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

I use this:

use Symfony\Component\Validator\ExecutionContextInterface;

class Person 
{
...

/**
 * @ORM\OneToMany(targetEntity="Address", mappedBy="owner", cascade={"persist", "detach"})
 */
protected $addressList;

....

/**
 * @Assert\Callback
 */
public function validate(ExecutionContextInterface $context)
{
    if (!$this->getAddressList()->count()) {
        $context->addViolationAt(
            'addressList',
            'You must add at least one address',
            array(),
            null
        );
    }
}
}

http://symfony.com/doc/current/reference/constraints/Callback.html