Symfony2+Doctrine - Validating one-to-many collection of entities

Question

I have a form to create a new entity. That entity has a collection of other entities that are also entered in that form.

I want to use the validation options of the

Answer 1

Just add annotation assert like following

/** 
 * @Assert\Count(
 *      min = "1",
 *      minMessage = "You must specify at least one"
 * )
 * @Assert\Valid 
 * 
 */
protected $name_of_collection_property;