Nelmio Alice Fixtures Provider : unique constraint on multiple properties

CombinationsGeneratorProvider.php

<?php
// src/Faker/Provider/CombinationsGeneratorProvider.php

namespace App\Faker\Provider;

use Faker\Provider\Base as BaseProvider;

/**
 * How to use : 
 * - generate a list of random list of all combinations with `<generateAllCombinations()>`
 * - set the result to a parameter of your fixtures
 * - get the value of the resource of one of the combinations
 */
final class CombinationsGeneratorProvider extends BaseProvider
{
    /**
     * @param array ...$datasets
     *
     * @return array
     */
    public function generateAllCombinations(array ...$datasets): array
    {
        $combinations = $this->generateCombinations($datasets);

        shuffle($combinations);

        return $combinations;
    }

    /**
     * @param array $datasets
     *
     * @return array
     */
    private function generateCombinations(array $datasets): array
    {
        $datasetA = array_shift($datasets);

        if (true === empty($datasets)) {
            return array_map(static function($item) {
                return [$item];
            }, $datasetA);
        }

        $combinations = [];

        foreach ($datasetA as $itemA) {
            $datasetB = $this->generateCombinations($datasets);
            foreach ($datasetB as $itemB) {
                $combinations[] = array_merge([$itemA], $itemB);
            }
        }

        return $combinations;
    }

    /**
     * @param array $combinations
     * @param int   $combinationIndex
     * @param int   $resourceIndex
     *
     * @return mixed
     */
    public function getCombinationValue(array $combinations, int $combinationIndex, int $resourceIndex)
    {
        return $combinations[$combinationIndex][$resourceIndex];
    }
}

resourceA.yaml

# fixtures/resourceA.yaml

stdClass:
    parameters:
        uniqueConstraintCombinations: '<generateAllCombinations(@resourceB_{1..12}, @resourceC_{1..4}, @resourceD_{1..35})>'

App\Entity\ResourceA:
    resourceA_{1..50}:
        name: '<word()>'
        resourceB: '<getCombinationValue(@parameters->uniqueConstraintCombinations, $current, 0)>'
        resourceC: '<getCombinationValue(@parameters->uniqueConstraintCombinations, $current, 1)>'
        resourceD: '<getCombinationValue(@parameters->uniqueConstraintCombinations, $current, 2)>'