Custom symfony constraint.

CustomLength

<?php

namespace MainBundle\Validator\Constraints;

use Symfony\Component\Validator\Constraint;

/** @Annotation */
class CustomLength extends Constraint
{
	// Define all annotation parameters;
	/**
	 * @var string
	 */
	public $minMessage;

	/**
	 * @var string
	 */
	public $maxMessage;

	/**
	 * @var integer
	 */
	public $min;

	/**
	 * @var integer
	 */
	public $max;

	/**
	 * @return string
	 *
	 * Use service name: custom_length_validator
	 */
	public function validatedBy()
	{
		return 'custom_length';
	}
}

CustomLengthValidator

<?php

namespace MainBundle\Validator\Constraints;

use Symfony\Component\Validator\Constraint;
use Symfony\Component\Validator\ConstraintValidator;

class CustomLengthValidator extends ConstraintValidator
{
	public $minMessage = "Min data = {{ data }}";
	public $maxMessage = "Max data = {{ data }}";

	/**
	 * @param mixed $value
	 * @param Constraint $constraint
	 */
	public function validate($value, Constraint $constraint)
	{
		// Get value from annotation.
		$min = $constraint->minMessage;
		$max = $constraint->maxMessage;

		// Set default value.
		if ($min === null) {
			$min = $this->minMessage;
		}

		if ($max === null) {
			$max = $this->maxMessage;
		}

		// Min value.
		if (($value < $constraint->min) && ($constraint->min !== null)) {
			$this->context->buildViolation($min)
				->setParameter('{{ data }}', $constraint->min)
				->addViolation();
		}
		// Max value.
		elseif (($value > $constraint->max) && ($constraint->max !== null) ) {
			$this->context->buildViolation($max)
				->setParameter('{{ data }}', $constraint->max)
				->addViolation();
		}
	}
}

Entity

/**
 * @ORM\Column(type="string", nullable=false)
 * @CustomAssert\CustomLength(
 *     min = 2,
 *     max = 5,
 *     minMessage = "Minimal value = {{ data }}",
 *     maxMessage = "Maximal value = {{ data }}",
 * )
 */
private $test;

service

services:
    custom_length_validator:
        class: MainBundle\Validator\Constraints\CustomLengthValidator
        tags:
            - { name: validator.constraint_validator, alias: custom_length }