fix(bootstrap-admin-ui): pick the form method from the page instead of the resource id

src/AdminUi/templates/crud/create.html.twig

@@ -14,7 +14,7 @@
 {% endblock %}
 
 {% block body %}
-    {% hook 'create' with { _prefixes: prefixes, resource, metadata, configuration, form } %}
+    {% hook 'create' with { _prefixes: prefixes, resource, metadata, configuration, form, form_method: 'POST' } %}
 {% endblock %}
 
 {% block stylesheets %}

src/AdminUi/templates/crud/update.html.twig

@@ -14,7 +14,7 @@
 {% endblock %}
 
 {% block body %}
-    {% hook 'update' with { _prefixes: prefixes, resource, metadata, configuration, form } %}
+    {% hook 'update' with { _prefixes: prefixes, resource, metadata, configuration, form, form_method: 'PUT' } %}
 {% endblock %}
 
 {% block stylesheets %}

src/BootstrapAdminUi/templates/shared/crud/common/content/form.html.twig

@@ -14,6 +14,10 @@
         <div class="card-body">
             {% if hookable_metadata.configuration.method is defined %}
                 <input type="hidden" name="_method" value="{{ hookable_metadata.configuration.method }}"/>
+            {% elseif hookable_metadata.context.form_method is defined %}
+                {% if hookable_metadata.context.form_method != 'POST' %}
+                    <input type="hidden" name="_method" value="{{ hookable_metadata.context.form_method }}"/>
+                {% endif %}
             {% elseif form.vars.data.id|default(null) is not null %}
                 <input type="hidden" name="_method" value="PUT"/>
             {% endif %}

src/BootstrapAdminUi/tests/Functional/.application/src/Resource/BookResource.php

@@ -28,7 +28,7 @@
     driver: false,
     operations: [
         new Index(grid: BookGrid::class),
-        new Create(),
+        new Create(factory: [self::class, 'withGeneratedId']),
         new Update(provider: BookItemProvider::class),
     ],
 )]
@@ -40,6 +40,11 @@ public function __construct(
     ) {
     }
 
+    public static function withGeneratedId(): self
+    {
+        return new self(bin2hex(random_bytes(8)));
+    }
+
     public function getId(): ?string
     {
         return $this->id;

src/BootstrapAdminUi/tests/Functional/FormMethodTest.php

@@ -0,0 +1,43 @@
+<?php
+
+/*
+ * This file is part of the Sylius package.
+ *
+ * (c) Sylius Sp. z o.o.
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace Tests\Sylius\BootstrapAdminUi\Functional;
+
+use Symfony\Bundle\FrameworkBundle\KernelBrowser;
+use Symfony\Bundle\FrameworkBundle\Test\WebTestCase;
+
+final class FormMethodTest extends WebTestCase
+{
+    private KernelBrowser $client;
+
+    protected function setUp(): void
+    {
+        $this->client = self::createClient();
+    }
+
+    public function testCreateFormIsPostedEvenWhenTheNewResourceAlreadyHasAnId(): void
+    {
+        $this->client->request('GET', '/books/new');
+
+        $this->assertResponseIsSuccessful();
+        $this->assertSelectorNotExists('form input[name="_method"]');
+    }
+
+    public function testUpdateFormIsPut(): void
+    {
+        $this->client->request('GET', '/books/the-shining/edit');
+
+        $this->assertResponseIsSuccessful();
+        $this->assertSelectorExists('form input[name="_method"][value="PUT"]');
+    }
+}