How to add a new option to select entity - php

Question

I'm working on a view with lots of invoices.
Users can filter them by 'Customer', 'Date' and also by 'Referent'.
An invoice is linked to a customer, and a customer can have a 'referent' or not.
So in my 'referent' select list, the default value is 'All' to not filter by 'referent', and the rest is the list of all referents got by QueryBuilder.
Now, I need help to know how can I insert an option 'No Referent' in the select list to get all invoices for which the customer has no referent.
Here is my referent field in my 'InvoiceSearchType':
->add('referent', 'genemu_jqueryselect2_entity', array(
'label' => 'Referent',
'class' => 'GeocalUserBundle:User',
'query_builder' => function (UserRepository $ur) {
return $ur->getEmployesQueryBuilder();
},
'empty_value' => '',
'configs' => array(
'placeholder' => 'All',
'width' => '100%',
'allowClear' => true,
),
'required' => false,
))
Here, my QueryBuilder:
public function getEmployesQueryBuilder()
{
$queryBuilder = $this->createQueryBuilder('u')
->leftJoin('u.groups', 'g')
->where('u.enabled = 1')
->andWhere('g.id NOT IN(1)')
->orderBy('u.nom', 'ASC')
;
return $queryBuilder;
}
And I just display the field like that:
<td class="label">Chargé d'affaire</td>
<td colspan="2">{{ form_widget(form.referent) }}</td>
Thanks in advance ! :)

Answer 1

[SOLVED]
First I added a method which get the result (array) of the query, add another referent and return it:
public function getReferentWithNull()
{
// Get the list of referents
$referents = $this->doctrine->getRepository('GeocalUserBundle:User')->getEmployesQueryBuilder()->getQuery()->getResult();
// Create a new instance
$nobody = new User();
$nobody->setName("No Referent");
// Put it in the array result with the key -1
$referents[-1] = $nobody;
return $referents;
}
Then, I modified my form field type to 'choice' type and call my previous function:
->add('referent', 'genemu_jqueryselect2_choice', array(
'label' => 'Referent',
'choices' => $this->getReferentWithNull(),
'empty_value' => '',
'configs' => array(
'placeholder' => 'All',
'width' => '100%',
'allowClear' => true,
),
'required' => false,
))
Finally, I have my last option 'No Referent' with a key of -1.
Hope that it helps someone :)