I am getting the following error when specifying an '#ajax' callback for a form extending ConfigFormBase
User error: The container was serialized. in Drupal\Core\DependencyInjection\Container->__sleep() (line 34 of core/lib/Drupal/Core/DependencyInjection/Container.php).
Drupal\Core\DependencyInjection\Container->__sleep()
serialize(Array)
Drupal\Component\Serialization\PhpSerialize::encode(Array)
Drupal\Core\KeyValueStore\DatabaseStorageExpirable->setWithExpire('form-6hhpGRoEkyVjfM69EDTddIABQBLbRjPOZrnqqTNmwWI', Array, 21600)
Drupal\Core\Form\FormCache->setCache('form-6hhpGRoEkyVjfM69EDTddIABQBLbRjPOZrnqqTNmwWI', Array, Object)
Drupal\Core\Form\FormBuilder->setCache('form-6hhpGRoEkyVjfM69EDTddIABQBLbRjPOZrnqqTNmwWI', Array, Object)
Drupal\Core\Form\FormBuilder->processForm('textimage_settings', Array, Object)
Drupal\Core\Form\FormBuilder->buildForm(Object, Object)
Drupal\Core\Controller\FormController->getContentResult(Object)
call_user_func_array(Array, Array)
Drupal\Core\Controller\HtmlPageController->getContentResult(Object, Array)
Drupal\Core\Controller\HtmlPageController->content(Object, Array)
call_user_func_array(Array, Array)
Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1)
Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1)
Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object, 1, 1)
....It looks like when processing the form for ajax, the entire container gets loaded to the '#ajax' key, and when the forms gets cached it gets serialised.
It was working right a few days ago, so it must be something introduced recently.
Active
9.5
Last updated
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It's likely this issue predates Contrib.social: some issue and comment data are missing.
And using DependencySerializationTrait produces these weird errors:
> TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, first array member is not a valid class name or object in call_user_func_array() (line 1013 of core/lib/Drupal/Core/Form/FormBuilder.php).
which make it look like DependencySerializationTrait::__sleep() is removing things that it shouldn't.
I've found a workaround though:
$form_state->disableCache();