Symfony2 form validation based on two fields

Question

I am currently developing a Website in which user may buy gift cards. I am using a three step form using the CraueFormFlow bundle and everything is concerning the steps. I a

Answer 1

I'd suggest using Expression constraint. This constraint can be applied on form field or (preferably) in entity:

   /**
     * @var int
     * @Assert\Type(type="integer")
     */
    private $amountGiftCards25;

    /**
     * @var int
     * @Assert\Type(type="integer")
     * @Assert\Expression(expression="this.getAmountGiftCards25() > 0 or value > 0", message="Please choose amount of gift cards.")
     */
    private $amountGiftCards50;