how do basic jquery ajax in typo3 flow? - ajax

Question

I am trying to do some very basic ajax. I just want an onchange event on a select that will call an ajax function that will get the options for another select and fill it in. However I am not sure how to do this in a simple way in Typo3 Flow. My php code for the action just looks like this:
public function getProductsByCategoryAction( $category='' ) {
$postArguments = $this->request->getArguments();
echo __LINE__;
TYPO3\Flow\var_dump($postArguments); die;
}
and my ajax call looks like this:
jQuery('#get_category').change(function(event) {
event.preventDefault();
alert('get products');
var category = jQuery('#get_category').val();
alert(category);
jQuery.ajax({
url: "/admin/orders/getproductsbycategory.html",
data: {
'category': category
},
async: true,
dataType: 'html',
success: function(data) {
alert('hi mom');
...
}
});
});
when I try this url in the browser mysite-dot-com/admin/orders/getproductsbycategory.html?category=17ca6f3e-a9af-da7d-75cd-20f8d6a05ed0
on the page the var_dump just gives me array(empty). Why doesn't the request->getArguments() call work and give the category argument?
The getproductsbycategory.html is created in Neos and has the right plugin for the action call. So I know the right action gets run but it does not get any args. At this point the argument is just a string and not an _identity even though I should eventually do it that way, I'm trying to keep things simple for now for the sake of expediency.
Thanks
Update: as a temp workaround shameless hack I just did this to get the variable:
$categoryID = $_GET['category'];
which works but I'd like to know the proper way especially if it does not involve writing my own view helpers.

Answer 1

First define variable in your html file
<script>
var ajaxUrl = '<f:uri.action action="actionName" controller="(controllername)Ajax"/>';
</script>
Your Ajax code will look like :->
$.ajax({
data: '&lookup='+{somevalue},
type: 'POST',
url: ajaxUrl,
success: function(data) {
$('.lookup-id').append(data);
},
});
Your conroller action will look like :->
public function getLookupIdAction(){
// Get company detail for set logo of company
$companyDetail = $this->getUserCompany();
// Template Name
$templateName = 'GetLookupID.html';
$viewVariables = $this->lookupIdentifierRepository->findByCompany($companyDetail);
$templatepath = 'resource://WIND.Alertregistration/Private/Templates/LookupIdentifier/' . $templateName;
$this->standaloneView->setLayoutRootPath('resource://WIND.Alertregistration/Private/Layouts');
$this->standaloneView->setPartialRootPath('resource://WIND.Alertregistration/Private/Partials');
$this->standaloneView->setFormat('html');
$this->standaloneView->setTemplatePathAndFilename($templatepath);
$this->standaloneView->assignMultiple(array("lookUpValue" => $viewVariables));
$this->standaloneView->setControllerContext($this->getControllerContext());
return $this->standaloneView->render();
}
Your view file look like :->
<f:layout name="Lookup" />
<f:section name="Content">
<label for="lookupId" style="box-sizing: border-box;">Identifier</label>
<div class="select-box" style="box-sizing: border-box;">
// Your Code
</div>
</f:section>