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Magento 2 Backend : simple technique for upload image coming from edit form

Magento 2 allow you to add custom field form as type image , for example when you click in edit link inisde grid you have edit page you can add from fiedl :

  1.  
  2. $fieldset->addField(
  3. 'image',
  4. 'image',
  5. [
  6. 'title' => __('Image'),
  7. 'label' => __('Image'),
  8. 'name' => 'image',
  9. 'note' => 'Allow image type: jpg, jpeg, gif, png',
  10. ]
  11. );
  12.  
  13.  


So now you have your field , you can use your controller to save the image inside media , now inject (\Magento\Framework\Image\AdapterFactory $adapterFactory,\Magento\MediaStorage\Model\File\UploaderFactory $uploader):

  1.  
  2. /**
  3. * @var \Magento\Framework\Image\AdapterFactory
  4. */
  5. protected $adapterFactory;
  6. /**
  7. * @var \Magento\MediaStorage\Model\File\UploaderFactory
  8. */
  9. protected $uploader;
  10. /**
  11. * @var \Magento\Framework\Filesystem
  12. */
  13. protected $filesystem;
  14. /**
  15. * @var \Magento\Framework\Stdlib\DateTime\TimezoneInterface
  16. */
  17. protected $timezoneInterface;
  18. public function __construct(Action\Context $context,\Magento\Framework\Image\AdapterFactory $adapterFactory,\Magento\MediaStorage\Model\File\UploaderFactory $uploader,\Magento\Framework\Filesystem $filesystem)
  19. {
  20. $this->adapterFactory = $adapterFactory;
  21. $this->uploader = $uploader;
  22. $this->filesystem = $filesystem;
  23. parent::__construct($context);
  24. }
  25.  
  26.  

inisde your execute() method :
  1.  
  2. /**
  3. * Save action
  4. *
  5. * @return \Magento\Framework\Controller\ResultInterface
  6. */
  7. public function execute()
  8. {
  9. ............
  10. //start block upload image
  11. if (isset($_FILES['image']) && isset($_FILES['image']['name']) && strlen($_FILES['image']['name'])) {
  12. /*
  13. * Save image upload
  14. */
  15. try {
  16. $base_media_path = 'ibnab/owlsliders/images';
  17. $uploader = $this->uploader->create(
  18. ['fileId' => 'image']
  19. );
  20. $uploader->setAllowedExtensions(['jpg', 'jpeg', 'gif', 'png']);
  21. $imageAdapter = $this->adapterFactory->create();
  22. $uploader->addValidateCallback('image', $imageAdapter, 'validateUploadFile');
  23. $uploader->setAllowRenameFiles(true);
  24. $uploader->setFilesDispersion(true);
  25. $mediaDirectory = $this->filesystem->getDirectoryRead(\Magento\Framework\App\Filesystem\DirectoryList::MEDIA);
  26. $result = $uploader->save(
  27. $mediaDirectory->getAbsolutePath(base_media_path)
  28. );
  29. $data['image'] = base_media_path.$result['file'];
  30. } catch (\Exception $e) {
  31. if ($e->getCode() == 0) {
  32. $this->messageManager->addError($e->getMessage());
  33. }
  34. }
  35. } else {
  36. if (isset($data['image']) && isset($data['image']['value'])) {
  37. if (isset($data['image']['delete'])) {
  38. $data['image'] = null;
  39. $data['delete_image'] = true;
  40. } elseif (isset($data['image']['value'])) {
  41. $data['image'] = $data['image']['value'];
  42. } else {
  43. $data['image'] = null;
  44. }
  45. }
  46. }
  47. //end block upload image
  48. ................
  49. }
  50.  
  51.  

with simple code you upload the image and you try if delete is checked (if true it will be deleted)

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