如何在SQL Server上上传图像并获取该图像

Question

这是我用于将图像上传到SQL Server的方法

public function add()
   {

    $category = $this->Categories->newEntity();
    if ($this->request->is('post')) {
        if(!empty($this->request->getData['image']['name'])){

            $fileName = $this->request->getData['image']['name'];

            $uploadPath = 'img/';
            $uploadFile = $uploadPath.$fileName;
            if($move_uploaded_file($this->request->getData['image']['tmp_name'],$uploadFile)){
                $this->request->getData['image']=$fileName;
            }
        }

        $category = $this->Categories->patchEntity($category, $this->request->getData());
        if ($this->Categories->save($category)) {
            //$this->Flash->success(__('The category has been saved.'));

            return $this->redirect(['controller' => 'users','action' => 'index']);
        }
       // $this->Flash->error(__('The category could not be saved. Please, try again.'));
    }
    $this->set(compact('category'));
}

在add.ctp中，代码为

<?= $this->Form->create($category,array('type'=> 'file')); ?>

所以错误是提供的值无效，请帮忙