The DataPersistorInterface is used to persist data temporarily for later use, such as during a redirect.
It is often used in controllers to store form data in the session so that it can be used to pre-populate a form if there is an error in form submission.
public function execute()
{
$post = $this->getRequest()->getPostValue();
$resultRedirect = $this->resultRedirectFactory->create();
if ($post) {
$model = $this->contactFactory->create($post);
try {
$this->contactRepository->save($model);
$this->messageManager->addSuccessMessage(__('Your inquiry was submitted and will be responded to as soon as possible. Thank you for contacting us.'));
$this->dataPersistor->clear('contact_us');
return $resultRedirect->setPath('contact/index');
} catch (LocalizedException $e) {
$this->messageManager->addErrorMessage($e->getMessage());
} catch (\Exception $e) {
$this->messageManager->addExceptionMessage($e, __('An error occurred while processing your form. Please try again later.'));
}
$this->dataPersistor->set('contact_us', $post);
return $resultRedirect->setPath('contact/index');
}
return $resultRedirect->setPath('contact/index');
}
To use it simple include the Magento\Framework\App\Request\DataPersistorInterface in your __construct()
use Magento\Framework\App\Request\DataPersistorInterface;
class YourClass {
protected DataPersistorInterface $dataPersistor;
public function __construct(
DataPersistorInterface $dataPersistor
) {
$this->dataPersistor = $dataPersistor;
}
}
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