Access form data in multiple actions on same page - typo3

Question

I'm trying to access a submitted object from one action in an other action on the same page, while making it available to both actions.
Example: Site /search/ has two plugins embedded:
SearchPlugin
shows search form
submits form to itself
ResultPlugin
should get form data from SearchPlugin
Now if I submit the SearchPlugin form data to itself I only have the form data available in the SearchPlugin action, not in the ResultPlugin. If it submit the SearchPlugin form to the ResultPlugin action I only have the data available in the ResultPlugin, not in the SearchPlugin.
I need the data to be available in both plugins/actions on the same site after submitting.
Is this somehow possible?

Answer 1

Built-in Extbase configuration option
You can use view.pluginNamespace to have both plugins use the same HTTP parameter namespace, (e.g. search instead of tx_extension_plugin1/tx_extension_plugin2): https://docs.typo3.org/m/typo3/book-extbasefluid/master/en-us/b-ExtbaseReference/Index.html
That will make your Extbase actions be able to "share" all parameters. Make sure that all your plugin actions are ready for that.
(Keep in mind though that this "feature" might be deprecated once probably because it adds some architectural burden to efficient resolving of routing configurations. But that is just rumor and I got the idea from here: https://github.com/TYPO3-Documentation/TYPO3CMS-Book-ExtbaseFluid/pull/379/files)
Custom solution
You can manually set up parameters for your Extbase actions in an initializeAction:
$pluginContexts = [
'tx_extension_plugin2',
];
// look for a SearchObject in a different (HTTP) plugin namespace
if (!$this->request->hasArgument('searchObject')) {
foreach ($pluginContexts as $pluginContext) {
$foreignPluginContext = \TYPO3\CMS\Core\Utility\GeneralUtility::_GP($pluginContext);
if (isset($foreignPluginContext['searchObject'])) {
$searchObject = $foreignPluginContext['searchObject'];
// if needed do some mapping to object here or validate
...
$this->request->setArgument('searchObject', $searchObject);
break;
}
}
}