TYPO3 Fluid resource.record.fal - typo3

Question

With the vhs viewhelper "resource.record.fal" i select the image from the page ressources. This works very fine but i also want to inheritance the image as long as there is no other image uploaded.
Is there a way to do that? The slide attribute is not available for this viewhelper.
I know i can do all of this just with Typoscript but i want to find a solution based on Fluid.
Here is my code:
<v:resource.record.fal table="pages" field="media" uid="{data.uid}" as="resources" >
<f:for each="{resources}" as="resource">
<v:resource.image identifier="{resource.id}" />
</f:for>

Answer 1

Okay, here goes some Fluid free-styling inline syntax:
{v:page.rootLine()
-> v:iterator.column(columnKey: 'media', indexKey: 'uid')
-> v:iterator.filter(preserveKeys: 1)
-> v:iterator.keys()
-> v:iterator.last()
-> f:variable(name: 'firstPageUidWithMedia')}
In steps:
Extract the page root line
Extract a sub-array of all media column values, use column uid as keys
Filter this to remove any empty values but preserve the keys
Extract a sub-array of only the keys
Pick the last key, which is the real page UID we want
Assign that to a variable
Then use the {firstPageUidWithMedia} instead of {data.uid}.

Answer 2

I am working to upgrade Typo3 from 6.2 to 9.5 LTS, i founded that fluidcontent will be used anymore, now below code used for previewing image in Flux content.
I have replaced my old code:
<f:for each="{v:content.resources.fal(field: 'teaserImage')}" as="image">
<img src="{f:uri.image(src:'{image.id}',maxWidth:'64',treatIdAsReference:'1')}" alt="{image.alternative}"/>
</f:for>
To Below New code:
<v:content.resources.fal field="teaserImage" as="images" record="{record}">
<f:for each="{images}" as="image">
<f:if condition="{image}">
<f:image src="{image.id}" treatIdAsReference="1" maxWidth="100"/>
</f:if>
</f:for>
</v:content.resources.fal>

Answer 3

I developed this VH which do what you need :
namespace Your\Vendor\ViewHelpers;
/*
* This file is part of the TYPO3 CMS project.
*
* It is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License, either version 2
* of the License, or any later version.
*
* For the full copyright and license information, please read the
* LICENSE.txt file that was distributed with this source code.
*
* The TYPO3 project - inspiring people to share!
*/
use TYPO3\CMS\Core\Resource\File;
use TYPO3\CMS\Core\Resource\FileReference;
use TYPO3\CMS\Core\Resource\FileRepository;
use TYPO3\CMS\Core\Utility\GeneralUtility;
use TYPO3\CMS\Extbase\Utility\DebuggerUtility;
use TYPO3\CMS\Frontend\Page\PageRepository;
use TYPO3Fluid\Fluid\Core\Rendering\RenderingContextInterface;
use TYPO3Fluid\Fluid\Core\ViewHelper\AbstractViewHelper;
use TYPO3Fluid\Fluid\Core\ViewHelper\Traits\CompileWithRenderStatic;
/**
* View helper to get the first image of rootline.
*/
class RootlineFirstImageViewHelper extends AbstractViewHelper
{
use CompileWithRenderStatic;
/**
* {#inheritdoc}
*/
public function initializeArguments()
{
$this->registerArgument('pid', 'int', '', true);
}
/**
* {#inheritdoc}
*/
public static function renderStatic(
array $arguments,
\Closure $renderChildrenClosure,
RenderingContextInterface $renderingContext
): ?File {
$fileRepository = GeneralUtility::makeInstance(FileRepository::class);
$pages = GeneralUtility::makeInstance(PageRepository::class)->getRootLine($arguments['pid']);
$files = [];
foreach ($pages as $page) {
/** #var FileReference[] $files */
$files = $fileRepository->findByRelation('pages', 'media', $page['uid']);
if (!empty($files)) {
break;
}
}
// It would be nice to have an extra argument to get a random image of the array.
return !empty($files) ? $files[0]->getOriginalFile() : null;
}
}
Then you can call it like this in your Fluid template :
<f:variable name="rootlineFirstImage"><whatever:rootlineFirstImage pid="{data.uid}"/></f:variable>
<f:if condition="{rootlineFirstImage}">
<f:image image="{rootlineFirstImage}" width="1280"/>
</f:if>