symfony form submit breaks when method DELETE is used

Question

In symfony 3 this code below worked fine. Upgrading to symfony 5 it doesn't.

Controller:

public function deleteAction(Request $request, ACRGroup $aCRGroup)
{
    
    $form = $this->createDeleteForm($aCRGroup);
    $form->handleRequest($request);

    if ($form->isSubmitted() && $form->isValid()) {

    //Check for related entities (if found, prevent deletion)
        $reasons ="";

        //Users
        if (!$aCRGroup->getUsers()->isEmpty()) {
            $reasons .= 'användare ';
        }

        //DebitPeriods
        if (!$aCRGroup->getDebitPeriods()->isEmpty()) {
            $reasons .= 'debiteringsperioder  ';
        }

        //Analysis
        if (!$aCRGroup->getAnalysis()->isEmpty()) {
            $reasons .= 'analyser(flygsäkerhetsbedömningar) ';
        }

        //Positions
        if (!$aCRGroup->getPositions()->isEmpty()) {                
            $reasons .= 'positioner ';
        }

        if (strlen($reasons)>0) {

            $this->helper->flash('fail','Kunde inte radera gruppen '.$aCRGroup->getName().' eftersom det finns '.$reasons.' knutna till den.');
            return $this->redirectToRoute('group_index');               

        } else {
            $groupName = $aCRGroup->getName();

            $em = $this->em;
            $em->remove($aCRGroup);
            $em->flush($aCRGroup);              

            $this->helper->flash('success','Raderade gruppen '.$groupName);
            return $this->redirectToRoute('group_index');
        }
    }

Form:

 */
private function createDeleteForm(ACRGroup $aCRGroup)
{
    return $this->createFormBuilder()
        ->setAction($this->generateUrl('group_delete', array('id' => $aCRGroup->getId())))
        ->setMethod('DELETE')
        ->getForm()
    ;
}

The form looks like this when rendered

<form name="form" method="post" action="/webtools/public/group/20/delete">
    <input type="hidden" name="_method" value="DELETE">
    <input class="btn btn-danger pull-right" type="submit" value="Ta bort Grupp" onclick="return confirm('Är du säker att du vill ta bort denna Grupp?')">
    <input type="hidden" id="form__token" name="form[_token]" value="31b74d.RTs_QX5H9-4T_S5iQXKLD7G4z_3sQI_6TM_Xepg3rYY.NmQNbCdqnatjsxsOcUXgftD_roiZAeW7C_iiIsEFgPYxCXMtJiXClEmnHg">
</form>

Routing:

group_delete:
    path:     /{id}/delete
    defaults: { _controller: App\Controller\ACRGroupController::deleteAction }
    methods:  DELETE

This results in error

no route found for "POST http://localhost:8888/webtools/public/group/20/delete": Method Not Allowed (Allow: DELETE)

Changing the routing to methods: POST ...

group_delete:
    path:     /{id}/delete
    defaults: { _controller: App\Controller\ACRGroupController::deleteAction }
    methods:  POST

... that allows the code to step into the controller, but then the test for

if ($form->isSubmitted() && $form->isValid())

always returns false. A dd($form) reveals that form isSubmitted indeed equals false.

Apparently that was due to the conflict between the routing expecting POST and the CreateDeleteForm generating a form with method DELETE. So changing the form generating function to match POST...

->setMethod('DELETE')

... makes it all work again.

But why is DELETE seemingly no longer allowed? Did I miss something here, isn't the DELETE method standard by now?

HTML forms don't generally support DELETE, if that's what you're getting at. — ADyson
– ADyson, Commented Aug 30, 2022 at 22:54
As the rendered form shows, the html method is post, but a hidden field tells symfony to look for method delete. But for some reason it works differently now than it used to in the previous symfony versions — Matt Welander
– Matt Welander, Commented Sep 1, 2022 at 7:07

Dany Des · Accepted Answer · 2025-03-02 13:45:18Z

0

What I've found is in my case when upgrading to Symfony 5 the property http_method_override: true was set to true by the recipe—I didn't check right when updating the recipe, so I removed the config, because they have updated it with the false value by default.

https://github.com/symfony/symfony/issues/45278

answered Mar 2 at 13:45

Dany Des

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