在保存数据的同时从另一个控制器更新表的一个字段

Question

我有一个manage_returns_controller它有两个动作，add和index.It有一个产品下拉列表，一个股票下拉列表和添加按钮。我还有manage_products_controller包含一个现场股票。但是现在我想做以下< / p>

当我点击退货控制器的添加按钮，然后同时保存退货数据以及增加产品表中的库存。

继承人添加行动代码

function add($id = null) 
    {
       /*$this->pageTitle   =   "Edit Exchange";*/

        $storeval = $this->Store->find('all',array('conditions'=>array('is_deleted'=>0,'is_blocked'=>0)));
        //$storeval=$this->Store->findByName();
        $storevalas = array();
        foreach($storeval as $storevall)
        {
            $storevalas[$storevall['Store']['id']] = $storevall['Store']['name'];
        }

        $this->set('stock_entry_option_store', $storevalas);


        //$product_name = $this->Exchange->product->find('list');
        $storevaldd = $this->Product->find('all',array('conditions'=>array('is_deleted'=>0,'is_blocked'=>0)));
        //$storeval=$this->Store->findByName();
        $product_name = array();
        foreach($storevaldd as $storevall)
        {
            $product_name[$storevall['Product']['id']] = $storevall['Product']['name'];
        }

        $this->set('stock_entry_option_product',$product_name);

        $this->Return->id = $id;
        if(!empty($id)){
            $button_name = "Update";
            $msg_act =   "updated";
$this->pageTitle    =   "Edit Return";
        } else {
            $button_name = "Add";
            $msg_act =   "added";
$this->pageTitle    =   "Add Return";
        }
        if (empty($this->data)) 
        {
            $this->data = $this->Return->read();
        }
        else 
        {
            if ($this->Return->save($this->data)) 
            {
                $this->Session->setFlash(__('Return successfully '.$msg_act.'.',true),'default',array('class' => 'success')); 
                $this->redirect(array('controller'=>'ManageReturns','action' => 'index'));
            }
        }

        $this->set('button_name',$button_name);


    }