Nested Relation Laravel - laravel

Question

class Airport extends Model{
public function flights(){
return $this->hasMany('App\Flights', 'flight_id', 'id');
}
}
class FlightInfo extends Model{
public function status(){
return $this->hasMany('App\FlightStatus', 'flight_info_id', 'id');
}
}
class FlightStatus extends Model{
public function flight_info(){
return $this->belongsTo(FlightInfo::class);
}
}
I'm trying to get all flights and its last status from one airport
example:
Airport::where('country_id', 10)->with(['flights.status' => function($q){$q->orderBy('last_update')->limit(1);}])
this give empty array for status collection
i've also tried
Airport::where('country_id', 10)->whereHas('flights.status', function ($q){$q->orderBy('last_update')->limit(1);})->with(['flights.status' => function($q){$q->orderBy('last_update')->limit(1);}])->get()
but same, empty array on status collection
I would like to retrieve this kind of result:
[
Airport_id: 2,
flights:[
id: 10,
airport_id: 2,
status: [ status_id: 1]
],
[ id: 15,
airport_id: 2,
status: [ status_id: 3]
],
any idea ?

Answer 1

If you want to do it via SQL you should use Joins. You have three different tables, so you must join them together and then you can apply the where conditions to reduce the data.
See related documentation: https://laravel.com/docs/9.x/queries#joins
If you have a small amount of data you could do it programmatically. (It's a dirty solution but may be enough for the given task).
You can get your Airport as a collection and the apply filter to remove unnecessary data.
See: https://laravel.com/docs/9.x/collections#method-filter
Use eager loading in this case to reduce the amount of db queries:
See: https://laravel.com/docs/9.x/eloquent-relationships#eager-loading