如何在Laravel Eloquent中指定我的列不能为空？

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class YourModel extends Model
{
    protected $fillable = ['column1', 'column2', 'column3'];
    
    protected $guarded = ['column4', 'column5'];
}

YourModel::create([
    'column1' => 'value1',
    'column2' => 'value2',
    'column3' => 'value3',
]);

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class YourModel extends Model
{
    protected $fillable = ['column1', 'column2', 'column3'];
    
    protected $guarded = ['column4', 'column5'];
    
    public static function boot()
    {
        parent::boot();

        static::saving(function ($model) {
            if (empty($model->column1)) {
                throw new \Exception('column1不能为空');
            }
        });
    }
}