Trying to add a calculated distance to Eloquent - laravel-5

Question

I am trying to add a distance calculated inside a Model::get() method. The distance should be marked as "distance", while now it returns nothing (no added select).
Here is my Eloquent Query :
`
Candidate::whereHas('positions', function($query) use ($data) {
$query->where('positions.id', $data['position']);
})
->whereHas('user', function($query) use ($data) {
$query->where('status', '=', 1);
if($data['lat'] !== null and $data['lng'] !== null){
$query->whereHas('address', function($query) use ($data) {
$sqlDistance = DB::raw('( 111.045 * acos( cos( radians(' . $data['lat'] . ') ) * cos( radians( addresses.latitude ) )
* cos( radians( addresses.longitude ) - radians(' . $data['lng'] . ') )
+ sin( radians(' . $data['lat'] . ') ) * sin( radians( addresses.latitude ) ) ) )');
$query->selectRaw("{$sqlDistance} AS distance");
});
}
})->with('user.address','user','user.media')
->get();
`
Here is what I get :
Any help would be appreciated. Thanks

Answer 1

I am trying to find the business distance from user's current location.
$request->latitude & $request->longitude is user's current location which will be pass in request and I have already stored business's location in database column named latitude & longitude. selectSub() is used to add column in data records. It will contain two arguments first it will be function or column name and the second one will be a new column name.
Business::with(['user','category'])
->select('*')
->selectSub('(111.111 *
DEGREES(ACOS(LEAST(1.0, COS(RADIANS(latitude))
* COS(RADIANS('.$request->latitude.'))
* COS(RADIANS(longitude - '.$request->longitude.'))
+ SIN(RADIANS(latitude))
* SIN(RADIANS('.$request->latitude.'))))))','distance_in_km')
->orderBy('distance_in_km','ASC')
->take($limit)
->skip($offset)->get();
Here is my working code in laravel

Answer 2

The Solution is a mix between Eloquent and Query Builder :
`
Candidate::select('candidates.*')
->whereHas('positions', function ($query) use ($data) {
$query->where('positions.id', $data['position']);
})
->whereHas('user', function ($query) use ($data) {
$query->where('status', '=', 1);
$query->whereHas('address', function ($query) use ($data) {
if($data['country'] !== null){
$query->where('country', '=', $data['country']);
}
});
})
->leftJoin('users', 'users.id', 'candidates.user_id')
->with('user.address', 'user', 'user.media','reviews')
->leftJoin('addresses', 'addresses.id', 'users.address_id')
->addSelect(DB::raw("{$sqlDistance} AS distance") )
->get();
`