feat: sku only numeric

app/Models/User.php

@@ -2,7 +2,6 @@
 
 namespace App\Models;
 
-// use Illuminate\Contracts\Auth\MustVerifyEmail;
 use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Foundation\Auth\User as Authenticatable;
 use Illuminate\Notifications\Notifiable;

app/Nova/Product.php

@@ -93,7 +93,8 @@ function ($request, $model) {
 
             Text::make('SKU')
                 ->sortable()
-                ->creationRules('required', new isSKUAvailable(intval($request->retailer_id), 0)),
+                ->creationRules('required', new isSKUAvailable(intval($request->retailer_id), 0))
+                ->rules('numeric'),
 
             Money::make('Price')
                 ->sortable()