@mgiambance I don't mean use it as transaction, i want to lock the key while updating, I don't want any request to access the key before update is finished.

Yes i use Dependency Injection in Symfony and Service Container in Laravel.but in interview they required others design pattern like solid so i need to have a look.

Express Async Request Mongoose

Sure, i want to study it because i was asked in the interviews.

You all recommend to not study or not care about design pattern?

it recommended by friends, i thought it's a design pattern.

Thanks

great.