Magento2：尝试使用admin中的图像保存数据时出错

Question

我写了一个自定义滑块模块，其中包含幻灯片项目。在这种形式中，有一个图像字段来上传图像。

当我第一次创建带有图像的幻灯片项目一切正常并且我可以检索所有数据但是当我编辑它并再次保存时我得到了这个错误：

1个异常：异常＃0（异常）：注意：第51行/Users/louisserre/Sites/messika/lib/internal/Magento/Framework/Data/Form/Element/Image.php中的数组到字符串转换

即使图像字段未更改，我也收到此错误。

在此文件的ligne 51处，代码为：

public function getElementHtml(){
    $html = '';

    if ((string)$this->getValue()) {

我记录了$ this-> getValue（），当我第一次创建幻灯片项目时，我得到了：imagepath / image.jpg，当我编辑幻灯片项目时，我得到了数组（[value] => http://imagepath/image.jpg）。

这是我的表单域代码：

    $fieldset->addField('image_url', 'image', [
        'label' => __('Image'),
        'title' => __('Image'),
        'name' => 'image_url',
        'required' => true
    ]);

这是我的控制器Save.php文件：

<?php

namespace Ultranoir\Slider\Controller\Adminhtml\SliderItem;


use Ultranoir\Slider\Model\Slider;
use Magento\Backend\App\Action;
use Magento\TestFramework\ErrorLog\Logger;
use Magento\Framework\App\Filesystem\DirectoryList;

class Save extends \Magento\Backend\App\Action
{

/**
 * Store manager
 *
 * @var \Magento\Store\Model\StoreManagerInterface
 */
protected $storeManager;

/**
 * @var \Magento\Framework\Image\Factory
 */
protected $imageFactory;

/**
 * @var \Magento\Framework\Image\Factory
 */
protected $mediaDirectory;

/**
 * @var \Magento\Framework\View\Asset\Repository
 */
protected $assetRepo;

/**
 * @param \Magento\Store\Model\StoreManagerInterface $storeManager
 * @param \Magento\Framework\Image\Factory $imageFactory
 * @param \Magento\Framework\Filesystem $fileSystem
 * @param \Magento\Framework\View\Asset\Repository $assetRepo
 * @param Action\Context $context
 */
public function __construct(\Magento\Store\Model\StoreManagerInterface $storeManager,
                            \Magento\Framework\Image\Factory $imageFactory,
                            \Magento\Framework\Filesystem $fileSystem,
                            \Magento\Framework\View\Asset\Repository $assetRepo,
                            Action\Context $context)
{
    $this->storeManager = $storeManager;
    $this->imageFactory = $imageFactory;
    /** @var \Magento\Framework\Filesystem\Directory\Read $mediaDirectory */
    $this->mediaDirectory = $fileSystem->getDirectoryRead(DirectoryList::MEDIA);
    parent::__construct($context);
}

/**
 * {@inheritdoc}
 */
protected function _isAllowed()
{
    return $this->_authorization->isAllowed('Ultranoir_Slider::save_slideritem');
}

/**
 * Save action
 *
 * @return \Magento\Framework\Controller\ResultInterface
 */
public function execute()
{
    $data = $this->getRequest()->getPostValue();
    /** @var \Magento\Backend\Model\View\Result\Redirect $resultRedirect */
    $resultRedirect = $this->resultRedirectFactory->create();
    if ($data) {
        /** @var \Ultranoir\Slider\Model\SliderItem $model */
        $model = $this->_objectManager->create('\Ultranoir\Slider\Model\SliderItem');

        $id = $this->getRequest()->getParam('slider_item_id');
        if ($id) {
            $model->load($id);
        }
        /** @var \Ultranoir\Slider\Model\Slider $slider */
        $slider = $this->_objectManager->create('\Ultranoir\Slider\Model\Slider');
        $slider->load($model->getSliderId());

        try{
            $data['image_url'] = $this->saveImage();

        } catch (\Exception $e) {
            $result = ['error' => $e->getMessage(), 'errorcode' => $e->getCode()];
            $this->messageManager->addException($e, __('Something went wrong while uploading the file.'));
            $this->_getSession()->setFormData($data);
            return $resultRedirect->setPath('*/*/edit', ['slider_item_id' => $this->getRequest()->getParam
            ('slider_item_id')]);
        }

        $model->setData($data);

