CakePHP - 保持在同一页面上

Question

我有一个简单的 controller 用于在表中添加一行，但如果它失败，我想留在同一页面上，但只有 flash 警告消息。

class WarehouseAddressesController{
    public function itemToAdd($id = null){
        $exists = $this->ItemsAddress->find('first', array('conditions' => array(
            'warehouse_addresses_id' => $this->request->data['WarehouseAddress']['id'],
            'items_id' => $this->request->data['Items']['itemToAdd'])));

        if($this->request->is(array('post')) && empty($exists)){
            $data = array(
                'warehouse_addresses_id' => $this->request->data['WarehouseAddress']['id'],
                'items_id' => $this->request->data['Items']['itemToAdd']
            );

            if ($this->ItemsAddress->save($data, array('validate' => 'first',))) {
                $this->Flash->success(__('This item has been successfully added to the requested address.'));
                $this->redirect($this->referer());
            }
            if(!empty($exists)){
                $this->Flash->warning(__('This item already exists on this address'));
                $this->redirect($this->referer());
            }
            else {
                $this->Flash->error(__('This item could not be added to this address. Please, try again.'));
                $this->redirect($this->referer());
            }}}}

保存项目时，它会像使用 $this->referer 一样停留在同一页面上，但是当项目存在时，它会显示错误错误：未找到 WarehouseAddressesController::itemToAdd() 的视图。 但我想留在页面上，只显示页面存在的错误。

Answer 1

我只需要添加 return $this->redirect($this->referer()); 在第一个 if 块和最后一个 if 块中。