Filament•6mo ago

Prefill Resource Create Fields from beforeFill()?

I'm looking to prefill some resource fields (when Creating a resource) using values from a cookie. Is the beforeFill() Life Cycle hook an appropriate place to do this? If so, how do I actually interact with the $form from inside this hook? Is there another more appropriate place to do this?

Creating records - Panel Builder - Filament

6 Replies

CGMOP•6mo ago

Digging in still, I was hoping this might work:

    protected function mutateFormDataBeforeFill(array $data): array
    {
        // dump($data);
        return $data;
    }
}

    protected function mutateFormDataBeforeFill(array $data): array
    {
        // dump($data);
        return $data;
    }
}

but I think this may only be for editing records? Is the only place to modify the initial values for a field the 'default()' method?

CGMOP•6mo ago

It looks like default() may indeed be the right place. Note that these defaults are only used when the form is loaded without existing data. Inside panel resources this only works on Create Pages, as Edit Pages will always fill the data from the model.

Getting started - Form Builder - Filament

LeandroFerreira•6mo ago

Yes, use default()

CGMOP•6mo ago

Thank you Leandro. This also just solved the other part of my issue. The fact this is a livewire component made everything else much cleaner/easier too.

public function mount(): void {
   // in Create<Resource>.php
}

public function mount(): void {
   // in Create<Resource>.php
}

Oh this is awesome! I can use $this->form->fill() in mount! Filament is amazing. I wish there was some intro documentation in regards to tightly integrated livewire is with Filament. This tiny epiphany just opened my eyes to what filament is capable of.

LeandroFerreira•6mo ago

You ask and you answer your question 😅

LeandroFerreira•6mo ago

https://filamentphp.com/docs/3.x/forms/adding-a-form-to-a-livewire-component/#adding-the-form

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

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Prefill Resource Create Fields from beforeFill()?