Ajax EntityType issue

[lwillems]

Hi

I am trying to use dependency fields on an existing form with a child defined as entityType.
When choices of this entity are loaded on page load everything works great.
But when this entityType is populated with ajax (like this) callback seems not being called on postsubmit.
Perhaps adding the field again in an event listener prevents dependent events to works ?

Thx for help
Regards

[bgchikin]

                ->addEventListener(FormEvents::PRE_SUBMIT, function (FormEvent $event) use ($builder): void {
                    $dataArray = $event->getData();

                    $builder->addDependent('fieldName', ['dependency'], function (
                        DependentField $field,
                        ?string $dependency,
                    ) use ($dataArray) {
                        if ('something' !== $dependency) {
                            return;
                        }

                        $field->add();
                    });
                });

[bocharsky-bw]

Hey @lwillems ,

Yeah, re-adding the field in the event listener may break dependency hooks.

Try to load choices with a choice_loader option instead of re-adding the field completely. Or, probably updating options on the client side via AJAX and keeping the same field instance in Symfony should help too.

Also, the tip from @bgchikin may also help, though IIRC you may need $event->getForm()->addDependent() instead of $builder->addDependent(). Didn't try myself though