Symfony2 sublevel query

Question

I'm trying to get a list of flights from a search form. User picks a city, a number of passengers, and my query returns all available flights.

I tried this one :

public function findSearch($city, $nbpax)
{
    $qb = $this->createQueryBuilder('a');

    $qb->where('a.precisedate >= :now')
        ->setParameter('now', new \DateTime())
        ->andWhere('a.available > :min')
        ->setParameter('min', $nbpax)
        ->andWhere('a.departure > :min')
        ->setParameter('min', $nbpax)
        ->andWhere('a.departure.city = :city')
        ->setParameter('city', $city)
        ->orderBy('a.precisedate', 'ASC')
    ;

    return $qb
        ->getQuery()
        ->getResult()
        ;
}

But it seems like the a.departure.city is not recognised as a valid comparison (departure is an airport, linked to a city with a OneToMany relationship)

How can I change my query so that I can access the airport city ?

Answer 1

You could probably do a join on departure prior to the comparisons, so:

$qb->join('a.departure', 'd')

And then instead of a.departure you'd just do d , eg

->andWhere('d.city = :city')

The part I don't understand is the a.departure > :min clause, what field on a departure entity are you comparing against? Or is departure a field? In which case the a.departure.city = :city doesn't make sense.

Regardless, the DQL documentation on joins is a good source of reference.