': inv_id.id
                        })
        inv_id.invoice_line_ids.create(line_vals)  

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仍然没有创建任何账单