QSQLITE driver not loaded

Anh Phan

Hi everyone, I'm quite new to Qt. I'm now making a project which connects to a Sqlite database. When I run it in Debug mode everything seems ok but when i switch to Release mode it says :
QSqlDatabase: QSQLITE driver not loaded
QSqlDatabase: available drivers:
I've searched this problem on many websites but i couldn't solve this problem. Can anyone help me!

Nisix

@Anh-Phan Hi ! If you use Qt on Windows you need to past the .dll sqlite on your project files too.
Like this : %pathofproject% /project/debug/ PASTE HERE THE DLL.

Anh Phan

Oh thank you very much. It works perfectly when i run the .exe file in Debug folder, but the .exe file in Release folder still has the old problem.

mrjj

Just to be sure I understand.
Do you run the RELEASE build from the Creator or
do you try to run with the .exe in the release folder?

Anh Phan

@mrjj I run both of them and receive the same error.

mrjj

did u try to run it from Creator with the SQLIte Dll in RELEASE folder ?

Anh Phan

I will give it a try

Anh Phan

@mrjj i tried but it still has this problem.

mrjj

@Anh-Phan
Ok.
Can you try with this test project
https://www.dropbox.com/s/2ggexvrbeciiepw/dbtest.zip?dl=0
Works for me both in DEBUG and RELEASE
running from Creator.

Anh Phan

@mrjj I ran it but it still works only in DEBUG mode, in RELEASE it still has QSqlDatabase: QSQLITE driver not loaded error. I'm kinda confused now.

mrjj

@Anh-Phan
Ok , at least its consistent. :)

Do you use mingw or Visual studio ?
I assume you just use the online installer to install Qt and
have not compiled Qt yourself.

It must be a some sort of path problem.

Im confused too :)

Anh Phan

@mrjj i use mingw48_32 to compile, bro.

mrjj

@Anh-Phan
Hmm . me too.
Sorry I have really no idea how it cannot work when release.

Did you install using the online installer ?
Have you compiled anything yourself?

Can i try your project?

Anh Phan

@mrjj Yep, i used the online installer.

SGaist

Hi,

Maybe a silly question, but did you check that you currently have the corresponding .dll file in your Qt installation folder ?