get several values ​separated by , and save line by line in the database - laravel-nova

Question

I have an input, and I want to extract several numbers separated by , and store each number on each new line in the database.
model - CouponDocument
<?php
namespace App\Models;
use App\Http\Controllers\CouponDocumentController;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\Relations\BelongsToMany;
use Illuminate\Database\Eloquent\Relations\HasMany;
use Illuminate\Database\Eloquent\SoftDeletes;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Str;
class CouponDocument extends Model
{
use HasFactory, SoftDeletes;
protected $table = "coupons_document";
protected $fillable = [
"id",
"cpf",
"coupon_id"
];
protected $hidden = [
'deleted_at',
'created_at',
'updated_at'
];
public function coupon()
{
return $this->belongsTo(Coupon::class, 'coupon_id', 'id')->withTrashed();
}
}
Controller
class CouponDocumentController extends Controller
{
static public function store($request)
{
$data = [];
foreach ($request->input('cpf') as $cpf) {
$data[] = [
'cpf' => trim($cpf),
'coupon_id' => 61
];
}
foreach ($data as $item) {
$couponDocument = new CouponDocument();
$couponDocument->fill($item);
$couponDocument->save();
}
}
}
Resources
class CouponsDocument extends Resource
{
use SearchesRelations;
public static $displayInNavigation = false;
public static $model = \App\Models\CouponDocument::class;
public static $title = 'id';
public static $search = [
'id',
'cpf',
'coupon_id'
];
public static function label()
{
return __('modules.couponDocument.button');
}
public static function singularLabel()
{
return __('modules.couponDocument.button');
}
public function fields(Request $request)
{
return [
Text::make(__('fields.couponDocument.name'), "cpf")
->sortable(),
];
}
where the resource is called
HasMany::make
__("fields.couponDocument.name"),
"documentRelationship",
CouponsDocument::class
I tried to do it with the standard functions of nova, but it ended up not working, I would like to know if there is any other solution