Laravel Create方法不返回观察者插入的主键值

$model = new Model();
$model->column1 = 'value1';
$model->column2 = 'value2';
$model->save(); // 手动保存记录
$primaryKey = $model->getKey(); // 获取插入的主键值

$primaryKey = DB::table('table_name')->insertGetId([
    'column1' => 'value1',
    'column2' => 'value2',
]); // 插入记录并获取主键值

namespace App\Observers;

use App\Models\Model;

class ModelObserver
{
    public function created(Model $model)
    {
        $primaryKey = $model->getKey(); // 获取插入的主键值
        // 执行其他逻辑
    }
}

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use App\Observers\ModelObserver;

class Model extends Model
{
    protected static function boot()
    {
        parent::boot();
        static::observe(ModelObserver::class); // 注册观察者
    }
}