MergeDoctrineCollectionListener example

    protected function getBuilder()
    {
        return new FormBuilder('name', null, $this->dispatcher, $this->factory);
    }

    protected function getForm()
    {
        return $this->getBuilder()
            ->setData($this->collection)
            ->addEventSubscriber(new MergeDoctrineCollectionListener())
            ->getForm();
    }

    public function testOnSubmitDoNothing()
    {
        $submittedData = ['test'];
        $event = new FormEvent($this->getForm(), $submittedData);

        $this->dispatcher->dispatch($event, FormEvents::SUBMIT);

        $this->assertTrue($this->collection->contains('test'));
        

        $this->registry = $registry;
    }

    /** * @return void */
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        if ($options['multiple'] && interface_exists(Collection::class)) {
            $builder
                ->addEventSubscriber(new MergeDoctrineCollectionListener())
                ->addViewTransformer(new CollectionToArrayTransformer(), true)
            ;
        }
    }

    /** * @return void */
    public function configureOptions(OptionsResolver $resolver)
    {
        $choiceLoader = function DOptions $options) {