Mysql Laravel DB：：Transaction()

我有一些代码，并try 了两种方式.它没有按预期工作，也没有回滚数据

错误生成示例在GIT中:https://github.com/Namvarii/laravel-db-transaction-error

\DB::beginTransaction();

try {
    $order = Order::create([
        // data
    ]);

    $order->notes()->create([
        // data and cause a fail
    ]);

    // No morph map defined for model [App\Models\Order].

    $order->transaction()->create([
        // data
    ]);

} catch (\Exception $e) {
    \DB::rollBack();
    return "error";
}

\DB::commit();

return "success";

和

\DB::transaction(function() use ($offer, $request) {
    $buyer = auth()->user();

    $order = Order::create([
        // data
    ]);

    $order->notes()->create([
        // data
    ]);

    // throw error, "No morph map defined for model [App\Models\Order]" because not alias is defined.

    $order->transaction()->create([
        // data
    ]);
});

return "success";

在这两个示例中，出现了变形别名错误，请求失败，并显示消息No morph map defined for model [App\Models\Order]，但我想知道为什么Order::create([/* data */]);没有回滚并存储在数据库中.

update: Default laravel DB engine is null and my DB using MyIsam. 和 problem is that. thanks for answer @P.K.Tharindu