Doctrine\ODM\MongoDB\SchemaManager::isMongoIndexEquivalentToDocumentIndex PHP Метод

    public function isMongoIndexEquivalentToDocumentIndex($mongoIndex, $documentIndex)
    {
        $documentIndexOptions = $documentIndex['options'];
        if ($mongoIndex['key'] != $documentIndex['keys']) {
            return false;
        }
        if (empty($mongoIndex['sparse']) xor empty($documentIndexOptions['sparse'])) {
            return false;
        }
        if (empty($mongoIndex['unique']) xor empty($documentIndexOptions['unique'])) {
            return false;
        }
        if (!empty($mongoIndex['unique']) && empty($mongoIndex['dropDups']) && !empty($documentIndexOptions['unique']) && !empty($documentIndexOptions['dropDups'])) {
            return false;
        }
        foreach (array('bits', 'max', 'min') as $option) {
            if (isset($mongoIndex[$option]) xor isset($documentIndexOptions[$option])) {
                return false;
            }
            if (isset($mongoIndex[$option]) && isset($documentIndexOptions[$option]) && $mongoIndex[$option] !== $documentIndexOptions[$option]) {
                return false;
            }
        }
        if (empty($mongoIndex['partialFilterExpression']) xor empty($documentIndexOptions['partialFilterExpression'])) {
            return false;
        }
        if (isset($mongoIndex['partialFilterExpression']) && isset($documentIndexOptions['partialFilterExpression']) && $mongoIndex['partialFilterExpression'] !== $documentIndexOptions['partialFilterExpression']) {
            return false;
        }
        return true;
    }