live search with php (laravel framework)

search_controller.php

use Illuminate\Database\Eloquent\Builder; // JANGAN LUPA INCLUDE ELOQUENT BUILDER

return view('some_view', [

// LEMPAR QUERY SEARCH SEBELUMNYA
    'search' => request()->search,

// MENGGUNAKAN FUNCTION WHEN, CHECK: https://laravel.com/docs/8.x/collections#method-when
// MENGGUNAKAN FUNCTION WHEREHAS, CHECK: https://laravel.com/docs/8.x/eloquent-relationships#querying-relationship-existence
    'models' => Model::when(request()->search, function($qwr) {
                        $qwr->whereHas('child_relation', function (Builder $query) {
                                $query->where('column_name', 'LIKE', '%' . request()->search . '%')
                                      ->orWhere('column_name_2', 'LIKE', '%' . request()->search . '%');
                            })
                            ->orWhereHas('child_relation.grandchild_relation', function (Builder $query) {
                                $query->where('column_name', 'LIKE', '%' . request()->search . '%')
                                      ->orWhere('column_name_2', 'LIKE', '%' . request()->search . '%');
                            })
                    })->paginate(10)
]);

search_view.blade.php

// FORM SEARCH
// METHOD: GET
// ACTION TO ROUTE CONTROLLER SERACH

<form action="{{ route('search_controller') }}" method="GET">

      // INPUT SERACH DENGAN VALUE SERACH VARIABLE SEBELUMNYA YANG DILEMPAR MELALUI CONTROLLER
      <input name="search" type="text" value="{{ $search }}">
      
      // BUTTON SEARCH
      <button type="submit">Pencarian</button>
<form>

// MENULIS DATA DI DATATABLE
<table>
    <thead>
        <tr>
            <th class="align-middle text-center">Kolom</th>
        </tr>
    </thead>
    <tbody>
        @foreach($models as $model)
            <tr>
                <td>{{$model->column_name}}</td>
            </tr>
        @endforeach
    </tbody>
</table>

// PAGINATION LINK, CHECK: https://laravel.com/docs/8.x/pagination#displaying-pagination-results
// MENYERTAKAN QUERY STRING SEBELUMNYA, CHECK: https://laravel.com/docs/8.x/pagination#displaying-pagination-results
{{ $models->appends(request()->query())->links() }}