Symfony 4 Form posting to a route - forms

Question

I have a problem with a form that deletes a doctrine object when posting in Symfony 4.I searched the problem and i only found that i might have to define a service? I am a beginner in symfony so dont blame me please... I am using datatables and the form is in a modal. When i press the delete button in the modal it tries to post to the route but an error comes up:
Service "request" not found: did you mean "request_stack"? Anyway, the container inside "App\Controller\ItemManagement" is a smaller service locator that only knows about the "doctrine", "form.factory", "http_kernel", "parameter_bag", "request_stack", "router", "security.csrf.token_manager", "session" and "twig" services. Try using dependency injection instead.
<div class="modal fade" id="deleteModal" tabindex="-1" role="dialog" aria-labelledby="exampleModalCenterTitle" aria-hidden="true">
<div class="modal-dialog modal-dialog-centered" role="document">
<div class="modal-content">
<div class="modal-header">
<h5 class="modal-title" id="deleteit">Delete Item</h5>
<button type="button" class="close" data-dismiss="modal" aria-label="Close">
<span aria-hidden="true">×</span>
</button>
</div>
<div class="modal-body">
Are you sure you want to delete this item?
<form action="{{ path('delete_item')}}" method="POST" id="theform" >
<input type="hidden" value="" name="itemtodel" id="itemtodel"/>
</form>
</div>
<div class="modal-footer">
<button type="button" class="btn btn-secondary" data-dismiss="modal">Close</button>
<button type="submit" form="theform" class="btn btn-danger">Delete</button>
</div>
</div>
</div>
</div>
In Controller:
/**
* #Route("/delitem", name="delete_item", methods={"POST"});
*/
public function deletetheitem(Request $request)
{
if ($request->isMethod('POST')) {
$itemid = $this->get('request')->request->get('itemtodel');
... deleting item code...
}
}
return $this->redirectToRoute("item_management", [], 301);
}
The route item_management is in the same controller and works fine. Am i doing it with the wrong way? Please if you have something to suggest i will appreciate it, thanks!!!!

Answer 1

try replacing
$this->get('request')->request->get('itemtodel')
by
$request->request->get('itemtodel')

Answer 2

First of all, you do not need to define any services since everything should work out of the box in the Symfony 4 (if you have not customize a default config).
Second, do not create static html forms in the template. Use Symfony Forms instead (https://symfony.com/doc/current/forms.html).
Third, you do not need to use request object if there should not be extra checks for query that get the object to delete. If you have not switched off param converter option (see https://symfony.com/doc/current/best_practices/controllers.html#using-the-paramconverter) of default Symfony 4, delete action could be like that:
/**
* #Route("/delitem/{item}", name="delete_item", methods={"POST"});
*/
public function deleteItemAction(Item $item)
{
$doctrine = $this->getDoctrine();
$em = $doctrine->getManager();
$em->remove($item);
$em->flush();
//process your response
}