Filament•2w ago

Custom page with a wizard form

Ok only started using Filament this week, so forgive me if I'm missing something very basic. I'm trying to create a custom page with a wizard form component. I've got that working but when I try to add a select to the first page of the wizard based on a relationship in the model I get an error message

Call to a member function isRelation() on null

Call to a member function isRelation() on null

Solution:

The $model property is only (I think) used on Resources. If you're creating a custom page that interacts with a single record, you need a way to bind it to a specific record, so you need to set ->model() on the form itself

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4 Replies

Bardolf#6969•2w ago

This is my custom page as it stands

class RegistrationWizard extends Page implements HasForms
{
    use InteractsWithForms;

    protected static ?string $model = User::class;

    protected static ?string $navigationIcon = 'heroicon-o-document-text';

    protected static string $view = 'filament.pages.registration-wizard';

    public $is_partner_student = false;

    public function mount()
    {
        $this->form->fill();
    }

    public function form(Form $form): Form
    {
        return $form
            ->schema([
                Wizard::make([
                    Wizard\Step::make('Degree Information')
                        ->schema([
                            Radio::make('is_partner_student')
                                ->label('Were you referred by one of our partners?')
                                ->inline()
                                ->boolean()
                                ->live(),
                            Select::make('partner')
                                ->hidden(fn (Get $get): bool => !$get('is_partner_student'))
                                ->relationship('partner', 'name'),
                        ]),
                ])->submitAction(new HtmlString(Blade::render('components.submit')))
            ]);
    }
}

class RegistrationWizard extends Page implements HasForms
{
    use InteractsWithForms;

    protected static ?string $model = User::class;

    protected static ?string $navigationIcon = 'heroicon-o-document-text';

    protected static string $view = 'filament.pages.registration-wizard';

    public $is_partner_student = false;

    public function mount()
    {
        $this->form->fill();
    }

    public function form(Form $form): Form
    {
        return $form
            ->schema([
                Wizard::make([
                    Wizard\Step::make('Degree Information')
                        ->schema([
                            Radio::make('is_partner_student')
                                ->label('Were you referred by one of our partners?')
                                ->inline()
                                ->boolean()
                                ->live(),
                            Select::make('partner')
                                ->hidden(fn (Get $get): bool => !$get('is_partner_student'))
                                ->relationship('partner', 'name'),
                        ]),
                ])->submitAction(new HtmlString(Blade::render('components.submit')))
            ]);
    }
}

Tetracyclic•2w ago

In order to access a relationship, you need to set the related $model on the form: https://filamentphp.com/docs/3.x/forms/adding-a-form-to-a-livewire-component#setting-a-form-model

Adding a form to a Livewire component - Form Builder - Filament

Bardolf#6969•2w ago

@Ross Bearman isn't that what this line is doing?

protected static ?string $model = User::class;

protected static ?string $model = User::class;

Solution

Tetracyclic•2w ago

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Custom page with a wizard form