Question

This is similar to this question posted previously:
In Symfony2, should I use an Entity or a custom Repository

Lets say I have a car entity and a Wheels entity. A car has many wheels but a wheel has a single car.

In my controller I already have access to the car. I’m using the relation to get the wheels belonging to the car.

$car = $this->getCar();
$wheels= $car->getWheels();

The above works and gives me access to the wheels belonging to the current car. But instead of getting all wheels, I only need wheels where flat = 0.

Is there a better way than a repository to get the wheels belonging to the car entity where flat = 0?

I was thinking of creating a getter in the car entity (getNonFlatWheels) then filtering the wheels so that only the non flat wheels are returned.

Seems there would be a more standard solution.

Answer 1

I do not know your entities structure, but in a similar situation I use this snippet of code. You can try to put it in CarRepository class.

/**
 * Get all non flat wheels
 *
 * @return Result
 */
public function getNonFlatWheels()
{
    $em = $this->getEntityManager();

    $query = $em
            ->createQuery("
                SELECT g
                FROM Acme\DemoBundle\Entity\Car c
                JOIN c.wheels w
                WHERE w.flat = :flat
            ")
            ->setParameter('flat', 0);

    return $query->getResult();
}

I hope it will help you.