Typo3 frontend plugin, use _POST data in the controller - plugins

Question

I wrote a very simple extension in typo3 v7.6.11 with the extension builder where a visitor can ask for a taxi-ride.
everything works, only that I need to make the request more appealing by asking the pick-up point and the drop-off point ... that request goes to the actual form like this in the template (requestPid is the id of the page with the form):
<f:form pageUid="{settings.additional.requestPid}" action="form" name="request" object="{Request}">
<f:render partial="Ticket/RequestNewFields" />
<f:form.submit value="{f:translate(key: 'tx_wmnltickets_domain_model_ticket.admin.continue')}" />
</f:form>
but the formAction in the controler doesn't actually ask anything from the model (getArguments() I tried);
/**
* action form
*
* #return void
*/
public function formAction() {
$this->request->getArguments();
}
the request does send the $_POST but I see no way to get it into the form ...
if you'd like to see more code to understand, just ask, I don't know what you'd be looking for ...

Answer 1

Your form action should has the request parameter from you form:
/**
* action form
*
* #param array $request
*
* #return void
*/
public function formAction($request) {
}
Then you can access the data with $request['origin']
I'm not sure if the variable $request is allowed as argument. Maybe you must rename it in the function and in your fluid template if it doesn't work.

Answer 2

Did you create the extension with the builder? The easiest way is to create the fields (pickup-point, dropoff-point) in the builder, then create a createAction or newAction (not sure how it is called in the builder). It will create the template for the createAction where you can just copy/paste the <f:form...
There is a way to access directly POST/GET parameters (It is not recomended to use it directly when you can make it with the clean extbase way):
$myVar = \TYPO3\CMS\Core\Utility\GeneralUtility::_GP('myVar');