TYPO3 Extension - Redirect to another page in show action if no record is set or not available - typo3

Question

How can I redirect to another page when someone access the detail page but without a record or if record is not available?
I have detail records like
domain.com/abc/ABC1234
When somone enters
domain.com/abc/
... I get:
Uncaught TYPO3 Exception
#1298012500: Required argument "record" is not set for Vendor\Extension\Controller\ActionController->show. (More information)
TYPO3\CMS\Extbase\Mvc\Controller\Exception\RequiredArgumentMissingException thrown in file
/is/htdocs/www/typo3_src-8.7.11/typo3/sysext/extbase/Classes/Mvc/Controller/AbstractController.php in line 425.
... in this case I want it to redirect to:
domain.com/other-page/
... I also need it if a specific record is not available.
... how to do so?
/**
* action show
*
* #param \Action $record
* #return void
*/
public function showAction(Action $record) {
$this->view->assign('record', $record);
}
Here are some examples TYPO3 Extbase - redirect to pid ... but not sure how to implement it
Edit: What works is ...
/**
* action show
*
* #param \Action $record
* #return void
*/
public function showAction(Action $record=null) {
if ($record === null) {
$pageUid = 75;
$uriBuilder = $this->uriBuilder;
$uri = $uriBuilder
->setTargetPageUid($pageUid)
->build();
$this->redirectToUri($uri, 0, 404);
} else {
$this->view->assign('record', $record);
}
}

Answer 1

The redirect method needs an action and controller parameter. So your redirect code is wrong.
$this->redirect($actionName, $controllerName = NULL, $extensionName = NULL, array $arguments = NULL, $pageUid = NULL, $delay = 0, $statusCode = 303);
To redirect to an PageUID you need to use the uriBuilder and the redirectToUri method. See here for an example.

Answer 2

This should do the trick:
public function showAction(Action $record=null) {
if ($record === null) {
$this->redirect(/* add parameters as needed */);
} else {
// other code
}
Alternative Solution (from Simon Oberländer)
public function intializeShowAction() {
if (!$this->request->hasArgument('record')) {
$this->redirect(/* add parameters as needed */); // stops further execution
}
}
Your question suggests that there should be an other action without arguments, probably a listAction, that is the DEFAULT action. The default action gets called when no action is specified. It is the first action enlisted in the ExtensionUtility::configurePlugin() call.
\TYPO3\CMS\Extbase\Utility\ExtensionUtility::configurePlugin(
'Vendor.' . $_EXTKEY,
'Pluginname',
array(
'Domainobject' => 'list, show',
),
// non-cacheable actions
array(
'Domainobject' => 'list, show',
)
);
Regarding > The identity property "TTTT" is no UID
You have to distinguish between no parameter and an invalid parameter. For the latter you can add #ignorevalidation to the showAction comments and do your validation testing within the action - or you can leave it to extbase that displays the error message you have seen.
Where would you get a link like domain.com/abc/TTTT/ from anyhow? Unless the link is expired.
BTW: in a production system you would disable the display of exceptions, thus the display of the website would work.

Answer 3

This could be a solution:
```
/**
* Show a booking object
*
* #return void
* #throws \TYPO3\CMS\Extbase\Mvc\Exception\NoSuchArgumentException
*/
public function showAction()
{
$bookingObject = null;
$bookingObjectUid = 0;
if ($this->request->hasArgument('bookingObject')) {
$bookingObjectUid = (int)$this->request->getArgument('bookingObject');
}
if ($bookingObjectUid > 0) {
$bookingObject = $this->bookingObjectRepository->findByIdentifier($bookingObjectUid);
}
if (!($bookingObject instanceof BookingObject)) {
$messageBody = 'Booking object can\'t be displayed.';
$messageTitle = 'Error';
$this->addFlashMessage($messageBody, $messageTitle, AbstractMessage::ERROR);
$this->redirect('list');
}
$this->view->assign('bookingObject', $bookingObject);
}
```