通过Symfony中的条件查询相关实体（学说）

Question

For this question you need to know about 2 entities :
Loan and Charge. One Loan has Multiple Charges.
So, in my controller, I am querying for each entity and it seems to be lame.

$query = $this->getDoctrine()
    ->getRepository('AppBundle:Loan')
    ->find($id);

$query1 = $em->createQuery(
'SELECT p
FROM AppBundle:Charge p
WHERE p.loanId = :loanId
AND p.isActive = true
')->setParameter('loanId', $id);

I want to transform query1 in smth better, using relationship.
So, from my point of view it must be smth like :

    foreach($query->getCharges() as $charge) {
     if($charge->getIsActive() == true) {
      //what to put here?
     }
  }

If condition passes, how can I obtain the same object that came from DB from my first code?

Answer 1

You can create an extra method on your Loan class that uses ArrayCollections::filter :

public function getActiveCharges()
{
    return $this->getCharges()->filter(function (Charge $charge) {
        return $charge->getIsActive() === true;

        //or you can omit '=== true'
        return $charge->getIsActive();
    });
}