Symfony form that generates another form - forms

Question

I have a controller action the prompts the user for some free text input. When submitted the text is parsed into some number of objects that I want to put out on another form for the user to confirm that the initial parsing was done correctly.
Normally after dealing with the response to a form submission we call $this->redirectToRoute() to go off to some other path but I have all these objects laying around that I want to use. If I redirect off someplace else I lose them.
How can I keep them? I tried building my new form right there in the controller action method but then its submission does not seem to be handled properly.
/**
* #Route( "/my_stuff/{id}/text_to_objects", name="text_to_objects" )
*/
public function textToObjects( Request $request, Category $category ) {
$form = $this->createForm( TextToObjectsFormType::class, [
'category' => $category,
]);
$form->handleRequest( $request );
if( $form->isSubmitted() && $form->isValid() ) {
$formData = $form->getData();
$allTheStuff = textParserForStuff( $formData['objectText'] );
$nextForm = $this->createForm( StuffConfirmationFormType::class, $allTheStuff );
return $this->render( 'my_stuff/confirmation.html.twig', [
'form' => $nextForm->createView(),
'category' => $category,
] );
}
return $this->render( 'my_stuff/text.html.twig', [
'form' => $form->createView(),
'category' => $category,
] );
}
This does fine to the point of displaying the confirmation form but when I submit that form I just end up displaying the original TextToObjects form?
To answer albert's question, the TextToObjectsFormType just has three fields, a way to set the date & time for the group of generated objects, a way to select the origin of the objects and a textarea for the textual description. I do not set a data_class so I get an associative array back with the submitted information.
class TextToObjectsFormType extends AbstractType {
public function buildForm( FormBuilderInterface $builder, array $options ) {
$builder
->add( 'textSourceDateTime', DateTimeType::class, [
'widget' => 'single_text',
'invalid_message' => 'Not a valid date and time',
'attr' => [ 'placeholder' => 'mm/dd/yyyy hh:mm',
'class' => 'js-datetimepicker', ],
])
->add( 'objectsOrigin', EntityType::class, [
'class' => ObjectSourcesClass::class,
])
->add( 'objectText', TextareaType::class, [
'label' => 'Copy and paste object description text here',
]);
}
}
How can I get the confirmed, potentially revised, objects back to put them into the database?
Thanks.

Answer 1

Using your current architecture
$nextForm = $this->createForm( StuffConfirmationFormType::class, $allTheStuff );
does not bear enough information. It should contain the action parameter to tell the submission to where route the post request.
In your StuffConfirmationFormType add an 'objectText' field hidden.
Create a confirmation_stuff route
Create an action for this route
In this action if the form is valid => save your stuff ELSE re render TextToObjectsFormType with an action linked to text_to_objects
Be aware that using this technique would not prevent a user to enter non functional data by manually editing the hidden field.
Hope this helps