1.models.py

    # 上傳檔案欄位,要繼承ir.attachment，且多對多，並在檢視中加上widget="many2many_binary"。
    udate_file = fields.Many2many('ir.attachment', string=u'上傳附件')
    udate_file_dir = fields.Char(string="附件路徑", compute="copy_file", store=True)
    demo_order_name = fields.Char(string="附件名稱", compute="_value_pc", store=True)

    
 
# 獲取附件名稱
    @api.depends('udate_file')
    def _value_pc(self):
        for record in self:
            for d in self.udate_file:
                record.demo_order_name = d.name


    # 將上傳的檔案儲存到本地
    @api.depends('udate_file')
    def copy_file(self):
        # 如果上傳檔案物件集合有內容
        if self.udate_file:
            
 
# 迴圈檔案物件集合
            for d in self.udate_file:
                # 轉換格式
                content_base64 = base64.b64decode(d.datas)
                dir = os.getcwd()
                # 寫入檔案
                with open(dir+'/static/' + d.name, 'wb') as f:
                    f.write(content_base64)
                
 
# 儲存附件路徑
                for i in self:
                    i.udate_file_dir = dir+'/static/' + d.name

2.views.xml

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