Keep photo in edit form - Cakephp 3

Need Help
1

Friends, I have a form with a file field to add photos of products. If it is necessary to edit, I need to keep the photo that was registered at the first moment. I have this method for editing:

    public function edit($slug = null)
	{
		$product = $this->Products->findBySlug($slug)->firstOrFail();
		if ($this->request->is('post') || $this->request->is('put')) {
			if(!empty($this->request->data['img_product']['name'])){
				unlink(WWW_ROOT .$product->path.$product->img_produto);
				$filename = $this->request->data['img_product']['name'];
				$myext = substr(strchr($filename, "."), 1);
				$path = "img/img_products/".Security::hash($filename);
				$uploadFile = $path.$filename;
				if(move_uploaded_file($this->request->data['img_product']['tmp_name'], $uploadFile))
				{
					$this->request->data['img_product'] = $filename;
					$this->request->data['path'] = $path;
				}
			}
			
			$product = $this->Products->patchEntity($product, $this->request->getData());
			if ($this->Products->save($product)) {
				$this->Flash->success(__('Save'));

				return $this->setAction('index');
			}
		}
.
.

When I choose an image, it goes to the folder. But when I don’t choose, the img_product information is deleted from the database, and the path continues.

My question is to keep the img_product, just as it is done in the image path

My edit.ctp

              <div class="form-group row">
                <div class="col-sm-12 mb-3 mb-sm-0">
                  <small>Image</small>
                  <?= $this->Form->control('img_product', [
                  'class' => 'form-control form-input',
                  'type' => 'file',
                  'label' => false,
                  ]);?>
                </div>
              </div>

ProductTable.php

        $validator
        ->scalar('img_product')
        ->maxLength('img_product', 255)
        ->allowEmptyString('img_product');

        $validator
        ->scalar('path')
        ->maxLength('path', 255)
        ->allowEmptyString('path');

I appreciate any comments.

2

Hi, when you don’t choose file, $this->request->data[‘img_product’] is null and it saved to database. You can try set dirty property img_product if $this->request->data[‘img_product’] == null. Docs: https://api.cakephp.org/3.1/class-Cake.ORM.Entity.html#_dirty.

3

I tried this:

}else{
     $this->request->data['img_product'] == null
}

But without success! I tried changed it to: $product->img_product == null

But it removes the value of img_product in the database, but the path is maintained.

4 
}else{
     unset($this->request->data['img_product'] );
}

You can try it. Goodluck!

5

Thank you. That was it!