Merge remote-tracking branch 'origin/starling' into kusanagi

        if ($min !== null) {

            $qb->where('c.amount >= :min');

            $parameters['min'] = $min;

        }

            if ($max !== null) {

            $qb->where('c.amount >= :max');

                $qb->andWhere('c.amount <= :max');

                $parameters['max'] = $max;

            }

        } else if ($max !== null) {

            $qb->where('c.amount <= :max');

            $parameters['max'] = $max;

        }

        return array_map('current', $qb->getQuery()->setParameters($parameters)->getResult());

    }