Order of Symfony form CollectionType field

Question

In my model I have a Recipe entity and Ingredient entity. In Recipe entity, the relation is defined like this:

/**
 * @ORM\\OneToMany(targetEntity=\"Ingredie         


        

Answer 1

You need to use finishView method of your form type.

Here is the example of code:

public function finishView(FormView $view, FormInterface $form, array $options)
{
    usort($view['photos']->children, function (FormView $a, FormView $b) {
        /** @var Photo $objectA */
        $objectA = $a->vars['data'];
        /** @var Photo $objectB */
        $objectB = $b->vars['data'];

        $posA = $objectA->getSortOrder();
        $posB = $objectB->getSortOrder();

        if ($posA == $posB) {
            return 0;
        }

        return ($posA < $posB) ? -1 : 1;
    });
}