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how to use optgroup with array in blade in laravel

how to use optgroup with array in blade in laravel 5.3?

I use select2 in my project.

For Example:

<select class="form-control select2">
  <optgroup label="Top Airport">
    <option value="MHD">Mashhad</option>
    <option value="THR">Tehran</option>
  </optgroup>
  <optgroup label="All Airport">
    <option value="MHD">Mashhad</option>
    <option value="THR">Tehran</option>
    <option value="LON">London</option>
    .
    .
    .
  </optgroup>
</select>

In Controller:

public function index()
{
    $airport = Airport::where('status', 1)->pluck('city', 'iata');
    return view($this -> path_site_theme() . '.home.index', ['airport' => $airport]);
}

In index.blade.php:

{{ Form::select('from', ['Top Airport' => ['MHD', 'Mashhad', 'THR' => 'Tehran'], 'All Airport' => $airport], null, ['class' => 'form-control select2']) }}
Solution

  • The pluck method return an instance of Collection while the Form::select() expects an array. You can chain toArray() method on pluck to make it work. 

    $airport = Airport::where('status', 1)->pluck('city', 'iata')->toArray();

    Or better, use coalescing operator if you are using PHP7. It will never fail even if there's no active airports in database which happens a lot with toArray() when it tries to convert null into an array.

    $airport = Airport::where('status', 1)->pluck('city', 'iata')->toArray() ?? [];