Eloquence\Behaviours\Cacheable::updateCacheRecord PHP Method

    public function updateCacheRecord(array $config, $operation, $amount, $foreignKey)
    {
        if (is_null($foreignKey)) {
            return;
        }
        $config = $this->processConfig($config);
        $sql = DB::table($config['table'])->where($config['key'], $foreignKey);
        /*
         * Increment for + operator
         */
        if ($operation == '+') {
            return $sql->increment($config['field'], $amount);
        }
        /*
         * Decrement for - operator
         */
        return $sql->decrement($config['field'], $amount);
    }