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Unable to show value of product attribute of type file in magento2 backend

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Unable to show value of product attribute of type file in magento2 backend

Feature request from razbakov, posted on GitHub Oct 14, 2016

As Administrator I want to be able to upload files for each products in order to show link on frontend.


Magento 2.1

Steps to reproduce

I created upgrade script to create attribute with this properties:

'type' => 'varchar',
'input' => 'file',
'label' => 'Datasheet',
'required' => false,
'visible_on_front' => true,
'backend' => 'My\Module\Model\Product\Attribute\Backend\Datasheet'

Here is my backend model:


namespace My\Module\Model\Product\Attribute\Backend;

use Magento\Framework\App\Filesystem\DirectoryList;

class Datasheet extends \Magento\Eav\Model\Entity\Attribute\Backend\AbstractBackend
    const MEDIA_SUBFOLDER = 'datasheet';

    protected $_uploaderFactory;
    protected $_filesystem;
    protected $_fileUploaderFactory;
    protected $_logger;

     * Construct
     * @param \Psr\Log\LoggerInterface $logger
     * @param \Magento\Framework\Filesystem $filesystem
     * @param \Magento\Framework\File\UploaderFactory $uploaderFactory
    public function __construct(
        \Psr\Log\LoggerInterface $logger,
        \Magento\Framework\Filesystem $filesystem,
        \Magento\Framework\File\UploaderFactory $uploaderFactory
    ) {
        $this->_filesystem = $filesystem;
        $this->_uploaderFactory = $uploaderFactory;
        $this->_logger = $logger;

    public function afterSave($object)
        $attributeName = $this->getAttribute()->getName();
        $fileName = $this->uploadFileAndGetName($attributeName, $this->_filesystem->getDirectoryWrite(DirectoryList::MEDIA)->getAbsolutePath(self::MEDIA_SUBFOLDER));

        if ($fileName) {
            $object->setData($attributeName, $fileName);
            $this->getAttribute()->getEntity()->saveAttribute($object, $attributeName);

        return $this;

    public function uploadFileAndGetName($input, $destinationFolder)
        try {
            $uploader = $this->_uploaderFactory->create(array('fileId' => 'product['.$input.']'));

            return $uploader->getUploadedFileName();
        } catch (\Exception $e) {
            if ($e->getCode() != \Magento\Framework\File\Uploader::TMP_NAME_EMPTY) {
                throw new \FrameworkException($e->getMessage());

        return '';

Question on Stackoverflow:


Expected result

Attribute value is shown in backend.

Actual result

Attribute is shown in backend and saves value in database. Attribute value is not shown in backend.

1 Comment
Not applicable

Comment from razbakov, posted on GitHub Oct 18, 2016

in vendor/magento/module-ui/view/base/web/templates/form/element/media.html there is only uploader and no view and delete button:

 * Copyright © 2016 Magento. All rights reserved.
 * See COPYING.txt for license details.
<input class="admin__control-file" type="file" data-bind="
    hasFocus: focused,
    attr: {
        name: inputName,
        placeholder: placeholder,
        'aria-describedby': noticeId,
        id: uid,
        disabled: disabled,
        form: formId