PHP Laravel Nova如何在数据库中保存多选值

Schema::create('selected_values', function (Blueprint $table) {
    $table->increments('id');
    $table->string('value');
    $table->timestamps();
});

use Laravel\Nova\Fields\Select;

public function fields(Request $request)
{
    return [
        // other fields
        Select::make('Selected Values')
            ->options([
                'value1' => 'Value 1',
                'value2' => 'Value 2',
                'value3' => 'Value 3',
            ])
            ->multiple(),
    ];
}

use Illuminate\Database\Eloquent\Model;

class YourModel extends Model
{
    // other code
    
    public function setSelectedValuesAttribute($values)
    {
        $this->attributes['selected_values'] = implode(',', $values);
    }
    
    public function getSelectedValuesAttribute($value)
    {
        return explode(',', $value);
    }
}

use Laravel\Nova\Fields\Text;

public function fields(Request $request)
{
    return [
        // other fields
        Text::make('Selected Values', function () {
            return implode(', ', $this->selected_values);
        }),
    ];
}