Filament: Quiz Application

We have two Filament resources for managing quizzes and questions. Only admin users can access these two resources. Permissions are done via policies.

app/Policies/QuizPolicy.php:

use App\Models\Quiz;
use App\Models\User;
use Illuminate\Auth\Access\HandlesAuthorization;
 
class QuizPolicy
{
    use HandlesAuthorization;
 
    public function viewAny(User $user): bool
    {
        return (bool) $user->is_admin;
    }
 
    public function view(User $user, Quiz $quiz): bool
    {
        return $quiz->is_published || $user->is_admin;
    }
 
    public function create(User $user): bool
    {
        return $user->is_admin;
    }
 
    public function update(User $user, Quiz $quiz): bool
    {
        return $user->is_admin;
    }
 
    public function delete(User $user, Quiz $quiz): bool
    {
        return $user->is_admin;
    }
}

app/Policies/QuestionPolicy.php:

use App\Models\User;
use App\Models\Question;
use Illuminate\Auth\Access\HandlesAuthorization;
 
class QuestionPolicy
{
    use HandlesAuthorization;
 
    public function viewAny(User $user): bool
    {
        return (bool) $user->is_admin;
    }
 
    public function view(User $user, Question $question): bool
    {
        return $user->is_admin;
    }
 
    public function create(User $user): bool
    {
        return $user->is_admin;
    }
 
    public function update(User $user, Question $question): bool
    {
        return $user->is_admin;
    }
 
    public function delete(User $user, Question $question): bool
    {
        return $user->is_admin;
    }
}

The question form is extracted to a separate Schema class for reuse in the quiz resource. When creating a new question, you can also select a quiz in the QuestionResource on the edit page.

app/Filament/Resources/Questions/QuestionResource.php:

use Filament\Schemas\Schema;
use App\Models\Question;
use Filament\Resources\Resource;
use Filament\Tables\Table;
use App\Filament\Resources\Questions\Schemas\QuestionForm;
use App\Filament\Resources\Questions\Tables\QuestionsTable;
use Filament\Support\Icons\Heroicon;
 
class QuestionResource extends Resource
{
    protected static ?string $model = Question::class;
 
    protected static string | \BackedEnum | null $navigationIcon = Heroicon::OutlinedRectangleStack;
 
    public static function form(Schema $schema): Schema
    {
        return QuestionForm::configure($schema);
    }
 
    public static function table(Table $table): Table
    {
        return QuestionsTable::configure($table);
    }
 
    // ...
}

app/Filament/Resources/Questions/Schemas/QuestionForm.php:

use Filament\Schemas\Schema;
use Filament\Forms\Components\Select;
use Filament\Forms\Components\Textarea;
use Filament\Forms\Components\Repeater;
use Filament\Forms\Components\Checkbox;
use Filament\Forms\Components\TextInput;
 
class QuestionForm
{
    public static function configure(Schema $schema): Schema
    {
        return $schema
            ->components(array_merge(
                self::questionForm(),
                [
                    Select::make('quiz_id')
                        ->multiple()
                        ->columnSpanFull()
                        ->visibleOn('edit')
                        ->relationship('quizzes', 'title')
                ])
            );
    }
 
    public static function questionForm(): array
    {
        return [
            Textarea::make('question_text')
                ->required()
                ->columnSpanFull(),
            Repeater::make('questionOptions')
                ->required()
                ->relationship()
                ->columnSpanFull()
                ->schema([
                    TextInput::make('option')
                        ->required()
                        ->hiddenLabel(),
                    Checkbox::make('correct'),
                ])->columns(),
            Textarea::make('code_snippet')
                ->columnSpanFull(),
            Textarea::make('answer_explanation')
                ->columnSpanFull(),
            TextInput::make('more_info_link')
                ->columnSpanFull(),
        ];
    }
}

You can also create questions while creating a quiz in the Quiz form. This is where we reuse the question form.