Symfony2 validation - first value is less than second - php

Question

I've got entity type of:
/**
* #ORM\Table(name="entity")
*/
class Entity
{
/**
* #var integer
*
* #ORM\Column(type="integer", nullable=true)
*/
private $value1;
/**
* #var integer
*
* #ORM\Column(type="integer", nullable=true)
*/
private $value2;
}
How to check with validation that $value1 is less than $value2?

Answer 1

You can use Expression constraint in your entity
use Symfony\Component\Validator\Constraints as Assert;
/**
* #ORM\Table(name="entity")
*/
class Entity
{
/**
* #var integer
* #Assert\Expression(
* "this.getValue2() < this.getValue1()",
* message="Value 1 should be less than value 2"
* )
* #ORM\Column(type="integer", nullable=true)
*/
private $value2;
}

Answer 2

Basically, as the cookbook explains extensively, you'll probably want to add the following to your entity:
use Symfony\Component\Validator\Constraints as Assert;
use Symfony\Component\Validator\Context\ExecutionContextInterface;
class Entity
{
//the values stay the same
/**
* #Assert\Callback
*/
public function validate(ExecutionContextInterface $context)
{
if ($this->value1 >= $this->value2)
{
$context->buildViolation('Value1 should be less than value2')
->atPath('value1')
->addViolation();
}
}
}