Symfony2 - Set a selected value for the entity field

Question

I\'m trying to set a selected value inside an entity field. In accordance with many discussions I\'ve seen about this topic, I tried to set the data option but

Answer 1

In order to option appear selected in the form, you should set corresponding value to entity itself.

$place = $repository->find(2);
$entity->setPlace($place);
$form = $this->createForm(new SomeFormType(), $entity);
....