Form with Custom Fields

The main logic here lives in our CustomerResource classes form() method:

• We are using a Repeater to create a dynamic number of fields
• We are using a Pivot model to enable our Many-to-Many relationship between Customer and Field models
• We are turning off fields as soon as they are selected to prevent duplicates

Here's how that looks in our code:

app/Models/Field.php

class Field extends Model
{
    protected $fillable = [
        'name',
    ];
}

app/Models/CustomerField.php

use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\Relations\Pivot;
 
class CustomerField extends Pivot
{
    public function customer(): BelongsTo
    {
        return $this->belongsTo(Customer::class);
    }
 
    public function field(): BelongsTo
    {
        return $this->belongsTo(Field::class);
    }
}

Remember that this Model is required for the Repeater to work, as it's a Many-to-Many relationship. That's a Filament requirement.