Self Join Query Doctrine 2 Zendframework 2 - doctrine-orm

Question

I am using Doctrine 2 ORM, Zendframework 2
Entity attribute in Role Entity look like this
/**
*
* #ORM\Column(type="string")
*/
protected $name;
/**
*
* #ORM\OneToMany(targetEntity="\Application\Entity\Role", mappedBy="parent")
*/
protected $children;
/**
*
* #ORM\ManyToOne(targetEntity="\Application\Entity\Role", inversedBy="children")
*
*/
protected $parent;
Mysql Table look like this.
Result I am looking for is an array.
One thing is critical, Any entry in array before apprearing in value must be added as key,
So order is very important.
i.e [site-manager] => guest can't come as first entry(0 index) if [guest] => will not exist before it becaause guest(value) does not exist in array as key
so [guest] => will come first even if it is entered as second record in table
Array(
[guest] =>
[site-manager] => guest
[company-manager] => site-manager
[member] => guest
[staff] => member
[internalstaff] => member
[sales] => staff
[manager] => sales,internalstaff
[admin] => manager
)
I am running this code in my controller which is returning empty array
$qb = $objectManager->createQueryBuilder();
$qb->select('r, p')
->from('\Application\Entity\Role', 'r')
->innerJoin('r.parent','p', 'with','p.id = r.id')
//->where('b.id = ?1')
->orderBy('r.id', 'ASC');
$data = $qb->getQuery()->getArrayResult();
Any help will be appreciated

Answer 1

One solution could be
$qb = $objectManager->createQueryBuilder();
$qb->select('r.name', 'c.name as children')
->from('\Application\Entity\Role', 'r')
->join('r.parent','c');
$data = $qb->getQuery()->getArrayResult();
$refine = array();
foreach ($data as $v)
{
if(is_array($v))
{
if(array_key_exists($v["children"], $refine)){
$refine[$v["name"]][] = $v["children"];
} else {
$refine[$v["children"]] = array();
$refine[$v["name"]][] = $v["children"];
}
}
}
print_r($refine);
Will return following
Array
(
[guest] => Array
(
)
[site-manager] => Array
(
[0] => guest
)
[company-manager] => Array
(
[0] => site-manager
)
[member] => Array
(
[0] => guest
)
[staff] => Array
(
[0] => member
)
[internalStaff] => Array
(
[0] => member
)
[sales] => Array
(
[0] => staff
)
[manager] => Array
(
[0] => internalStaff
[1] => sales
)
[admin] => Array
(
[0] => manager
)
)
You can use implode function if you wish to flatten inner array