Jan 19, 2024
diff --git a/form/form_collections.rst b/form/form_collections.rst
        }
    }

 .. note::

    If you want to access the linked data, you will need to use events::

        // src/Form/TagType.php

        // ...
        public function buildForm(FormBuilderInterface $builder, array $options): void
        {
            // ...
            $builder->addEventListener(FormEvents::PRE_SET_DATA, function(FormEvent $event) {
                $data = $event->getData();
                // ...
            });
        }
        // ...

    And when the form (which call the CollectionType) sets the ``by_reference`` option
    to false, the entire form must to be inside a ``PRE_SET_DATA`` event::

        // src/Form/TaskType.php

        // ...
        public function buildForm(FormBuilderInterface $builder, array $options): void
        {
            // ...
            $builder->addEventListener(FormEvents::PRE_SET_DATA, function(FormEvent $event) {
                $form = $event->getForm();
                $form->add('tags', CollectionType::class, [
                    'entry_type' => TagType::class,
                    'by_reference' => false,
                ]);
            });
            // ...
        }
        // ...

 .. seealso::

    If you want to learn more about the form events, read :ref:`events`
    and :ref:`dynamic_form_modification`.

 In your controller, you'll create a new form from the ``TaskType``::

    // src/Controller/TaskController.php
Original file line number	Diff line number	Diff line change
Expand Up		@@ -125,6 +125,48 @@ inside the task form itself::
		}
		}

		.. note::

		If you want to access the linked data, you will need to use events::

		// src/Form/TagType.php

		// ...
		public function buildForm(FormBuilderInterface $builder, array $options): void
		{
		// ...
		$builder->addEventListener(FormEvents::PRE_SET_DATA, function(FormEvent $event) {
		$data = $event->getData();
		// ...
		});
		}
		// ...

		And when the form (which call the CollectionType) sets the ``by_reference`` option
		to false, the entire form must to be inside a ``PRE_SET_DATA`` event::

		// src/Form/TaskType.php

		// ...
		public function buildForm(FormBuilderInterface $builder, array $options): void
		{
		// ...
		$builder->addEventListener(FormEvents::PRE_SET_DATA, function(FormEvent $event) {
		$form = $event->getForm();
		$form->add('tags', CollectionType::class, [
		'entry_type' => TagType::class,
		'by_reference' => false,
		]);
		});
		// ...
		}
		// ...

		.. seealso::

		If you want to learn more about the form events, read :ref:`events`
		and :ref:`dynamic_form_modification`.

		In your controller, you'll create a new form from the ``TaskType``::

		// src/Controller/TaskController.php
Expand Down