orderBy on whereHas query in Laravel 4.2

Question

how can I sort the return data from a query using whereHas ? In my query i have to get the users data which id exist on interest table but i need to sort it using the datetime column from interest . But, the return query do not sort the data at all.

Here's my code snippets in case it would help you understand my problem.

Model (name: User)

//***relationship***//
public function interest(){
     return $this->belongsTo('Interest','id','interest_by');
}

Controller

$userInterested = User::whereHas('interest',function($q) use ($id) {
     return $q->where('interest_on', $id)
              ->orderBy('datetime');
});
$userQuery = $userInterested->get();
return $userQuery;

Answer 1

remove return from where has and try this.like

$userInterested = User::whereHas('interest',function($q) use ($id) {
  $q->where('interest_on', $id)
          ->orderBy('datetime');
 })->get();
 return $userInterested;

Answer 2

$userInterested = User::whereHas('interest',function($q) use ($id) {
     return $q->where('interest_on', $id);
})->orderBy('datetime');
$userQuery = $userInterested->get();
return $userQuery;