wiki/content/20201109150640-expression_constraint.md

id	title
4331b4ee-c987-4e04-8a46-3b8d30e13581	Expression Constraint

Syntax

use Symfony\Component\Validator\Constraints as Assert;

class Event
{
    /** @Assert\DateTime() */
    private $startDate;

    /**
     * @Assert\DateTime()
     * @Assert\Expression("value > this.startDate")
     */
    private $endDate;

    // ...
}

In Symfony 4.0 a new propertyPath option was added:

use Symfony\Component\Validator\Constraints as Assert;

class Event
{
    /** @Assert\DateTime() */
    private $startDate;

    /**
     * @Assert\DateTime()
     * @Assert\GreaterThan(propertyPath="startDate")
     */
    private $endDate;

    // ...
}