Filament Form: Dynamic additional_fields values not being saved properly

Hi everyone,

I'm having an issue with dynamic fields in Filament where values entered in the form are not being captured properly during the save process.

My setup:

I'm using a JSON column named
```
additional_fields
```
additional_fields
```
additional_fields
```
additional_fields
in my database
In ProductResource, I dynamically generate form fields based on product groups
These fields appear correctly in the form and I can enter values
When I submit the form, all values in these dynamic fields become null or empty strings

Here's my current implementation:

// In ProductResource
Section::make('Ek Bilgi Alanları')
    ->schema(fn(Get $get): array => self::getAdditionalFields($get('product_group_ids')))
    ->columns(2)
    ->statePath('additional_fields')
    ->dehydrated(true) 

// getAdditionalFields method
protected static function getAdditionalFields(?array $productGroupIds): array
{
    // ... get fields 
    
    return $additionalFields->map(function ($field) {
        $fieldKey = Str::snake($field->value ?: $field->field_name);
        
        $component = match ($field->field_type) {
            'free-text' => TextInput::make("additional_fields.{$fieldKey}")
                ->label($field->value ?: $field->field_name)
                ->default(''),

        };
        
        return $component;
    })->toArray();
Product Model
    public function setAdditionalFieldsAttribute($value)
    {
        $this->attributes['additional_fields'] = is_array($value) ? json_encode($value) : $value;
    }
    public function getAdditionalFieldsAttribute($value)
    {
        return json_decode($value, true) ?? [];
    }
}

// In ProductResource
Section::make('Ek Bilgi Alanları')
    ->schema(fn(Get $get): array => self::getAdditionalFields($get('product_group_ids')))
    ->columns(2)
    ->statePath('additional_fields')
    ->dehydrated(true) 

// getAdditionalFields method
protected static function getAdditionalFields(?array $productGroupIds): array
{
    // ... get fields 
    
    return $additionalFields->map(function ($field) {
        $fieldKey = Str::snake($field->value ?: $field->field_name);
        
        $component = match ($field->field_type) {
            'free-text' => TextInput::make("additional_fields.{$fieldKey}")
                ->label($field->value ?: $field->field_name)
                ->default(''),

        };
        
        return $component;
    })->toArray();
Product Model
    public function setAdditionalFieldsAttribute($value)
    {
        $this->attributes['additional_fields'] = is_array($value) ? json_encode($value) : $value;
    }
    public function getAdditionalFieldsAttribute($value)
    {
        return json_decode($value, true) ?? [];
    }
}

// In ProductResource
Section::make('Ek Bilgi Alanları')
    ->schema(fn(Get $get): array => self::getAdditionalFields($get('product_group_ids')))
    ->columns(2)
    ->statePath('additional_fields')
    ->dehydrated(true) 

// getAdditionalFields method
protected static function getAdditionalFields(?array $productGroupIds): array
{
    // ... get fields 
    
    return $additionalFields->map(function ($field) {
        $fieldKey = Str::snake($field->value ?: $field->field_name);
        
        $component = match ($field->field_type) {
            'free-text' => TextInput::make("additional_fields.{$fieldKey}")
                ->label($field->value ?: $field->field_name)
                ->default(''),

        };
        
        return $component;
    })->toArray();
Product Model
    public function setAdditionalFieldsAttribute($value)
    {
        $this->attributes['additional_fields'] = is_array($value) ? json_encode($value) : $value;
    }
    public function getAdditionalFieldsAttribute($value)
    {
        return json_decode($value, true) ?? [];
    }
}

// In ProductResource
Section::make('Ek Bilgi Alanları')
    ->schema(fn(Get $get): array => self::getAdditionalFields($get('product_group_ids')))
    ->columns(2)
    ->statePath('additional_fields')
    ->dehydrated(true) 

// getAdditionalFields method
protected static function getAdditionalFields(?array $productGroupIds): array
{
    // ... get fields 
    
    return $additionalFields->map(function ($field) {
        $fieldKey = Str::snake($field->value ?: $field->field_name);
        
        $component = match ($field->field_type) {
            'free-text' => TextInput::make("additional_fields.{$fieldKey}")
                ->label($field->value ?: $field->field_name)
                ->default(''),

        };
        
        return $component;
    })->toArray();
Product Model
    public function setAdditionalFieldsAttribute($value)
    {
        $this->attributes['additional_fields'] = is_array($value) ? json_encode($value) : $value;
    }
    public function getAdditionalFieldsAttribute($value)
    {
        return json_decode($value, true) ?? [];
    }
}

The form logs show:

[2025-03-06] local.INFO: Düzeltilmiş form verileri: {"name":"product name","product_group_ids":["1","2"],"additional_fields":{"cinsiyet":"","etiketler":"","fiyat":"","tema":""}}

Despite entering values in the form, they always come through as null.
Has anyone encountered this issue before? Any suggestions on how to properly capture values from dynamic fields?

Mehmet K.OP•3/6/25, 8:15 PM

I should also mention that when editing, the data is saved and comes in. This problem only occurs during the initial creation. https://codeshare.io/r4JJNq

Original message was deleted

Mehmet K.OP•3/7/25, 5:30 AM

Of course, I look forward to your help.

John•3/7/25, 7:47 AM

That getAdditionalFieldsAttributegetAdditionalFieldsAttribute and setAdditionalFieldsAttributesetAdditionalFieldsAttribute is old Laravel syntax. On which version are you? Is it still supported? You can simply add a cast to your model:

protected $casts = [
    'additional_fields' => 'array', // or 'json' which is an alias
];

protected $casts = [
    'additional_fields' => 'array', // or 'json' which is an alias
];

Also, you don't need to ->dehydrate(true)->dehydrate(true) and I don't know if that interferes with default behaviour. But maybe that's from testing stuff.

Filament Form: Dynamic additional_fields values not being saved properly

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