[Qt-jambi-interest] Cannot use Sql drivers

[Gunnar Sletta]

Bráulio Barros de Oliveira wrote:
> Hello,
> 
> I'm developing my first QtJambi application. It needs a connection to
> PostgreSQL, but, unfortunetely, my qt jambi installation doesn't detect its
> driver, even the included by default QSQLITE driver. For PostgreSQL plugin
> support, I've copied the plugin library from my qt installation to the
> $JAMBI/plugins/sqldrivers folder of the qt jambi binary bundle.
> 
> On the application launch, the following output is shown:
> QSqlDatabase: QPSQL driver not loaded
> QSqlDatabase: available drivers:
> 
> It seems that qtjambi is not looking for any plugin at all.
> I'm using the eclipse integration.
> Any help is appreciated.

Hi,

For Qt Jambi to load plugins from $JAMBI/plugins, you need to either 
call QCoreApplication.addLibraryPath(PATH_TO_JAMBI_PLUGINS) or set the 
environment variable QT_PLUGIN_PATH to $JAMBI/plugins.

There is also a good chance that the sql drivers that you picked from 
your Qt installation are binary incompatible with the version of Qt 
Jambi that you are using, in which case the plugins will either fail to 
load or crash your application. If you use C++ plugins with Qt Jambi we 
strongly suggest that you build both Qt and Qt Jambi from scratch to 
avoid binary incompatibility issues.

Did you look at the JDBC bridge? It has been available on labs for some 
time and was integrated into Qt Jambi 4.4.

http://doc.trolltech.com/qtjambi-4.4.0_01/doc/html/com/trolltech/qt/sql/QJdbc.html

-
best regards,
Gunnar