laravel query when

// Retrieve a model by its primary key...
$flight = App\Models\Flight::find(1);

// Retrieve the first model matching the query constraints...
$flight = App\Models\Flight::where('active', 1)->first();

// Shorthand for retrieving the first model matching the query constraints...
$flight = App\Models\Flight::firstWhere('active', 1);

$users = DB::table('users')
                ->when($role, function ($query, $role) {
                    $query->where('role_id', $role);
                })
                ->get();

return Destination::orderByDesc(
    Flight::select('arrived_at')
        ->whereColumn('destination_id', 'destinations.id')
        ->orderBy('arrived_at', 'desc')
        ->limit(1)
)->get();

<?php

$flights = App\Models\Flight::all();

foreach ($flights as $flight) {
    echo $flight->name;
}