QDir::exists() returns false while directory exists

[Aleksey Asensus]

Similar issue to that one:
https://forum.qt.io/topic/124795/issues-with-qtdir-exist

While Qt doc says
https://doc.qt.io/qt-6/qdir.html#examples
to check dir existence do:

    QDir path(myPath);
    return path.exists() && path.isReadable() 

both functions return false while dir exists and readable (selected by QML FolderDialog). Qt 6.8.2, Ubuntu 22.04. What the problem could be?! Qt bug? How to solve?

[JonB]

@Aleksey_K
No need to call QDir::toNativeSeparators() here, the QUrl(myPath).toLocalFile() turns it into a Qt-platform-agnostic /-type path, which is all Qt file routines are happy dealing with. You only need toNativeSeparators() if you need to do something "external" which demands a native, real OS e.g. \-type path, such as passing it to an OS command or a native OS system call. Just so you know.

[J.Hilk]

Folrderdialog gives you a QUrl not a path that QDir would accept.
How to you convert it ?

[Aleksey_K]

@J-Hilk said in QDir::exists() returns false while directory exists:

Folrderdialog gives you a QUrl not a path that QDir would accept.
How to you convert it ?

I have not converted it, thought QDir should understand QUrl. So QDir::toNativeSeparators(QUrl(myPath).toLocalFile()) works - thanks!

[Aleksey_K]

This post is deleted!

[JonB]

@Aleksey_K
No need to call QDir::toNativeSeparators() here, the QUrl(myPath).toLocalFile() turns it into a Qt-platform-agnostic /-type path, which is all Qt file routines are happy dealing with. You only need toNativeSeparators() if you need to do something "external" which demands a native, real OS e.g. \-type path, such as passing it to an OS command or a native OS system call. Just so you know.

[Christian Ehrlicher]

@Aleksey_K said in QDir::exists() returns false while directory exists:

thought QDir should understand QUrl.

Where did you read this? A local directory is something totally different than an url...