        $this->_eventManager->dispatch(
            'ultraslider_slideritem_prepare_save',
            ['slideritem' => $model, 'request' => $this->getRequest()]
        );

        try {
            $model->save();
            $this->messageManager->addSuccess(__('You saved this item.'));
            $this->_objectManager->get('Magento\Backend\Model\Session')->setFormData(false);
            if ($this->getRequest()->getParam('back')) {
                return $resultRedirect->setPath('*/*/edit', ['slider_item_id' => $model->getId(), '_current' =>
                    true]);
            }
            return $resultRedirect->setPath('*/*/');
        } catch (\Magento\Framework\Exception\LocalizedException $e) {
            $this->messageManager->addError($e->getMessage());
        } catch (\RuntimeException $e) {
            $this->messageManager->addError($e->getMessage());
        } catch (\Exception $e) {
            $this->messageManager->addException($e, __('Something went wrong while saving the record.'));
        }

        $this->_getSession()->setFormData($data);
        return $resultRedirect->setPath('*/*/edit', ['slider_item_id' => $this->getRequest()->getParam
        ('slider_item_id')]);
    }
    return $resultRedirect->setPath('*/*/');
}

protected function saveImage(){
    $uploader = $this->_objectManager->create(
        'Magento\MediaStorage\Model\File\Uploader',
        ['fileId' => 'image_url']
    );
    $uploader->setAllowedExtensions(['jpg', 'jpeg', 'gif', 'png']);
    /** @var \Magento\Framework\Image\Adapter\AdapterInterface $imageAdapter */
    $imageAdapter = $this->_objectManager->get('Magento\Framework\Image\AdapterFactory')->create();
    $uploader->addValidateCallback('ultraslider_slideritem_image', $imageAdapter, 'validateUploadFile');
    $uploader->setAllowRenameFiles(true);
    $uploader->setFilesDispersion(true);


    $result = $uploader->save($this->getBaseMediaPath());
    $this->generateThumbnails($result['file'], $this->getBaseMediaPath());
    $this->_eventManager->dispatch(
        'ultraslider_slideritem_gallery_upload_image_after',
        ['result' => $result, 'action' => $this]
    );

    unset($result['tmp_name']);
    unset($result['path']);

    $result['url'] = $this->getBaseMediaUrl(). $result['file'];
    return $result['url'];

}

protected function getBaseMediaPath(){
    return $this->mediaDirectory->getAbsolutePath('slider/slideritem');
}

protected function getBaseMediaUrl(){
    return $this->storeManager->getStore()->getBaseUrl(
        \Magento\Framework\UrlInterface::URL_TYPE_MEDIA
    ).'slider/slideritem';
}

/**
 * @return string
 */
public function getImageUrl($filePath)
{
    if (!$this->mediaDirectory->isFile($filePath)) {
        $url = $this->assetRepo->getUrl(
            "Ultranoir_Slider::images/slideritem/placeholder/thumbnail.jpg"
        );
    } else {
        $url = $this->storeManager->getStore()->getBaseUrl(
                \Magento\Framework\UrlInterface::URL_TYPE_MEDIA
            ) . $filePath;
    }

    return $url;
}

public function generateThumbnails($fileName, $destinationBaseDir){

    $configs = [
        [
            'width' => 100,
            'height' => 100
        ],
        [
            'width' => 200,
            'height' => 200
        ],
    ];
    // build new filename (most important params)


    foreach($configs as $config){
        $processor = $this->imageFactory->create($destinationBaseDir.$fileName);
        $processor->keepTransparency(true);
        $processor->keepAspectRatio(true);
        $processor->resize($config['width'], $config['height']);
        $path = [
            $destinationBaseDir,
            'cache',
            $this->storeManager->getStore()->getId(),
            'thumbnail'
        ];
        $path[] = "{$config['width']}x{$config['height']}";
        $newFile = implode('/', $path) . $fileName;
        $processor->save($newFile);
    }
}

}

提前感谢您的回答。

Answer 1

您需要根据操作更改保存代码。意味着新项目首次保存或任何时间任何项目编辑。

你可以这样做代码。

$id = $this->getRequest()->getParam('slider_item_id');
if ($id) // When Edit Any Image
{
    $image = Array([value]);
}
else // When New Image Add
{ 
    $image = (string)$this->getValue();
}

Answer 2

在保存数据之前，您需要将图像格式从数组更改为字符串。要解决此问题，只需在'$model->setData($data);'文件中的'save.php'之前插入以下代码即可。

代码是：

if(isset($data['image_url']['value']))
{
    $data['image_url'] = $data['image_url']['value'];
}