What is the advantage of this over #11673? Isn't it basically the same use-case?

@xabbuh This validates against two date fields that are both user supplied. I just looked at #11673 right now and don't see a way to make the date to check against dependent on another field, unless I missed it?

I added a use-case in the description.

Hi @bezhermoso, thank you for submitting that PR! :)

You can already use the Expression constraint to solve your use case:

/**
 * @Assert\Expression("this.startDate < this.endDate")
 */
class Event
{
      private $startDate;
      private $endDate;
}

Hope this helps! :)

@webmozart Wow its amazing what the ExpressionLanguage component can do! :)

I'm curious: how about enforcing the interval between dates?

Using the appropriate DateTime methods should work:

/**
 * @Assert\Expression("this.startDate.modify('+1 month') < this.endDate")
 */

@webmozart I would assume ExpressionLanguage would not actually alter the value within the object? AFAIK DateTime#modify will change the object, not return a new one.

@bezhermoso Ah right, you'd need a DateTimeImmutable for that. Well then you can also use a Callback:

/**
 * @Assert\Callback
 */
public function validateDateRange(ExecutionContextInterface $context)
{
    $startDate = clone $this->startDate;

    if ($this->endDate < $startDate->modify('+1 month')) {
        $context->addViolation('The end date is too soon!');
    }
}

@webmozart Gotcha! That works, too. Thanks!