EasyAdmin 3 : Nested forms

I'm trying to embed forms into forms. In my case : I want to embed Period and Price form into Offer form into Poi form. The architecture :

• Poi form
  • Offer form
    • Price form
    • Period form

Relations:

• Poi entity has relation OneToMany with Offer entity
• Offer entity has relation OneToMany with Price entity and ManyToMany with Periodentity.

I've been looking for solution for couple of days and I really need help, so if someone could help me it will be great.

1. First test : usage of CollectionFieldIn my PoiCrudController :

        public function configureFields(string $pageName): iterable{        $offers = CollectionField::new('offers')        ->setFormTypeOptions(['delete_empty' => true,'by_reference' => false,        ])        ->setEntryIsComplex(false)        ->setCustomOptions(['allowAdd' => true,'allowDelete' => true,'entryType' => 'App\Form\OfferType','showEntryLabel' => false,        ]),

In OfferType :

`class OfferType extends AbstractType {

public function buildForm(FormBuilderInterface $builder, array $options) {    $builder        ->add('description', CollectionType::class, array('allow_add' => true,'allow_delete' => true,'delete_empty' => true,'by_reference' => false,'entry_type' => TextEditorType::class,'entry_options' => ['label' => false,            ],'label' => 'Description',          ))        ->add('createdAt')        ->add('updatedAt')        ->add('periods')        ->add('poi')    ;}`

ERROR MESSAGE => The "App\Entity\Poi" entity has a repositoryClass set to "App\Entity\PoiRepository", but this is not a valid class. Check your class naming. If this is meant to be a service id, make sure this service exists and is tagged with "doctrine.repository_service".

If I replace 'entryType' => 'App\Form\OfferType', with 'entryType' => 'App\Form\PoiType' in PoiCrudController, and add this code in PoiType :

`class PoiType extends AbstractType {

public function buildForm(FormBuilderInterface $builder, array $options) {    $builder        ->add('offers', CollectionType::class, array('allow_add' => true,'allow_delete' => true,'delete_empty' => true,'by_reference' => false,'entry_type' => TextType::class, // cette ligne pose problème'entry_options' => ['label' => false,            ],'label' => 'Offres',          ))

Then the Poi form is nested into Poi form where the field 'offer' appears.If I replace 'entry_type' => TextType::class with 'entry_type' => TextEditorType::class, a new error appears :

ERROR MESSAGE : Impossible to access an attribute ("customOptions") on a null variable.in vendor\easycorp\easyadmin-bundle\src\Resources\views\crud\form_theme.html.twig (line 424){% set numOfRows = form.vars.ea_crud_form.ea_field.customOptions.get('numOfRows') %}

2. Second test : usage of CollectionField

In PoiCrudController :

CollectionField::new('offers', 'Offres')            ->allowAdd()             ->allowDelete()            ->setEntryIsComplex(true)            ->setEntryType(OfferCrudController::class)        ->setFormTypeOptions(['by_reference' => 'false'        ]),

ERROR MESSAGE => Could not load type "App\Controller\Admin\OfferCrudController": class does not implement "Symfony\Component\Form\FormTypeInterface.My forms implement AbstractType so...

3. Third test : usage of AssociationField

In PoiCrudController :

AssociationField::new('offers')            ->setFormTypeOptions(['by_reference' => false,'multiple' => true,'allow_add' => true            ]),

ERROR MESSAGE => An error has occurred resolving the options of the form "Symfony\Bridge\Doctrine\Form\Type\EntityType": The option "allow_add" does not exist=>Issue #3528 [https://github.com/EasyCorp/EasyAdminBundle/issues/3528][2]