query builder select

[simplyniceweb]

So i have a query something like:

$this->createQueryBuilder('b')->addSelect(COUNT('something') as something) ->getQuery()->getResult();

I expect the result to be:

{
 {
    "id": 9,
    "something": "something value"
 }
}

What i get:

{
 "0": {
    "id": 9,
 },
 "something": "something value"
}

how can i achieve the result i want?