Select multiple fields using createQueryBuilder() method in Sonata/Symfony2 - symfony

Question

I have a table that contains people's names in 3 fields: "lastname", "firstname", "middlename".
I need to get all 3 fields concatenated by the createQueryBuilder() method or somehow else.
My code looks like this:
$formMapper->add('collaborator', 'entity', array
(
'label' => 'acme.admin.person',
'empty_value' => '',
'class' => 'AcmeCoreBundle:Person',
'query_builder' => function ($repository) {
return $repository
->createQueryBuilder('p')
->where('p.status = 1')
->orderBy('p.lastname', 'ASC');
},
'property' => 'lastname'
)
);
Surely, now it only returns the "lastname".
How to modify it to get the result that i need?

Answer 1

One way is to define an unmapped property in your Person entity lets say $titleConcat now create a getter for the property and concat all 3 properties you want to show
protected $titleConcat;
public function getTitleConcat() {
return $this->firstname.' '.$this->middlename. ' ' . $this->lastname;
}
Now in your $formMapper object define 'property' => 'titleConcat'
$formMapper->add('collaborator', 'entity', array
(
'label' => 'acme.admin.person',
'empty_value' => '',
'class' => 'AcmeCoreBundle:Person',
'query_builder' => function ($repository) {
return $repository
->createQueryBuilder('p')
->where('p.status = 1')
->orderBy('p.lastname', 'ASC');
},
'property' => 'titleConcat'
)
);