Symfony Form times out when trying to populate $form object - symfony

Question

The below Symfony form works fine in development when I only have a few records of each entity in the database. However, once I connect it to an extract of my production database the page times out.
The size of the database tables in this extract are bigger (around 800 records each) but nothing to justify it timing out completely. I'm assuming that the problem is a misunderstanding of how best to populate $batch in
The controller:
public function batchInvoicesAction(Request $request)
{
$em = $this->getDoctrine()->getManager();
$members = $em->getRepository('AppBundle:Member')->findActiveMembers();
$batch = new InvoiceBatch();
foreach ($members as $member) {
$invoice = new Invoice();
$invoice->setMemberId($member);
$invoice->setSelected(True);
$invoice->setCreatedate(new \Datetime());
$invoice->setAmount($member->getDefaultinvoiceamount());
$invoice->setCurrency($member->getDefaultinvoicecurrency());
$invoice->setinvoicebatchid($batch);
$batch->addInvoiceId($invoice);
# exit(VarDumper::dump($batch));
}
$form = $this->createForm(InvoiceBatchType::class, $batch);
$form->handleRequest($request);
if ($form->isSubmitted() && ($form->isValid())) {
$batchform = $form->getData();
foreach ($batchform->getInvoiceids() as $invoiceform) {
if ($invoiceform->getSelected() == False) {
$batchform->removeInvoiceId($invoiceform);
} else {
$em->persist($invoiceform);
}
}
$em->persist($batchform);
$em->flush();
return $this->redirectToRoute('view_monthly_invoices');
}
return $this->render('invoices/new.batch.invoice.html.twig', array(
'page_title' => 'Invoices',
'message' => 'Batch loading of invoices',
'form' => $form->createView(),
));
}
The repository function code is:
public function findActiveMembers()
{
return $this->getEntityManager()
->createQuery
(
'SELECT m
FROM AppBundle:Members m
WHERE m.active= :active
ORDER BY m.familyname1, m.familyname2, m.firstname'
)
->setParameter('active' ,true)
->getResult();
}
In case it's of any help:
1. Vardump of the partial $batch:
{#1022 ▼
#id: null
#invoice_ids: ArrayCollection {#1023 ▼
-elements: array:1 [▼
0 => Invoice {#1024 ▼
#id: null
#invoicebatch_id: InvoiceBatch {#1022}
#member_id: Member {#1049 ▶}
#payment_ids: ArrayCollection {#1027 ▶}
#attendc_ids: ArrayCollection {#1025 ▶}
#attende_ids: ArrayCollection {#1044 ▶}
#bankreceipt: null
#aggregate_payment: 0
#selected: true
#amount: "0.00"
#currency: "S"
#invoicedate: null
#createdate: DateTime {#19571 ▶}
#modifydate: null
#billedmonth: null
#description: null
}
]
}
2. My custom formTypes - this may be the problem as I'm still trying to get my head around FormTypes. The page only has one InvoiceBatchType which has an array of Invoice_ids used as CollectionType with InvoiceForBulkType:
class InvoiceBatchType extends AbstractType
{
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('batchevent', TextType::class, array(
))
->add('invoice_ids', CollectionType::class, array(
'entry_type' => InvoiceForBulkType::class,
))
;
}
/* ... */
}
class InvoiceForBulkType extends AbstractType
{
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('selected', CheckboxType::class, array(
'label' => ' ',
'required' => false,
))
->add('member_id', EntityType::class, array(
'class' => 'AppBundle:Member',
'choice_label' => 'FullName',
'label'=>'Member',
'disabled'=>true,
)
)
->add('amount', TextType::class, array(
'label' => 'Amount',
))
->add('currency',ChoiceType::class, array(
'choices' => array('Soles' => 'S', 'Dollars' => 'D'),
'choices_as_values' => true,
))
->add('invoicedate', DateType::class, array(
'widget' => 'single_text',
'data' => new \DateTime('now'),
'format' => 'dd/MMM/yyyy',
'label' => 'Date of invoice',
'attr'=> array(
'class'=>'datepicker',
)
))
->add('description', TextType::class, array(
'required'=>false,
))
;
}
/*...*/
}