I am working with cakePhp 3.0.I am stuck trying to either store the image 
in the database or image path in the database(either is fine).I have a form 
that collects information and an image.I am able to get the form to store 
the image on webroot but I am struggling with storing the same image into a 
database.My problem is understanding patchEntity() as opposed to what is 
more popular in cakephp saveFile(). My understanding is this saveFile() 
would save a selected form filled. I have commented out my two attempts 
just to illustrate what I have tried so far. Below is my code;


public function add()
    {
        $car = $this->Cars->newEntity();
        if ($this->request->is('post')) {
         $car = $this->Cars->patchEntity($car, $this->request->data);
        //debug($this->request->data);die();
         $now = time();
         $dir = WWW_ROOT.'files'.DS.'uploads';
         $extension = 
strtolower(pathinfo($this->request->data['user_pic_path']['name'],PATHINFO_EXTENSION));
          if(!empty($this->request->data['user_pic_path']['tmp_name'])&&
          in_array($extension,array('jpg','jpeg','png','pdf'))
          ){
              
move_uploaded_file($this->request->data['user_pic_path']['tmp_name'],
              $dir.DS . '-' . $extension
              );
              $this->request->data = array();
              //$this->Cars->save($this->request->data);
               
//$this-Cars->PatchEntity($car,$this->request->data['user_pic_path']['tmp_name']);

          }

            if ($this->Cars->save($car)) {
                $this->Flash->success(__('The car has been saved & new file 
uploaded'));
                return $this->redirect(['action' => 'index']);
            } else {
                $this->Flash->error(__('The car could not be saved. Please, try 
again.'));
            }
        }
        $this->set(compact('car'));
        $this->set('_serialize', ['car']);
    }

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