Filament•2y ago

Filling default value in forms via relationship

So lets say I have Categories that have a single Menu. Is there a way to create a dummy record with menu_id pre-defined, so when I am creating it would just fetch based on a defined menu_id and fill a title from the Menu

    public static function form(Form $form): Form
    {
        $defaultMenuId = Route::current()->parameter('menu');

        return $form->schema([
            Forms\Components\Card::make([
                Forms\Components\Grid::make()
                    ->relationship('menu')
                    ->columns(0)
                    ->schema([
                        Forms\Components\TextInput::make('title')
                            ->dehydrated(false)     // prevent saving to database
                            ->label('Menu')
                            ->disabled()
                            ->required()
                    ]),
            Forms\Components\Hidden::make('menu_id')
                    ->default($defaultMenuId),

    public static function form(Form $form): Form
    {
        $defaultMenuId = Route::current()->parameter('menu');

        return $form->schema([
            Forms\Components\Card::make([
                Forms\Components\Grid::make()
                    ->relationship('menu')
                    ->columns(0)
                    ->schema([
                        Forms\Components\TextInput::make('title')
                            ->dehydrated(false)     // prevent saving to database
                            ->label('Menu')
                            ->disabled()
                            ->required()
                    ]),
            Forms\Components\Hidden::make('menu_id')
                    ->default($defaultMenuId),

In a regular Laravel I could just:

    $category = Category::make(['menu_id' => $defaultMenuId]);
    $category->menu->title;    // and reach title without category created in the database

    $category = Category::make(['menu_id' => $defaultMenuId]);
    $category->menu->title;    // and reach title without category created in the database

How would it be possible to achieve a similar logic in a filament? Thanks.

13 Replies

Unknown User•2y ago

Message Not Public

Dennis Koch•2y ago

I think you are looking for this https://filamentphp.com/docs/2.x/admin/resources/creating-records#customizing-the-creation-process

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CrylarOP•2y ago

Thanks. I think it's after user clicks "Create" button and data is about to get inserted into database but I need something where I could offer a dummy model with just menu_id before form is filled in CreatePage

Dennis Koch•2y ago

Why do you need the menu_id in the form?

CrylarOP•2y ago

I want to display disabled value as reference for the user, so he would be well informed for what menu category is getting created. 🙂 Hidden field in my example acts as relation ID and TextInput with dehydrate(true) is for user information.

CrylarOP•2y ago

so I was trying with fillForm now but something is still missing. This is called before form is loaded so I guess it's right spot to override.

CrylarOP•2y ago

form->fill pass menu_id in my example. I have looked at how EditPage does it. hidden field gets populated though 🙂

CrylarOP•2y ago

so this place receives data through fill but relationship is somehow not triggered

Dennis Koch•2y ago

Ah, you tried to prefill the relation by setting a menu_id field. That doesn't work. Not sure what's the best approach to prefill Layout relationships

CrylarOP•2y ago

This is not getting triggered on a create page load but not found what prevents it yet. :/

Dennis Koch•2y ago

Probably because there is usually no state on create You could try adding data inside mount()

CrylarOP•2y ago

yeh, I was following the hydrateState on the components right now and that's where it gets skipped

CrylarOP•2y ago

yeh so basically it gets cut off here because my dummy model is market as non existant

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Filling default value in forms via relationship