这个功能主要用于销售订单的反流程，比如采购、销售审核了订单，但这时你要申请修改，

修改的详细就要记录，提交去审核，采购、销售经理才知道你改了什么地方。

难点：

1. 你设置了一个字段记录销售单申请前核心字段的信息，用什么方式存

2. 当销售员在改单后，保存时，同时要对比改动了什么地方做记录，这里人强制刷缓存

否则在删除了销售明细时，你做记录时就报错，One of the documents you are trying to access has been deleted … 这是缓存引起的，若不记录，修改保存记录时，系统会自动刷新，可是保存的同时，你还要做记录修改详细，此时一个动作还没有完成，就无法自动刷新缓存

效果图：

基于反流程比较复杂，这里只讲如何保存修改记录

设置字段

class SaleOrder(models.Model):     _inherit = 'sale.order'

apply_modify_old = fields.Text(string='Apply Modify Old', readonly=True)

apply_modify_detail = fields.Text(string='Apply Modify Detail',readonly=True)

写提出申请时记录初始记录

@api.one def action_apply_modify_cancel(self):      self.is_apply_modify = True      if self.apply_type =='modify' and self.apply_is_refused == False:          apply_modify_old ={
               'name':self.name,              'partner_id': self.partner_id.id,              'partner_shipping_id':self.partner_shipping_id.id,              'date_order':self.date_order,              'pricelist_id':self.pricelist_id.id,              'order_policy':self.order_policy,              'picking_policy': self.picking_policy,          }          if self.order_line:              line_dict={}              for line in self.order_line:                  line_dict[line.id] = {
                           'product_id': line.product_id.id,                          'price_unit':line.price_unit,                          'product_uom':line.product_uom.id,                          'product_uom_qty':line.product_uom_qty,                          'lot_id':line.lot_id.id,                          'unlimited_dis':line.unlimited_dis,                          'special_dis':line.special_dis,                          'th_weight':line.th_weight                          }              apply_modify_old['order_line'] = line_dict          self.apply_modify_old =json.dumps(apply_modify_old)

