SQL with WebAssembly

[Infinity]

I would like to compile my application for WebAssembly. The animatedtiles example as described in this article https://blog.qt.io/blog/2019/03/05/using-docker-test-qt-webassembly/ works without any problems. In my application I use the sql module. If I want to compile it I get the following error:

Info: creating stash file /project/build/.qmake.stash
cd address/ && ( test -e Makefile || /usr/local/Qt-5.13.1/bin/qmake -o Makefile /project/source/address/address.pro ) && make -f Makefile 
cd user/ && ( test -e Makefile || /usr/local/Qt-5.13.1/bin/qmake -o Makefile /project/source/user/user.pro ) && make -f Makefile 
cd login/ && ( test -e Makefile || /usr/local/Qt-5.13.1/bin/qmake -o Makefile /project/source/login/login.pro ) && make -f Makefile 
Project ERROR: Unknown module(s) in QT: sql
Makefile:50: recipe for target 'sub-address-make_first' failed
make: *** [sub-address-make_first] Error 3
make: *** Waiting for unfinished jobs....
Project ERROR: Unknown module(s) in QT: sql
Project ERROR: Unknown module(s) in QT: sql
Makefile:152: recipe for target 'sub-user-make_first' failed
Makefile:127: recipe for target 'sub-login-make_first' failed
make: *** [sub-user-make_first] Error 3
make: *** [sub-login-make_first] Error 3

Why is the sql module not found?

[SGaist]

Hi,

AFAIK, the QtSql module is currently not available for web assembly.

@lorn-potter might be able to shed some more light on it.

[JonB]

@infinity , @SGaist
I asked this recently See the response I got at https://forum.qt.io/topic/105944/qt-for-webassembly-widget-example-gone/18

1.I understand about limitations like no local files, no sub-processes. What about MySQL database access via the Qt classes? Do I assume you cannot have your code access SQL db from browser?

Not at this point. Although someone has now ported sqlite to wasm, which would be the first step.

[lorn.potter]

Someone has ported sqlite to wasm...
https://github.com/fluencelabs/sqlite

You could start with that.
I am unclear if any work on the Qt side would be needed to get Qt compiled with support for sqlite.