How to retrieve child records from database using Symfony2? - symfony

Question

I have two tables, a map_families table and a map_contacts table. There is a one to many relationship between these two tables and when a Family record is displayed I'd like to display any child records it has from the map_contacts table.
At the moment though, I have this code:
$familylist = $dm->createQuery('
SELECT mf.id, mf.surname, mf.firstName, mf.email, mf.phone, mc.id AS memID, mc.firstName AS memFirstName, mc.surname AS memSurname
FROM MyBundle:MapFamilies mf
LEFT JOIN MyBundle:MapContacts mc WHERE mf.id = mc.family
WHERE mf.centre = :centre
ORDER BY mf.surname ASC, mf.firstName ASC'
)->setParameter('centre', $centre);
$famlist = $familylist->getResult();
And this gives the following result:
Array
(
[0] => Array
(
[id] => 4
[surname] => Kentucky
[firstName] => John
[email] => email#somewhere.com
[phone] => 0123 456 7890
[memID] => 2
[memFirstName] => Jason
[memSurname] => Kentucky
)
[1] => Array
(
[id] => 4
[surname] => Kentucky
[firstName] => John
[email] => email#somewhere.com
[phone] => 0123 456 7890
[memID] => 3
[memFirstName] => Michael
[memSurname] => Kentucky
)
)
But what I'm trying to get is something like this:
Array
(
[0] => Array
(
[id] => 4
[surname] => Kentucky
[firstName] => John
[email] => email#somewhere.com
[phone] => 0123 456 7890
[members] => Array
(
[0] => Array
(
[memID] => 2
[memFirstName] => Mick
[memSurname] => Burke
),
[1] => Array
(
[memID] => 3
[memFirstName] => John
[memSurname] => Burke
)
)
)
)
How can I do this through Symfony2?

Answer 1

To do what you're after in querybuilder.
$qb = $this->getEntityManager()->createQueryBuilder();
$result = $qb->select('mf, mc')
->from('MyBundle:MapFamilies', 'mf')
->join('mf.mapContacts', 'mc')
->where('mf.centre = :centre')
->setParameter('centre', $centre)
->getQuery()->getArrayResult();
This will give you an array of MapFamily, with their relevant MapContact entities.
I took a guess at your property name for MapFamily -> MapContact so you might need to change that.