# 上传文件字段,要继承ir.attachment，且多对多，并在视图中加上widget="many2many_binary"。
    udate_file = fields.Many2many(‘ir.attachment‘, string=u‘上传附件‘)
    udate_file_dir = fields.Char(string="附件路径", compute="copy_file", store=True)
    demo_order_name = fields.Char(string="附件名称", compute="_value_pc", store=True)

    # 获取附件名称
    @api.depends(‘udate_file‘)
    def _value_pc(self):
        for record in self:
            for d in self.udate_file:
                record.demo_order_name = d.name


    # 将上传的文件保存到本地
    @api.depends(‘udate_file‘)
    def copy_file(self):
        # 如果上传文件对象集合有内容
        if self.udate_file:
            # 循环文件对象集合
            for d in self.udate_file:
                # 转换格式
                content_base64 = base64.b64decode(d.datas)
                dir = os.getcwd()
                # 写入文件
                with open(dir+‘/static/‘ + d.name, ‘wb‘) as f:
                    f.write(content_base64)
                # 保存附件路径
                for i in self:
                    i.udate_file_dir = dir+‘/static/‘ + d.name

                            <field name="udate_file" widget="many2many_binary"/>
                            <field name="demo_order_name"/>