F
Filament•4d ago
ambonboy.

Form field value based on 2 other fields

Docs show how to generate the value of a slug field. And shoes how to test against the old value of the field before changing it. How to fill the value of a field based on the values of 2 other fields? And only fill the third field if it is empty: don't change it if it already has value.
Solution:
Solved: My problem was in the Helper function. It wasn't returning....
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4 Replies
mmoollllee
mmoollllee•4d ago
Can you provide a real example with the "other fields" to help you precicely?
Mohamed Ayaou
Mohamed Ayaou•4d ago
You can just use a combination of Get, Set, and afterStateUpdated: this is an example from the docs: https://filamentphp.com/docs/3.x/forms/advanced#generating-a-slug-from-a-title
Advanced forms - Form Builder - Filament
ambonboy.
ambonboy.OP•4d ago
Here is the code I tried on the basis of the 'generating-a-slug-from-a-title' example in docs. The idea is that the field src_code will be generated by a helper function based on two other fields: leader, a string and execdir_id, an int. I don't know what is happening, but the first one works (leader) but nothing seems to happen when I change the execdir_id field (it is a select drop down). It eventually gives a max execution time exceeded error in the background. 
  ->schema([
                Forms\Components\TextInput::make('src_code')
                Forms\Components\TextInput::make('leader')
                    ->label('Group Leader')
                    ->required()
                    ->live(onBlur: true)
                    ->afterStateUpdated(function (Get $get, Set $set) {
                        $src = Helpers::generateSrcCode($get('execdir_id'), $get('leader'));
                        $set('src_code', $src);
                    })
                Forms\Components\Select::make('execdir_id')
                    ->label('Executive Director of this group')
                    ->options(function () {
                        return User::where('status', 'like', '%execdir%')->get()->pluck('name', 'id');
                    })
                    ->live(onBlur: true)
                    ->afterStateUpdated(function (Get $get, Set $set) {
                        $src = Helpers::generateSrcCode($get('execdir_id'), $get('leader'));
                        $set('src_code', $src);
                    })
                    ->required()
  ->schema([
                Forms\Components\TextInput::make('src_code')
                Forms\Components\TextInput::make('leader')
                    ->label('Group Leader')
                    ->required()
                    ->live(onBlur: true)
                    ->afterStateUpdated(function (Get $get, Set $set) {
                        $src = Helpers::generateSrcCode($get('execdir_id'), $get('leader'));
                        $set('src_code', $src);
                    })
                Forms\Components\Select::make('execdir_id')
                    ->label('Executive Director of this group')
                    ->options(function () {
                        return User::where('status', 'like', '%execdir%')->get()->pluck('name', 'id');
                    })
                    ->live(onBlur: true)
                    ->afterStateUpdated(function (Get $get, Set $set) {
                        $src = Helpers::generateSrcCode($get('execdir_id'), $get('leader'));
                        $set('src_code', $src);
                    })
                    ->required()
Solution
ambonboy.
ambonboy.•4d ago
Solved: My problem was in the Helper function. It wasn't returning.

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