我这里把字典转为json放在数据中

下面给出销售员修改订单时方法记录：

def update_apply_modify_detail(self):      values = {}      apply_modify_detail = ''      order_policy_zh={
  'prepaid':u'基于发货前','manual':u'基于销售订单'}      picking_policy_zh = {
  'one': u'整批发货', 'direct': u'分批发货'}      old= self.apply_modify_old and json.loads(self.apply_modify_old) or None      if old:          if old.get('name') and old.get('name') !=self.name:              apply_modify_detail += '销售订单:' + old.get('name') + ' -> ' + self.name + '\r\n'          if old.get('partner_id') and old.get('partner_id') !=self.partner_id.id:              apply_modify_detail += '客户:' + self.env['res.partner'].browse(                  old.get('partner_id')).name_get()[0][1] + ' -> ' + self.partner_id.name_get()[0][1]+ '\r\n'          if old.get('partner_shipping_id') and old.get('partner_shipping_id') !=self.partner_shipping_id.id:              apply_modify_detail += '发货地址:' + self.env['res.partner'].browse(                  old.get('partner_shipping_id')).name_get()[0][1] + ' -> ' + self.partner_shipping_id.name_get()[0][1]+ '\r\n'          if old.get('date_order') and old.get('date_order') !=self.date_order:              apply_modify_detail += '订单日期:' + old.get('date_order')+ ' -> ' + self.date_order + '\r\n'          if old.get('pricelist_id') and old.get('pricelist_id') !=self.pricelist_id.id:              apply_modify_detail += '价格表:' + self.env['product.pricelist'].browse(                  old.get('pricelist_id')).name_get()[0][1] + ' -> ' + self.pricelist_id.name_get()[0][1] + '\r\n'          if old.get('order_policy') and old.get('order_policy') !=self.order_policy:              apply_modify_detail += '开票策略:' + order_policy_zh.get(                  old.get('order_policy'))+ ' -> ' + order_policy_zh.get(self.order_policy) + '\r\n'          if old.get('picking_policy') and old.get('picking_policy') !=self.picking_policy:              apply_modify_detail += '发货策略:' + picking_policy_zh.get(                  old.get('picking_policy'))+ ' -> ' + picking_policy_zh.get(self.picking_policy) + '\r\n'          order_line_old = old.get('order_line') and  old.get('order_line') or {}          line_modify = ''          if self.order_line:              for line in self.order_line:                  if order_line_old.get(str(line.id)):                      modify=False                      old_line = order_line_old.get(str(line.id))                      if line.product_id.id != old_line.get('product_id'):                          line_modify += "修改明细：" +str(line.id) +'[' + line.product_id.name_get()[0][1] + ']:'                          line_modify += " | 产品："+ self.env['product.product'].browse(old_line.get('product_id')).name_get()[0][1]+' -> '+line.product_id.name_get()[0][1]                          modify = True                      if line.price_unit != old_line.get('price_unit'):                          if not modify:                              line_modify += "修改明细：" + str(line.id) + '[' + line.product_id.name_get()[0][1] + ']:'                          line_modify += " | 单价：" + str(old_line.get('price_unit')) + ' -> ' + str(line.price_unit)                          modify = True                      if line.product_uom.id != old_line.get('product_uom'):                          if not modify:                              line_modify += "修改明细：" + str(line.id) + '[' + line.product_id.name_get()[0][1] + ']:'                          line_modify += " | 计量单位：" + self.env['product.uom'].browse(old_line.get(                              'product_uom')).name_get()[0][1] + ' -> ' + line.product_uom.name_get()[0][1]                          modify = True                      if line.product_uom_qty != old_line.get('product_uom_qty'):                          if not modify:                              line_modify += "修改明细：" + str(line.id) + '[' + line.product_id.name_get()[0][1] + ']:'                          line_modify += " | 数量：" + str(old_line.get('product_uom_qty')) + ' -> ' + str(line.product_uom_qty)                          modify = True                      if line.lot_id.id != old_line.get('lot_id'):                          if not modify:                              line_modify += "修改明细：" + str(line.id) + '[' + line.product_id.name_get()[0][1] + ']:'                          line_modify += " | 序列号：" + self.env['stock.production.lot'].browse(old_line.get(                              'lot_id')).name_get()[0][1] + ' -> ' + line.lot_id.name_get()[0][1]                          modify = True                      if line.unlimited_dis != old_line.get('unlimited_dis'):                          if not modify:                              line_modify += "修改明细：" + str(line.id) + '[' + line.product_id.name_get()[0][1] + ']:'                          line_modify += " | 突破限价：" + str(old_line.get('unlimited_dis')) + ' -> ' + str(line.unlimited_dis)                          modify = True                      if line.special_dis != old_line.get('special_dis'):                          if not modify:                              line_modify += "修改明细：" + str(line.id) + '[' + line.product_id.name_get()[0][1] + ']:'                          line_modify += " | 特殊折扣：" + str(old_line.get('special_dis')) + ' -> ' + str(line.special_dis)                          modify = True                      if line.th_weight != old_line.get('th_weight'):                          if not modify:                              line_modify += "修改明细：" + str(line.id) + '[' + line.product_id.name_get()[0][1] + ']:'                          line_modify += " | 重量：" + str(old_line.get('th_weight')) + ' -> ' + str(line.th_weight)                      if modify:                          line_modify += '\r\n'                      order_line_old.pop(str(line.id))                  else:                      line_modify += "增加明细：" + str(line.id) + '[' + line.product_id.name_get()[0][1] + ']:' + \                                     " 单价："+str(line.price_unit)+" 数量：" +str(line.product_uom_qty)+'\r\n'          if order_line_old:              for key,val in order_line_old.items():                  product=self.env['product.product'].browse(val.get('product_id'))                  line_modify += "删除明细：" + str(key)+'[' + product.name_get()[0][1] +']:'+ " 单价："+str(val.get('price_unit'))+" 数量：" +str(val.get('product_uom_qty'))+'\r\n'          if line_modify:              apply_modify_detail += line_modify      values['apply_modify_detail_flag']=1      values['apply_modify_detail'] = apply_modify_detail      if values:          self.write(values) @api.one def write(self, vals):      if vals.get('apply_modify_detail_flag') ==1:          apply_modify_detail_flag=1          vals.pop('apply_modify_detail_flag')      else:          apply_modify_detail_flag=0      res = super(SaleOrder, self).write(vals)      self.refresh()      if not apply_modify_detail_flag and self.is_apply_modify and  self.apply_type == 'modify':          self.update_apply_modify_detail()      return res

重点要说明

1. self.refresh() 这个一定要加，否则删除销售订单明细，做记录报错，但你增加或修改时不报错，会让你摸不着头脑。它的功能是刷出缓存。让res = super(SaleOrder, self).write(vals) 这一句彻底完成，否则要等 write 方法全部完成，才完成，

2. res = super(SaleOrder, self).write(vals) 前面的那几句判断也很重要，若不设定，会让write方法进入死循环。